Groundwater Policy Confusion at State Level

WGA’s Puglia on Sacramento’s Muddled Potable Groundwater Policy

By Patrick Cavanaugh, Farm News Director

 

Groundwater Quality

Many residents in California’s agricultural regions rely on groundwater from private wells rather than from municipal supplies for clean drinkable water. Test results on many of these wells have revealed excess nitrates and other dangerous elements. Indisputably, all state residents deserve clean potable water.

Who is Responsible?

Cris Carrigan, director of the State Water Resources Control Board (SWRCB) Office of Enforcement, issued confidential letters to growers in two regions, Salinas Valley and the Tulare Lake Basin, demanding these farmers supply potable water to the citizens in need.

“The letter represents a legal proceeding by the Office of Enforcement,” said Dave Puglia, executive vice president of the Western Growers Association (WGA). “Why they desire to keep it confidential is something they would have to answer, but I think sending that many letters to a community of farmers is a pretty good guarantee that it won’t remain confidential.”

Dave Puglia, executive vice president, Western Growers Association, groundwater

Dave Puglia, executive vice president, Western Growers Association

 

The first letters went to growers in Salinas one year ago. “Although there has been some advancement of the discussions between some of the growers in the Salinas Valley and the Office of Enforcement,” Puglia said, “I don’t think it’s been put to bed yet.”

Which Groundwater Supply?

“It’s critical to distinguish between entire communities in need of [municipal] drinking water assistance and domestic well users whose wells have nitrate issues. Those are two different things.”

“It’s important to keep that distinction. The state has spent money and is advancing programs to provide clean drinking water to small community water systems that don’t have that capability, and that’s appropriate,” Puglia clarified. “That is not what we’re talking about here.”

“We’re talking about a smaller number of individuals whose domestic wells are contaminated with nitrates. These are people not served by a municipal system.”

“Again, these are people who depend upon wells located on property that has been previously used for agriculture, and the groundwater has nitrate levels that exceed state limits. We are talking about one to maybe five household connections serviced by one well, so it is a very small service of water.”

“This is a much smaller universe than we’re accustomed to talking about when we talk about nitrate levels in drinking water. It often conjures up the image of municipal water systems that [cannot be treated.] That is a different problem entirely, and the state has made some advances in tackling that problem and needs to do more. This is something of a smaller nature, but the cost-impacts could be very significant.”

Replacement Water

“There are different ways of providing replacement drinking water for some period of time until those folks can be connected to municipal water service. That really should be the objective here; if a domestic well is that far gone, we should get these folks connected to a municipal water service,” Puglia said.

The bigger question is what should the state’s replacement water policy be for individuals whose wells are contaminated with nitrates? Puglia said, “The state of California and the federal government encouraged farmers to apply nitrogen for decades to produce something we all need—nutritious food preferably from American soil.

“Now, with the benefit of scientific advancement, we discover that much of that nitrogen was able to leach below the root zone and enter the groundwater supply.”

Irrigated Field in Salinas, groundwater

Irrigated Field in Salinas

Groundwater Policy Debate

“This was not an intentional act of malice to pollute groundwater. These were farmers doing [best practices] to provide food as they were coached and educated by our universities and by our state and federal governments.” Puglia said the state looks at this problem as if it were a case of industrial pollution and growers should be punished.

“That is fundamentally not what this is. I think it’s really important for the state of California, for Governor Jerry Brown, and for his administration, to stand back, take a hard look at this problem and differentiate it from industrial pollution, because it is not the same. They need to go back to the SWRCB’s recommendations for best solutions,” Puglia declared.

“Three or four years ago, the Water Board recommended to the legislature the most preferable policy solution for the public good was to have everyone chip in for clean water. This is just like how all of us pay a small charge on our phone bill for the California Lifeline Service for folks who can’t afford phone service,” Puglia said.

“If we have a connection to a water system, we would all pay a small charge on our water bill to generate enormous amounts of revenue that the state could use to fix not only nitrate contamination but all of the other contaminants in the state’s drinking water supplies. Many of those contaminants are far more hazardous than nitrate, such as Chromium-6 (a carcinogen), arsenic and other toxins that are industrial pollutants, that pose a much greater health risk.”

Puglia explained that in this case, the state bypassed its own preferred ‘public goods charge‘ policy option with regard to water. The state bypassed its second preferred policy option, which is a small tax on food. The state bypassed its third preferred policy option, a fertilizer tax. “State officials from Governor Brown’s office went straight to the policy option the State Water Board said it did not prefer, which is to target farmers.”

Complex Contamination Needs a Holistic Solution

Now the big question is who ought to bear the burden of paying for that solution, both on a temporary basis and then on a permanent basis? Puglia said, “The state itself and the State Water Board itself already projected three policy options that would be preferable.”

“These options would have spread the cost very broadly among Californians through three different mechanisms, seemingly in recognition of the fact that farmers were doing the right thing for decades in growing food using fertilizer. Fertilizer that contains nitrogen has been essential to growing food since the dawn of humankind.”

Puglia said that nitrate contamination of drinking water is a legitimate problem in California. However, it pales in comparison to the presence of industrial pollutants in drinking water supplies that are highly carcinogenic and highly toxic. Such water sources throughout southern California and parts of the Bay Area can no longer be used.

Rather than looking at this holistically, Puglia said, Governor Brown’s administration has focused exclusively on one contaminant, nitrate, that affects a relatively small number of Californians and is targeting one small group of Californians to pay for replacement water.  A holistic perspective would determine that California has a severe problem with its drinking water due to contamination by different toxic substances that vary in different regions of the state and that affect many Californians diversely.

“The obvious way to ensure people have safe, clean drinking water,” Puglia said, “is a broad solution, like a fee on water connections that we all pay. And that has been, in fact, the SWRCB’s preferred solution.”

“And, yet, we have made no effort as a state to move that policy forward. Instead, we are defaulting to running over a small group of people who are relatively defenseless, politically.”

“More importantly some people in the Governor’s Office, as well as leaders and secretaries in the Governor’s administration, including Matt Rodriquez, secretary, CalEPA, expressed some agreement with our position and sympathy with our predicament. Yet the letters continued to go out,” Puglia said.

2016-10-31T15:19:55-07:00October 31st, 2016|

California Rice Grower Demystifies Rice Industry

California Rice Grower Feeds Minds Also

 

By Patrick Cavanaugh, Farm News Director

 

By now, growers have harvested much of northern California’s rice. Most of it is already in the rice mill. While prices were low this year, production has been very good, according to Matthew Sligar, a third-generation rice grower in Gridley, up in Butte County.

California Rice Grower

Matthew Sligar, “How Rice is Harvested.”

“Yes, we just got done with rice harvest. We are chopping the rice straw that is left in the fields. We’re disking it in to aid in decomposition,” Sligar said.

“Then we flood the fields with about 4 to 6 inches of water, creating a natural habitat for migratory birds. We just let the field sit over the winter so the straw decomposes. We work it back up in the spring.”

Northern California rice growers dedicate the winter months, and even the early season months when fields are first flooded, to help migratory birds whose original habitat has been taken over by cities and expanding neighborhoods.

Birds by the millions – including ducks, geese and shorebirds – rest, feed and rear their young in rice fields during their annual migrations. “Our fields turn white like snow from the down floating feathers left behind by birds,” Sligar said.

Matthew Sligar, California Rice Grower and Blogger

Matthew Sligar, California Rice Grower and Blogger

And yet, due to global oversupply, rice prices are trending lower this season. “We had to put our rice into a marketing pool because we wanted to guarantee a home for it,” Sligar said. “We did not want to gamble on the cash market. We haven’t seen the returns yet; however, I got a great yield, and I hear most of Northern California got extremely good yields.”

“Hopefully, that will make up for some of the low price, and we might make some money. When you get a good year, you’ve got to save that money for bad years like this year, just make it through to next year,” Sligar said.

Besides farming rice, Sligar is a cyclist and a social media blogger. He produces great videos on all segments of the rice industry.

“That’s one reason why I started Rice Farming TV because whenever I’d be at a restaurant or some spot socializing, someone will say, ‘What do you do?’ I tell them that I farm rice. ‘Rice? Where do you live?’ I say, ‘I live in California.’ They don’t know that rice is grown in California, but it’s the best,” Sligar said.

 

Click below to view Sligar’s video, “How Rice is Harvested!”


Also, in Sligar’s repertoire is the best way to surprise someone you love in the middle of a busy rice season, in The Mile High Surprise!

 View more videos at ricefarmingtv.com.

2016-10-28T13:35:34-07:00October 28th, 2016|

Select Growers Asked to Remediate Nitrates in Water

Cris Carrigan Opens Dialogue With Growers about Nitrates in Water

 

By Patrick Cavanaugh, Farm News Director

 

Over the last year, 19 Salinas Valley growers, and recently 26 citrus growers on the east side of Tulare County, each received a confidential letter from Christian Carrigan, director, State Water Resources Control Board (SWRCB), Office of Enforcement. The letter constituted an invitation to a meeting to discuss the provision of uninterrupted replacement water to communities and individuals who rely on the region’s groundwater which contains too many nitrates.

Invitation recipients are growers who farm larger tracts of agricultural land in regions identified to have elevated nitrate-contaminated groundwater based on historical evidence. The ‘Harter Report,’ officially submitted to SWRCB in 2012 as, “Addressing Nitrate in California’s Drinking Water,” reinforced the nitrate problem.SWRCB nitrates

The letter presented recipients with a choice: provide replacement potable water to disadvantaged communities with substandard drinking water or face a mandated Cleanup and Abatement Order that would require the development, installation, and ongoing operation of expensive reverse-osmosis water treatment systems or other fixes.

“We’re looking at ways to have a broader dialogue with the larger agricultural community,” Cris Carrigan explained. “I sent the confidential letter to a group of agricultural land owners in Tulare County and because I offered to maintain its confidentiality, I really don’t want to talk about the contents of it now.”

“I should be clear, this is an action by the Office of Enforcement at the State Water Board,” Carrigan said. “It is led by Jonathan Bishop, chief deputy director. I am a legal officer and he’s my client, the decision-maker at the Board.”

“We have not talked about this with the board members, Tom Howard, executive director, or Michael Laufer, chief counsel,” Carrigan clarified. “We have preserved their neutrality by not communicating with them about this action in case we need to do an adjudicatory proceeding. We did the same thing in Salinas.”

Carrigan noted that his office does not want this to go into an adjudicatory proceeding. “We are really set up, primarily, to try and resolve this in a mutually acceptable and cooperative way. We think there are ways to do that. We’ve learned a lot from engaging with the agricultural community in Salinas. Now we hope to apply those lessons and learn some new things in Tulare County.”

Carrigan commented that he is having the right kind of dialogue with farmers. “We’re talking about the right kinds of things. Again, I understand that nitrogen means food, food means jobs. We need to have a scientifically defensible way to bring back [water] resource restoration, so that our aquifers can become clean again.”

“In the meantime, we have to prevent people from being poisoned by bad water. That is what this is all about,” Carrigan said.


Are Nitrates and Nitrites in Foods Harmful? (By Kris Gunnars, BSc, Authority Nutrition)

2016-10-25T15:46:02-07:00October 25th, 2016|

Ag Uses Sound Science to Help Fish

Ag Collaborates to Help Endangered Fish

 

By Patrick Cavanaugh, Farm News Director

 

Don Bransford, president of the Glenn-Colusa Irrigation District (GCID) as well as a member of the State Board of Food and Agriculture, expressed major concerns with the proposed State Water Resources Control Board (SWRCB) diversion of 40% of the water from many irrigation districts on rivers that drain into the San Joaquin River to increase flows in the Delta to protect endangered fish.

 

“It’s a very difficult challenge because it appears that the SWRCB wants to increase the flows in the Sacramento River. That water has to come from somewhere, and it looks like it’s going to come from the irrigation districts. Unless we can do environmental projects on the River to improve habitat for fish and re-manage our water, we have water at risk,” said Bransford.

Don Bransford, president, Glenn-Colusa Irrigation District

Don Bransford, president, Glenn-Colusa Irrigation District

 

Bransford, who is also a rice farmer, said “Everyone has their own science regarding protecting those species. We’re talking about salmon, steelhead trout, and of course the smelt.”

“The difficulty is, we believe they’re using a lot of old science. There is newer science that suggests there are better ways to manage this. And, if something does not work, then you change. You just don’t throw more water at it,” he noted.

“We think habitat improvements are important in providing refuge for the fish,” Bransford explained. “We’re looking at flushing rice water into the rivers to provide food. Currently, the rivers are pretty sterile because they are just channels now. If we could apply flows from rice into the rivers like we did for the Delta Smelt this summer, you’re providing food for smelt.”

Bransford noted the Northern California irrigation districts work with the U.S. Bureau of Reclamation to increase flows in certain areas of the Sacramento River at certain times. “Our irrigation district managers work with the Bureau to provide flushing flows on the upper Sacramento.” These flows clean out diseased gravel beds in the absence of natural high water flows.”

“So they used some extra water late March of this year,” Bransford elaborated, “to just turn the gravel over to freshen it up. It did help the fish, particularly the salmon,” said Bransford.


Glenn-Colusa Irrigation District (GCID), according to its website, is dedicated to providing reliable, affordable water supplies to its landowners and water users, while ensuring the environmental and economic viability of the region. As the largest irrigation district in the Sacramento Valley, GCID has a long history of serving farmers and the agricultural community and maintaining critical wildlife habitat. The District fulfills its mission of efficiently and effectively managing and delivering water through an ever-improving delivery system and responsible policies, while maintaining a deep commitment to sustainable practices. Looking ahead, GCID will remain focused on continuing to deliver a reliable and sustainable water supply by positioning itself to respond proactively, strategically and responsibly to California’s ever-changing water landscape.

2021-05-12T11:05:45-07:00October 24th, 2016|

Farm Water Coalition Shames State Water Resources     

Farm Water Coalition Shames SWRCB Over Proposal 

By Patrick Cavanaugh, Farm News Director

 

The California Farm Water Coalition (Coalition) was formed in 1989 to increase public awareness of agriculture’s efficient use of water and to promote the industry’s environmental sensitivity regarding water.

Mike Wade, executive director of the Sacramento-based Coalition, has major concerns about the State Water Resources Control Board (SWRCB)‘s proposal of taking 40% of the water from many irrigation districts along three rivers that flow into the San Joaquin River to protect an endangered fish. The SWRCB proposes to divert water from the Stanislaus, Tuolumne and Merced Rivers to increase flows in the Sacramento Delta.

Mike Wade, executive director, California Farm Water Coalition

Mike Wade, executive director, California Farm Water Coalition

Wade explained, “The Endangered Species Act (ESA) is important for the United States, and we want to see it work. However, it’s not working. It’s not helping fish, and it’s hurting communities.” But Wade wants to revise the ESA “in how we deal with some of the species management issues.”

Wade said SWRCB is doubling down on the same tired, old strategy that is not going to work any more now than it has in the past. “What happened in the past isn’t helping salmon. What’s happened in the past isn’t helping the delta smelt. You’d think someone would get a clue that maybe other things are in play, there are other factors that need to be addressed.”

The State Water Resources Control Board estimated the proposed 40% diversion of river flow would decrease agricultural economic output by 64 million or 2.5% of the baseline average for the region.

Ag officials warn that if the proposal goes through it would force growers in the area to use more groundwater—which they have largely avoided because the Turlock Irrigation District and Oakdale Irrigation District historically met the irrigation need of local farms.

This is the only agricultural area in the Central Valley that does not have critical overdraft problems. If the state takes away 40% of water available to growers, it could lead to a critical overdraft issue there as well.

2021-05-12T11:05:45-07:00October 21st, 2016|

Successful Temecula Winegrape Harvest Wrap-Up

Temecula Winegrape Harvest to Become More Mechanized

 

By Patrick Cavanaugh, Farm News Director

 

Winegrape harvest is going well in the Temecula area of Riverside County, east of San Diego. Ben Drake, president of Drake Enterprises, Inc., a vineyard and avocado grove management company there, summarized this year’s winegrape harvest. “We’re doing real well,” said Drake, who is also a grower board member of the California Department of Food and Agriculture (CDFA).

“We had some real hot weather in middle of June, which reduced some of our yields. We got through that warm weather. Vines recovered and some of the fruit recovered. We’re seeing a slight reduction in yield—somewhere between 10 and 20 percent overall—because of that hot spell.”

Ben Drake, Temecula Winegrapes

Ben Drake, president of Drake Enterprises, Inc. and grower board member of the California Department of Food and Agriculture (CDFA).

 

Harvest began toward the end of July and is now complete, Drake’s winegrape harvest is all hand done, not yet by machine. Drake said only one winery in the Temecula area has a machine.

Hand labor will change soon, according to Drake, because the new overtime bill mandates that farmworkers will receive overtime pay after working a threshold of 8 hours instead of 10. Drake is looking at machines that will dramatically decrease the hours of his workers—a consequence the state’s agriculture industry warned the Assembly about before they passed AB-1066.

“Overall,” Drake said, “it has been a long season. I grow about 35 to 36 different winegrape varieties, which allows me to pick some earlier and some later. That’s just the way they mature. It allows us to have plenty of time to get everything harvested.”


Drake Enterprises, Inc. the premier vineyard and avocado grove Management Company located in Temecula, California. Drake Enterprises, Inc. provides a full range of vineyard and avocado related activities to its clients. These include site selection, soils and water evaluation, variety, rootstock and scion selection, vineyard and avocado grove layout and development, vineyard and avocado grove management, harvest, consulting, avocado marketing strategy and grape brokerage.

2016-10-26T20:41:03-07:00October 20th, 2016|

Clinton’s Backdoor UFW Endorsement Deal Trumps Farmworkers’ Rights

Assemblyman Patterson Comments on Clinton’s UFW Endorsement vs. Farmworkers’ Rights

 

By Laurie Greene, Editor

 

As reported in, “Leaked Clinton emails include pledge to help UFW in fight with Gerawan Farming,” published by the Fresno Bee last Friday, presidential candidate Hillary Clinton, traded support for the United Farm Workers Union (UFW) endorsement and then conspired to undermine Fresno County-based Gerawan Farming and its farmworkers’ rights.

Jim Patterson

Assemblyman Jim Patterson (R-Fresno)


Assemblyman Jim Patterson (R-Fresno) has been supportive of the constitutional rights of farmworkers at Gerawan Farming whose votes cast in a sanctioned 2013 election to decertify UFW representation have never been counted. Under the jurisdiction of the California Agricultural Labor Relations Board (ALRB), the ballots were collected, sealed, and locked away. To date, election results and the location of the ballots are unknown.

 

In an exclusive interview, Assemblyman Patterson stated:

I think it’s the height of hypocrisy when a candidate for president of the United States goes behind closed doors and makes a backroom deal with an institution that is trying to deny the very privilege of having a free election to decide whether or not [farmworkers] want to be a part of the UFW.

Not supporting or recognizing the Gerawan workers’ right to an election to determine their own future—how they wish to organize, how they wish to value their labor and how they wish to conduct the relationship with their employer through elections—is to me, a slap in the face of the electoral process, of the fundamental constitutional right of everyone to be able to vote and to have a say in their labor and in their future.

alrb_ufw_fwr_logo_frIt also demonstrates just how deep and wide this intertwining web of deceitfulness really is. Of all things, for the democratic nominee for President of the United States to make a deal over something that is happening in Central California, with 3,000 workers who decided that they wanted to have elections?”

After the election, the ALRB took and hid the ballots. The ballots were never counted. Election results were never announced. The election was not the expression of individual farmworkers exercising their right to vote, but considered [by the ALRB] an unfair labor practice.

 [The Democratic nominee] decided to make a deal with the UFW over this. It tells me in no uncertain terms that the revolution that is happening with Silvia Lopez and the Gerawan workers—the independence, the thinking for themselves, the willingness to chart their own course with their employer—is frightening the UFW and the ALRB to its foundations.

To the degree that [the UFW] would literally go into a back room and get a pledge from the democratic nominee. . . Notwithstanding the facts—information about the election, the efforts of the ALRB and UFW to suppress [decertification] elections, and their choices for making decisions themselves. . . but to just simply decide to go low . . . and in this instance, go so low that she would be making a deal to abridgedestroythe fundamental right of an election. That is just unconscionable.

2017-05-10T16:28:50-07:00October 18th, 2016|

Unprecedented CAPCA Conference Attendance!

Agriculture Needs a Hero! Welcome to the Annual CAPCA Conference.

 

In an exclusive interview at the 42nd Annual California Association of Pest Control Advisers (CAPCA) Conference & Agri-Expo TODAY in Anaheim, CAPCA CEO and President, Ruthann Anderson, shared, “We have had an unprecedented response here at CAPCA.”

CAPCA CONFERENCE 2016 audience

Ruthann Anderson, CAPCA CEO and President

“Registrations are at an all-time high,” she continued. “We’ve actually sold out the entire show as well as registrations with 1600 attendees. There were just a handful of walkups that we unfortunately just couldn’t accommodate today. We are excited and looking forward to continuing to have a high professional continuing education program as well as an exhibit hall here today.”

“This year’s theme is ‘Fighting the Fear, Feeding the Nation,’ said Anderson, “so we’ll have Captain CAPCA as well as Doctor Foe here this morning.”

Click here to meet Captain CAPCA and Doctor Foe on this CAPCA ‘NEWS’ video!

 

Anderson reflected, “You know for us, CAPCA really represents the Pest Control Advisors (PCAs) for production ag and turf and ornamental. As a requirement for their continuing education, they need 40 hours in order to renew [their certification]. For us, bringing together continuing education as well as networking is so valuable for them as they move into the new year.”

 

Some “Top Gun” people speaking this year, according to Anderson, “are obviously some of our main sponsors. Bayer CropScience and FMC Corporation are both doing high-level presentations. We also have Kern County agricultural commissioner Ruben Arroyo talking about the new proposed regulations for buffer zones around schools, so that’s going to be a great conversation starter for all of our members.”

 

“We appreciate all of the support we receive,” Anderson stated. “It’s so valuable for us. We exist because of volunteers and we exist because of our membership. We are grateful for all of them.”


The California Association of Pest Control Advisers (CAPCA) represents more than 75% of the nearly 4,000 California EPA licensed pest control advisers (PCAs) that provide pest management consultation for the production of food, fiber and ornamental industries of this state.

CAPCA is dedicated to the professional development and enhancement of our member’s education and stewardship, which includes legislative, regulatory, continuing education and public outreach activities.

CAPCA membership covers a broad spectrum of the industry including agricultural consulting firms, U.C. Cooperative Extension Service, city, county and state municipalities, public agencies, privately employed, forensic pest management firms, biological control suppliers, distributors, dealers of farm supplies, seed companies, laboratories, farming companies and manufacturers of pest management products.

2021-05-12T11:05:45-07:00October 17th, 2016|

Despite Great Harvest, California Apple Growers Face Challenges

California Apple Growers Face Regulatory Disadvantage

By Patrick Cavanaugh, Farm News Director

 

Many California apple growers are in the midst of harvest season right now. Alex Ott, executive director of the Clovis-based California Apple Commission expects a 3% increase in production across the country. Ott foresees a 1% increase in California this season, where apples stand out because of their freshness.

“California is the fifth largest producer of apples in the United States,” Ott explained. “We are about the third largest exporter of apples in the United States. We like to pick, pack and ship. Unlike other states that like to store fruit and have that fruit around longer, California apple growers like to get in and get out,” Ott said.california-apple-commission-logo California Apple

“We have a small marketing window and we pride ourselves on fresh crops,” Ott elaborated. “So we try to get out of the market no later than December. Sometimes we go as late as January, but the idea is to [quickly] fill that niche window between the Chilean and the Washington state fruit.”

Alex Ott, executive director of the Clovis-based California Apple Commission

Alex Ott, executive director of the Clovis-based California Apple Commission

Yet, the California apple industry faces challenges going forward. Ott stated, “Over the last five years, California apple crop production has decreased by nearly 39%. A lot of that has to do with the changing of the crops. Any time you start to see an uptick in another crop, especially when it is not hand labor-intensive like apples, you will see a migration to those types of crops.”

Transitioning toward less labor-intensive crops may accelerate since Gov. Jerry Brown signed AB 1066. This bill will enable California farm employees to accrue overtime pay after working an 8-hour day, instead of a 10-hour day.

“It’s definitely going to be a challenge for California apple growers,” Ott said, especially given the labor shortage. “So apple production in the state will decrease.”

Ott lamented many countries already produce a lot of these other less labor-intensive crops. AB 1066 definitely puts us at a competitive disadvantage in keeping up with demand. The challenge is how can California apple growers compete with farmers in other state and countries who can do it faster and cheaper?

2016-10-14T18:26:24-07:00October 14th, 2016|

ACP Spread in Bakersfield Area, Ingenious Research Proceeds

Ingenious Research Effort to Fight ACP Spread with Natural Predators

 

By Joanne Lui, Associate Editor

 

beth_grafton-cardwell

Beth Grafton-Cardwell, Cooperative Extension specialist, University of California, Riverside Department of Entomology

As we have reported in-depth before on California Ag Today, the Asian Citrus Psyllid (ACP) is a tiny, mottled brown insect that poses an ever-increasing threat to the state’s robust citrus industry, as well as to residential citrus trees. The pest can spread a bacterium known as Huanglongbing (HLP) that is fatal to citrus trees. The disease has nearly shut down Florida’s citrus industry.

Beth Grafton-Cardwell, cooperative extension specialist in integrated pest management, UC Riverside Department of Entomology, explained the significance of the recent ACP spread to Bakersfield. “That is really problematic because it’s mostly in the urban areas. It’s very difficult to find, to control and to stop that spread. It’s going to move out from that region into the local citrus orchards, and so there are lots of meetings and discussions right now to mobilize growers to get treatments to help protect their citrus orchards against the psyllid.”

#CitrusMatters

#CitrusMatters

To contain the ACP problem, Grafton-Cardwell stated, “There are traps everywhere, but the traps are not terribly efficient. So, we really need to carefully examine groves and flush [new leaf growth] for the nymph form,” she said.

According to Agriculture and Natural Resources, University of California’s Statewide Integrated Pest Management Program:

Adults typically live one to two months. Females lay tiny yellow-orange almond-shaped eggs in the folds of the newly developing “feather flush” leaves of citrus. Each female can lay several hundred eggs during her lifespan.

ACP UC IPM

ACP (Source: ACP UC IPM)

The eggs hatch into nymphs that are wingless, flattened, yellow or orange to brownish, and 1/100 to 1/14 inch long. Nymphs molt four times, increasing in size with each nymphal stage (instar), before maturing into adult psyllids. The nymphs can feed only on soft, young leaf tissue and are found on immature leaves and stems of flush growth on citrus.

Save Our CitrusThe nymphs remove sap from plant tissue when they feed and excrete a large quantity of sugary liquid (honeydew). Each nymph also produces a waxy tubule from its rear end to help clear the sugary waste product away from its body. The tubule’s shape—a curly tube with a bulb at the end—is unique to the Asian citrus psyllid and can be used to identify the insect.

Grafton-Cardwell and other experts are concerned because once the ACP becomes established in urban areas, it is difficult to eradicate. “It starts spreading into the commercial citrus, and we’re off and running,” she commented.

bayer-save-our-citrusIn a ingenious effort to control the spread of the psyllid, trained teams of entomologists have imported Tamarixia radiata, a tiny wasp that naturally preys on ACP, from Pakistan to research and release in California. A cooperative effort of the University of California Riverside, Citrus Research Board, United States Department of Agriculture and California Department of Food and Agriculture, researchers are also exploring the effectiveness of another beneficial insect called Diaphorencyrtus aligarhensis to assist Tamarixia with control of the Asian citrus psyllid. To see where Tamarixia and Diaphorencyrtus have been released, visit this University of California’s website map at, “Distribution of ACP, HLB and Parasites in California,” and turn on the parasite layers.
Grafton-Cardwell said, “They’re going to inundate that area,” with natural ACP predators, “so hopefully that will push back a little bit.”

2021-05-12T11:05:46-07:00October 10th, 2016|
Go to Top