Breaking News: Cal Poly Opens New Greenhouse and Insect Rearing Facility

New Greenhouse Facility Opens to Save Citrus from Psyllids that Vector HLB

Facility to Rear Tamarixia Radiata, Natural ACP Predator

By Patrick Cavanaugh, Farm News Director

Scores of citrus industry leaders, citrus growers, scientists and CDFA officials attended the ribbon cutting event TODAY at the opening of a new greenhouse on the Cal Poly Pomona campus to rear Tamarixia radiata, a tiny parasitic wasp imported from Pakistan because it is an Asian Citrus Psyllid (ACP) nymph predator. ACP, in turn, is a serious nonnative citrus pest that can vector Huanglongbing (HLB)—a deadly citrus disease also known as Citrus Greening—that has devastated the powerhouse citrus

industry in Florida, threatens to ruin additional citrus economies, and is the biggest threat the California citrus industry has ever faced.

According to the United States Department of Agriculture Animal and Plant Health Inspection Service (USDA-APHIS), infected citrus trees “produce fruits that are green, misshapen and bitter, unsuitable for sale as fresh fruit or for juice. Most infected trees die within a few years.” ACPs have been detected in Alabama, American Samoa, Arizona, California, Florida, Georgia, Guam, Hawaii, Louisiana, Mississippi, Northern Mariana Islands, Puerto Rico, South Carolina, Texas and the U.S. Virgin Islands. Of those locations, the HLB disease has been detected in California, Florida, Georgia, Louisiana, Puerto Rico, South Carolina, Texas and the U.S. Virgin Islands.

ENTER: Tamarixia radiata

Use of the ACP predator, Tamarixia radiata as a biological control for ACP was discovered by Mark Hoddle, biological control specialist and principal investigator, UC Riverside ( UCR), Department of Entomology. The first release of Tamarixia was in December 2011 after USDA-APHIS cleared the natural enemy for release from the Quarantine Facility at UCR.

Mark Hoddle UC Riverside Department of Entomology

“Tamarixia can kill ACP nymphs in two different ways,” explained Nick Hill, a Tulare County citrus producer and Citrus Pest & Disease Prevention Program (CPDPC) chair. “The first is parasitism. In this instance, a female parasitoid lays an egg underneath a fourth or fifth instar—the larger and final developmental stage of the ACP nymph before becoming an adult—nymphs that are most preferred by Tamarixia for parasitism. When the egg hatches, the Tamarixia larva begins to feed on the under-surface of the ACP nymph. Eventually the larva completely excavates the body cavity of the ACP nymph and pupates inside the empty shell of its host.”

Hill explained the first releases of the tiny and harmless wasp will occur this fall in urban areas, “to help control ACP so that we do not have to do mitigations such as spraying in those areas. We hope to get to a point where we no longer need to go into people’s yards and ask if we can treat the trees.”

“The issue,” commented Valerie Melano, professor and chair, Cal Poly Pomona Plant Sciences and interim chair, Cal Poly Agribusiness & Food Industry Management/Agricultural Science, “is that we need to come up with the best possible ways to raise enough wasps for big releases to prey on ACP. We will have CDFA employees working in this green house, as well as student workers who have participated in our research program all along,” noted Melano.

Nick Hill, a Tulare County citrus producer and Citrus Pest & Disease Prevention Program (CPDPC) chair.

Hill added, “The idea is to get enough Tamarixia out there so they start reproducing themselves and they become self sufficient. This is tough to accomplish, but researchers think if they can get big numbers of the wasp into the urban areas, they can put a big dent in lowering the populations of ACP.”

Cal Poly Pomona Greenhouse

The new Cal Poly 5,040-square-foot research greenhouse, built in collaboration with Citrus Research Board and constructed through a $400,000 grant from the Citrus Pest & Disease Prevention Program, will house the second Tamarixia production program in California. CDFA’s Mount Roubideaux facility in Riverside houses current production. Both facilities will support the CPDPC biological control program that oversees releases in urban areas with high ACP populations.

The new greenhouse should produce a 1-1.5 million wasps. “It’s a very nice facility,” said Hill. “We are trying to boost the biological control program to produce four million Tamarixia a year.”

California Quarantine

The California Department of Food and Agriculture (CDFA) operates an extensive monitoring program to track the distribution of the insect and disease in both residential areas and commercial citrus groves. Results have determined quarantine zones, guided releases of biological control agents, and prioritized areas for a residential chemical control program. Nearly all of southern California is under quarantine for ACP, due to the fact that more than 15 residential trees have been discovered to be in infected with HLB.

The ACP quarantine in California includes parts of the following counties: Fresno, Kern, Kings, Madera, Monterey, San Benito, San Joaquin, San Luis Obispo, San Mateo, Santa Clara, and Stanislaus; and the following entire counties: Imperial, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, Tulare County, and Ventura.

Asian Citrus Psyllid Cooperative Program
California, Arizona, Baja California, and Sonora (USDA-APHIS). Visit our Citrus Diseases page to identify a plant infected by citrus greening, citrus canker, citrus black spot and sweet orange scab. If you detect an infected plant, report it immediately.

California Ag Today2021-05-12T11:05:51-07:00July 25th, 2016|

Field Bindweed Control Requires Multiple Programs

Consistent Management Needed to Eradicate Bindweed

By Laurie Greene, Editor

Kassim Al-Khatib, professor, UC Davis Department of Plant Sciences and UCANR Cooperative Extension specialist in weed science, discussed field bindweed, a problematic weed that has the ability to regrow even with chemical and mechanical control.

“This is weed has been around for a long time,” Al-Khatib said. “It adapted pretty well to hot, dry land areas because it has a long root with a lot of reserve in it. Whatever you try to do, the plant still has reserve in the root and can regrow again.”

The weed scientist explained that bindweed is so problematic, it has to be assessed and managed every season in a variety of ways in order to control it. “If you do a mechanical control, the plant can come back. If you do chemical control, the plant will come back. If you think that you can control it with one shot or in one season, you’re going to be disappointed. This is a serious weed problem that requires a program with multiple approaches over multiple years,” he said.

Field bindweed (Photo by Jack Kelly Clark, UC
Statewide IPM Program)

The weed is also difficult to eradicate, according to Al-Khatib, “because there’s a huge seed bank, plus these seeds have a hard coat, which means they can stay in the soil longer. If you try to germinate some of them this year, you’re going to have more seeds coming next year.”

Al-Khatib emphasized a multiple approach is still the best way to reach consistent, effective results. “The key point with field bindweed is to be consistent, have a program and envision what you can do over multiple years to get rid of it. Herbicide may suppress and weaken bindweed, but it is not going to control it or eradicate it. You need multiple approaches—chemical, mechanical, some biological.”

He offered that mites, if they can get established, have been found to feed on field bindweed, another example of using a multi-pronged eradication approach. Mildew can also weaken it. “The point I want to make,” Al-Khatib repeated, “is it takes a multiple approach, multiple tools, and multiple years before you get rid of it.”

Resources:

Field Bindweed, How to Manage Pests: Pests in Gardens and Landscapes, UC IPM

California Ag Today2021-05-12T11:05:52-07:00July 14th, 2016|

BREAKING NEWS: ACP QUARANTINES IN MERCED AND MONTEREY COUNTIES

ASIAN CITRUS PSYLLID (ACP) QUARANTINES IN MERCED AND MONTEREY COUNTIES

Quarantines are now in place in both Merced and Monterey Counties due to recent Asian citrus psyllid (ACP) detections. One ACP was detected near the City of Merced in Merced County and two ACP in one trap within the City of Salinas in Monterey County.

The quarantine zone in Merced County measures 123 square miles, bordered on the north by Kenney Avenue; on the south by W Dickenson Ferry Road; on the west by Shaffer Road; and on the east by

SAVE OUR CITRUS app is a free USDA iPhone to report and identify the four leading citrus diseases: citrus greening, citrus canker, citrus black spot and sweet orange scab. Report your symptoms, upload a photo and citrus experts will respond. ACP

E Yosemite Avenue. Monterey County’s quarantine measures 111 square miles and is bordered on the north by Pesante Road; on the south by the Salinas River; on the west by Castroville Road; and on the east by Gabilan Creek. The quarantine maps for both Merced and Monterey Counties are available online at: www.cdfa.ca.gov/go/acp-maps. Please check this link for future quarantine expansions in these counties, should they occur. Quarantines in new counties will be announced separately.

The quarantine prohibits the movement of citrus and curry leaf tree nursery stock, including all plant parts except fruit, out of the quarantine area and requires that all citrus fruit be cleaned of leaves and stems prior to moving out of the quarantine area. An exception may be made for nursery stock and budwood grown in USDA-approved structures which are designed to keep ACP and other insects out. Residents with backyard citrus trees in the quarantine area are asked not to transport or send citrus fruit or leaves, potted citrus trees, or curry leaves from the quarantine area.

ACP county-wide quarantines are now in place in Imperial, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, Tulare and Ventura Counties, with portions of Alameda, Fresno, Kern, Kings, Madera, Merced, Monterey, San Benito, San Francisco, San Joaquin, San Luis Obispo, San Mateo, Santa Clara, and Stanislaus counties also under quarantine.

The ACP is an invasive species of grave concern because it can carry the disease huanglongbing (HLB), also known as citrus greening. All citrus and closely related species, such as curry leaf trees, are susceptible hosts for both the insect and disease. There is no cure for HLB and once a tree becomes infected, the diseased tree will decline in health and produce bitter, misshaped fruit until it dies. In California, HLB has only been detected on residential properties in Los Angeles County. This plant disease does not affect human health.
Residents in the area who think they may have seen ACP or symptoms of HLB on their trees are urged to call CDFA’s Pest Hotline at 1-800-491-1899 or your local agricultural commissioner’s office (Merced County (209) 385-7431; Monterey County (831) 759-7325). For more information on the ACP and HLB, please visit: www.cdfa.ca.gov/go/acp.

California Ag Today2021-05-12T11:05:52-07:00July 14th, 2016|

Jasieniuk on Weed Evolution

Tracking Herbicide Resistance in Weed Evolution

By Emily McKay Johnson, Associate Editor

Marie Jasieniuk, professor and weed scientist at UC Davis College of Agricultural and Environmental Sciences, discussed her groundbreaking research, “I work on the population genetics and evolution of agricultural weeds and invasive plants,” she said. “We use molecular tools to look at the origins and spread of weeds. We also use molecular tools and genetic studies to understand the evolution of herbicide resistance in weeds,” Jasieniuk added, “to be able to propose management approaches that reduce the likelihood of further evolution and spread of resistant weeds.”

UC Davis Annual Weed Day 2016

Jasieniuk and her team identify the origins of invasive plants, and determine how they were introduced. “We study how they were introduced, how they have spread and whether they have been introduced multiple times. Again, if we understand how they’re spreading, we can do something to try to stop the spread,” she said.

Italian rye grass, a weed Jasieniuk is currently studying, is problematic because it is resistant to Roundup, a popularly used weed and grass killer by growers. “UC ANR Cooperative Extension specialist, now emeritus, Tom Lanini, and I sampled over 100 locations of Italian rye grass and tested them for resistance to Roundup ten years ago,” she said about the project, funded by USDA. “Last year, we re-sampled all of those sites, and we’re re-testing to see if there’s been an increase or a decrease or no change in resistance to glyphosate, to Roundup,” she said.

Roundup isn’t the only weed and grass killer available on the market. “We’re looking at resistance to three other herbicides,” she said. Working with growers to determine the most efficacious weed treatments that also reduce the likelihood of wood resistance to herbicides,” Jasieniuk explained, “We interview growers about their herbicide use, non-chemical approaches, and integrated management techniques to identify management practices that correlate highly with low or no resistance,” she explained.

Resistance management is found to be more effective with a rotation of various herbicides. “What you want to do is rotate different types of herbicides with different modes of action,” Jasieniuk said. “Perhaps do tank mixes and incorporate non-chemical approaches as well,” she added.

Eliminating weeds can be as simple as disking and digging them out with a shovel when there are only a few. “I think, in many cases, this would have done a lot to prevent new weeds from coming in and certainly resistant weeds from spreading,” she noted.

California Ag Today2021-05-12T11:05:53-07:00July 11th, 2016|

Steve Koike on Resistant Cultivars

The Search for Resistant Cultivars

By Emily McKay Johnson, Associate Editor

In the second part of our series with Steve Koike, plant pathology farm advisor for UC Division of Agriculture and Natural Resources, Cooperative Extension in Monterey County, the focus is on the critically needed research on resistant cultivars. Koike, who has focused his research since 1989 primarily on the understanding of disease systems and the investigation of new methods of disease control, said, “The role or the need for resistant cultivars is tremendous.”

“Some good case studies of resistant cultivar research address soil-born problems on lettuce,” Koike explained. “For example, Fusarium wilt and Verticillium wilt on lettuce could be managed lightly; but in order to overcome those diseases, resistant lettuce varieties need to be in place.”

Steve Koike, UC Cooperative Extension, Monterey County.

“First discovered in 1995 on the Central Coast,” said Koike, “Verticillium wilt has the potential to infect and damage numerous different crops. And although Fusarium wilt was typically unseen in the San Joaquin Valley, it has recently begun to appear on the Central Coast.”

Continued improvement of management techniques upon discovering initial disease symptoms is necessary, according to Koike. “Symptoms of the disease usually appear on the lower leaves of plants, around the edges, and the areas between the veins can turn a yellowish-brown.”

“Strawberries currently have three really important disease pressures state-wide: Verticillium wilt, Macrophomina (charcoal rot) and Fusarium wilt,” Koike commented. “Even the fumigation tools we have are not cleaning them up 100 percent, so we have problems.”

“We will continue to have problems,” Koike elaborated, “until there are truly resistant strawberry varieties to those pathogens. Plant breeders understand that IPM management of these diseases is so dependent on developing resistant varieties,” he said, “but we’re not there yet. We do not yet have truly resistant lettuce or strawberry varieties out in the field,” Koike said.

_______________________________

Koike and his fellow researchers discovered a new race of the downey mildew pathogen in spinach that has been designated race 16. While there are some varieties that are supposedly resistant to race 16, Koike noted that there is still more research to be done.

To read the first part of our series on Downey Mildew, click here.

California Ag Today2021-05-12T11:05:54-07:00June 27th, 2016|

Postharvest Short Course Focused on Taste and Quality

UC Davis Postharvest Course Covers Food Loss, Produce Handling

By Lauren Dutra, Associate Editor

The 38th annual Postharvest Technology of Horticultural Crops Short Course concluded TODAY, June 24 at UC Davis. Presented by Beth Mitcham, director of the Postharvest Technology Center, the course focused on postharvest produce quality and safety.

Beth Mitcham, Director of the Postharvest Technology Center at UC Davis.

“This class provided a really broad overview of all the topics that are relevant for postharvest handling of produce, including fruits, vegetables, nuts, and also ornamentals,” said Mitcham. “We cover the crops that are grown in California, but because our audience includes a lot of people from around the world who want to learn the basics about postharvest handling, we also cover a few crops that aren’t grown in California for commercial purposes. Furthermore,”she noted, “we also address some of the latest technologies that are available for maintaining excellent quality,”

Maintaining a good cold chain throughout the entire shipping line is critical, according to Mitcham. “We talk a lot about temperature,” she elaborated. “In fact, we tell students the three most important things about postharvest biology and technology are: temperature, temperature and temperature. We discussed many other technologies during the week, but they are secondary to good temperature management,” she noted.

Mitcham also mentioned food waste and how to control it. “So much effort goes into growing the crop, which includes harvesting at the prime of ripeness and getting it in the pre-cooler, on the trucks and to the market. But, people buy it, put it in their refrigerator and then don’t eat it. It goes bad and they waste it. It does happen,” said Mitcham. “Our goal is to try to make the product as hearty as possible while retaining really good flavor so it can last in your refrigerator as long as possible but also so people want to eat it, so hopefully it doesn’t sit in there and degrade.”

In reducing postharvest losses, Mitcham commented on the dissonance between addressing postharvest flavor and consumer satisfaction, “In some ways they are two opposite ends of the spectrum; some of the things we do to reduce losses are counter to delivering good flavor to consumers,” she said. “We really need to do both, and that was a big part of our message this week.”

Also at the event, the California Leafy Green Marketing Agreement (LGMA) discussed food safety principles, and Trevor Suslow, a UC Davis Plant Pathologist with the Postharvest Technology Center, discussed good agricultural practices (GAP) for food safety.

California Ag Today2021-05-12T11:05:54-07:00June 24th, 2016|

New IPM Work on Brown Stink Bug

New IPM Approach to Brown Stink Bug In Desert Cotton

By Patrick Cavanaugh, Farm News Director

This year, the UC Division of Agriculture and Natural Resources, Cooperative Extension, Riverside County began an Integrated Pest Management (IPM) program to control Euschistus servus, or brown stink bug, a problem in Southern California’s cotton production areas.

Vonny Barlow, a UC Cooperative Extension farm advisor in Riverside County

Vonny Barlow, a UC Cooperative Extension farm advisor in Riverside County began evaluating brown stink bug in cotton last year, and he received additional funding this year from a National Institute of Food and Agriculture (NIFA) grant administered through North Carolina State University, to continue his research this year. Barlow just hired two interns to work with brown stink bug in the Palo Verde Valley in Southern California.

The pest was known to exist in Arizona for about eleven years, but was not a critical issue until about three years ago, when it moved into California. California cotton growers had to spend a lot of money to spray to manage the insect, and it just wasn’t economically feasible.

“In many areas in the south, the brown stink bug pierces into the cotton boll with its proboscis-like mouthpart—a stiff, short straw,” said Barlow. “Once the cotton boll is pierced, the brown stink bug tries to feed on the cotton seed. The problem is the puncture allows bacteria to enter and boll rot to set in. Boll rot is the issue because it lowers yield quality; without boll rot, the brown stink bug is much more of a manageable pest.”

Spraying is not the answer to control the bug, according to Barlow. “We are going to look at an area-wide pest management approach by just essentially surveying the pest control advisers (PCAs) and growers about cropping that is near or even some miles away from cotton,” he said. “Where is the brown stink bug showing up? When did it show up? Is it moving? When are you going to harvest? Is it moving into the cotton? That way, we can give the cotton growers a better idea of when they should start management practices for brown stink bug, instead of just routinely calendar-spraying every two weeks.”

“We hope to predict when brown stink bug will move into cotton. Farmers who just harvested wheat should expect it will come into your field within the week. Start scouting; it is another very good IPM tactic to reduce sprays and to better manage pests,” said Barlow.

Featured image: Brown Stink Bug (Source: Brown Stink Bug (Source: “Chemical Efficacy Trial using Select Insecticides against Brown stink bug, Euschistus servus on Commercially Planted Cotton” by Vonny Barlow, University of California, Agricultural and Natural Resources, Riverside County, April 2016 issue of “Postings from the Palo Verde” newsletter)

California Ag Today2021-05-12T11:05:54-07:00June 23rd, 2016|

Downey Mildew Continues to Challenge Leafy Greens

Downey Mildew Continues to Threaten Lettuce and Spinach

By Patrick Cavanaugh, Farm Director

One of the many facets that makes California Agriculture so successful is the hard-working group of farm advisors who assist growers with a multitude of plant and pest issues. Steve Koike, plant pathology farm advisor for UC Division of Agriculture and Natural Resources, Cooperative Extension in Monterey County, noted, “It has been a fairly typical year, and I wouldn’t say any particular new disease has been noteworthy, which is good for the growers.”

Steve Koike, farm advisor of UC ANR Cooperative Extension, Monterey County.

Koike, whose research focuses primarily on understanding disease systems, identifying new diseases and examining new methods of disease control, said growers “don’t like to see new diseases come out of our work. The main concern, downey mildew, continues to be challenging for both lettuce and spinach growers.”

“We started in the early spring with heavy mildew on both lettuce and spinach crops,” explained Koike, “and it’s remained pretty heavy on lettuce throughout the spring and early summer here. Spinach downey mildew goes up and down, which is not unusual.” he said. “We had some heavy mildew weeks for spinach growers, then we didn’t hear anything, then we heard that it had died down, and then ten days ago there was another surge. It’s one of those things that is hard to predict because it is variable.”

Since starting his farm advising position in 1989, Koike has been involved in educational programs and applied research in vegetable, fruit and ornamental crop diseases. Because downey mildew can overwinter in perennial crops, its continued occurrence is not too surprising.

“Earlier this year, Jim Correll, my cooperator at University of Arkansas, other leaders in the industry and I finally did confirm race 16, a new biotype of downey mildew. A few years ago, it was only race 12; it is moving target,” he noted.

“Although we have confirmed Race 16 on spinach, we are a little concerned because there are reports of disease on some race 16-resistant varieties.” Koike said.

Featured image: Downey Mildew (Source: UCANR Cooperative Extension, Tehama County)

California Ag Today2021-05-12T11:05:55-07:00June 22nd, 2016|

Dry Weather Affecting Cattle Ranchers

Cattle Ranchers Hit Hard in the South Valley, Move to Greener Pastures

by Emily McKay Johnson, Associate Editor

Josh Davy, a University of California, Division of Agriculture and Natural Resources, Cooperative Extension livestock, range and natural resources advisor in Tehama County reported good news for the cattle industry despite dry weather conditions around the state.

Josh Davy, UCCE Tehama County livestock, range and natural resources advisor (Source: UCCE Tehama)

Heading into last fall, the feed year started off relatively dry, according to Davy; however the end-of-season crops produced a better forage than the year before. Though prices slid for the cattle farmer, Davy said optimisticly, “We’re happier on our range conditions—as compared to the previous years that we’ve had—by a long shot.” he said.

The drought that plagues California still directly impacts cattle ranges, and ranchers are not quite out of trouble. Davy had to resort to feed supplementation through the month of December. “We didn’t have to supplement as much as in the previous few years,” he said, “but we definitely did this fall.” Fortunately the winter months were short and the spring rainfall produced good growth—good assurances that will help Davy and his team make it through next year.

Davy has fortunately sidestepped hardship with a tinge of luck, but it hasn’t been as easy for ranchers in the south of the state. When cattle lack enough sustenance, a domino effect is felt all across the state of California; a lactating cow may not produce enough milk to feed her calves.

The cows like lush grass, a rarity in the Central and South Valley summer months. Winter options for cattle are either winter range ground or mountain meadow ground where greenery is still prevalent. Some ranchers haul their cattle to summer pasture feedlots to graze, while some prefer Oregon instead.

“We’re dried off here to where you might find a swell with a little rye grass in it that’s still green,”Davy said regarding the disappearance of lush land, “but pretty much everything else, the oats and all that stuff, they’re done here.”

Looking forward, Josh Davy is hoping irrigation water will sustain not only the beef cattle, but the pastures as well, to keep the herds stationary and munching on green grass.

California Ag Today2021-05-12T11:17:13-07:00June 8th, 2016|

Boost in Butte County Rice Production

Butte County Rice Growers and Communities Are Optimistic

By Emily McKay Johnson, Associate Editor

Butte County rice growers are all smiles this year as regional filled-to-capacity water allotments have progressed crop production in a very timely manner. Randall Mutters, the county director of the University of California (UC) Cooperative Extension in Butte County, specializes in rice production.

Randall Mutters, county director of the UC Cooperative Extension in Butte County (Source: UCCE Butte County)

Butte County, known as the “land of natural wealth and beauty,” hosts the second largest acreage of rice in California and a population of over 220,000 residents as of 2012. Rice production is imperative for supporting local growers and surrounding communities. Mutters reiterated, “When the agricultural base is doing well, the community as a whole prospers.”

As growers continue to cultivate their rice, businesses and communities in the area are incredibly optimistic. Mutters explained, “I fully expect to have close to 500,000 acres of rice planted this year,” a remarkable number compared to last year’s 425,000 planted acres.

Mutters said, “It’s been relatively warm and dry, with just a few sprinkles here and there, but not enough to really slow down operations. The season is progressing very timely.” Also encouraging to Mutters, is pests that are typically an early season problem, have not been troublesome this year.

The UC Cooperative Extension in Butte County monitors and protects the agricultural industry by offering educational resources to promote technology and other strategies for farmers. Though the price of rice is not very strong, the community as a whole is enjoying their success.

California Ag Today2021-05-12T11:00:54-07:00June 7th, 2016|

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California Ag News…
At Your Fingertips!

New Greenhouse Facility Opens to Save Citrus from Psyllids that Vector HLB

Facility to Rear Tamarixia Radiata, Natural ACP Predator

By Patrick Cavanaugh, Farm News Director

ENTER: Tamarixia radiata

Cal Poly Pomona Greenhouse

California Quarantine

Consistent Management Needed to Eradicate Bindweed

By Laurie Greene, Editor

Resources:

ASIAN CITRUS PSYLLID (ACP) QUARANTINES IN MERCED AND MONTEREY COUNTIES

Tracking Herbicide Resistance in Weed Evolution

By Emily McKay Johnson, Associate Editor

The Search for Resistant Cultivars

By Emily McKay Johnson, Associate Editor

UC Davis Postharvest Course Covers Food Loss, Produce Handling

By Lauren Dutra, Associate Editor

New IPM Approach to Brown Stink Bug In Desert Cotton

By Patrick Cavanaugh, Farm News Director

Downey Mildew Continues to Threaten Lettuce and Spinach

By Patrick Cavanaugh, Farm Director

Cattle Ranchers Hit Hard in the South Valley, Move to Greener Pastures

by Emily McKay Johnson, Associate Editor

Butte County Rice Growers and Communities Are Optimistic

By Emily McKay Johnson, Associate Editor

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California Ag News… At Your Fingertips!

California Ag News…
At Your Fingertips!