Labor Challenges in Sweet Potatoes

Challenges Are High Demand for Innovation

By Mikenzi Meyers Associate Editor

Harvest for sweet potatoes is in full swing, which means long hours and high labor expenses for producers. Scott Stoddard, of the UC Cooperative Extension in Merced County, knows the difficult task at hand in managing time and money.

With new overtime laws in place, the extended work days during harvest can be costly to farmers. With insight into several operations, Stoddard explained, “Everybody is crunched and trying to get as much as they possibly can get done in a day.”

However, this isn’t the only issue farmers are facing, because although hourly pay is on the rise, labor is becoming more difficult to find.

Stoddard said, “I had a guy tell me last week when I was harvesting sweet potatoes that it is getting a little bit harder to find labor.”

All of these factors, he concluded, are driving forces for mechanical innovation.

Innovation and new pieces of equipment are continuing to “shake up” the industry, Stoddard noted. In a typical operation, it takes two passes in sweet potato fields to eliminate excess vines leading up to harvest. Stoddard said that the new machine is capable of removing vines pre-harvest in just one pass.

“It helps get rid of the extra little vines that are still left over after you flail mow the crop,” he explained.

Although this machine is costly, according to Stoddard, it is estimated to save about one person per harvester, which in the big picture can add up.

“It’s a little tweaking of the system, which will make sweet potato harvest more labor efficient.”

2018-10-31T15:19:52-07:00October 31st, 2018|

California Sweet Potatoes are One of A Kind

California Sweet Potatoes Grow in Well-Drained Soil

By Jessica Theisman, Associate Editor

California sweet potatoes are in full harvest, and our potatoes are one of a kind, said Scott Stoddard a UCANR Cooperative Extension farm advisor for vegetable crops in Merced County. The difference is the sheen.

Scott Stoddard

“Sometimes they come up clean out of the ground because we’ve grown them in a very loose sand, so the sand just falls off of them, and it almost leaves some shine,” he said.

You can get what is called the California Sheen.

In a lot of other areas of the country, there is a little bit of mud and a little bit of silt. The crop they’re digging up is growing in the ground and kind of looks like it needs to be washed.

“A lot of times with California sweet potatoes, they don’t even look like they need to be washed when they come up out of the ground. It looks like they can just go straight from the field to fork,” Stoddard said.

Well-drained soil is important. Well-drained soil is what they grow best in.

“Not like a cactus where they can survive on no water, but we can get by in about two and a half acre feet. That’ll give you a good 100 percent potential yield,” Stoddard explained.

2018-10-24T16:15:13-07:00October 24th, 2018|

Livestock Owners Asked to Weigh in on Fire Impact

Livestock Owners Should Participate in Fire Survey

By Pam Kan-Rice, UC Agriculture & Natural Resources

Preparing a farm for wildfire is more complicated when it involves protecting live animals. To assess the impact of wildfire on livestock production, University of California researchers are asking livestock producers to participate in a survey. 

People raising cattle, sheep, goats, poultry, swine, horses, llamas, alpacas, aquaculture species or other production-oriented animals in California who have experienced at least one wildfire on their property within the last 10 years are asked to participate in the FIRE survey.

“We will aim to quantify the impact of wildfires in different livestock production systems,” said Beatriz Martinez Lopez, director of the Center for Animal Disease Modeling and Surveillance in the UC Davis School of Veterinary Medicine. “The idea is also to create a risk map showing areas more likely to experience wildfires with high economic impact in California.

“This economic and risk assessment, to the best of our knowledge, has not been done, and we hope to identify potential actions that ranchers can take to reduce or mitigate their losses if their property is hit by wildfire.”

Martínez López, who is also an associate professor in the Department of Medicine & Epidemiology at UC Davis, is teaming up with UC Cooperative Extension livestock and natural resources advisors and wildfire specialists around the state to conduct the study.

“Right now, we have no good estimate of the real cost of wildfire to livestock producers in California,” said Rebecca Ozeran, UC Cooperative Extension livestock and natural resources advisor for Fresno and Madera counties. “Existing UCCE forage loss worksheets cannot account for the many other ways that wildfire affects livestock farms and ranches. As such, we need producers’ input to help us calculate the range of immediate and long-term costs of wildfire.”

Stephanie Larson, UC Cooperative Extension livestock and range management advisor for Sonoma and Marin counties, agreed, saying, “The more producers who participate, the more accurate and useful our results will be.”

“We hope the survey results will be used by producers across the state to prepare for wildfire,” said Matthew Shapero, UC Cooperative Extension livestock and natural resources advisor for Ventura and Santa Barbara counties, “And by federal and private agencies to better allocate funds for postfire programs available to livestock producers.”

The survey is online at http://bit.ly/FIREsurvey. It takes 15 to 30 minutes, depending on the number of properties the participant has that have been affected by wildfire.

“Survey answers are completely confidential and the results will be released only as summaries in which no individual’s answers can be identified,” said Martínez López. “This survey will provide critical information to create the foundation for future fire economic assessments and management decisions.”

2021-05-12T11:17:09-07:00October 18th, 2018|

2018 Cotton Crop Proceeding Well

Late Season Pests Can Be a Challenge

By Patrick Cavanaugh, Editor

The 2018 cotton harvest will be starting in the southern part of the Central Valley later this month, and some growers will be facing pressure from pests.

California Ag Today recently spoke about the topic with Dan Munk, a UC Cooperative Extension Farm Advisor in Fresno County specializing in irrigation crop nutrient management and cotton production systems.

“The crop looks very good and loaded with cotton bolls. We don’t have a lot of boll losses, and that’s a real positive thing, so very excited about the potential for fairly high yields in the 2018 season. The biggest concern right now is pest management, press pressures as we approach the latter part of the season,” Munk explained.

The main issue this time of year is the honeydew that pest leave on the cotton. Honeydew is the exudate extracted by the insect as it feeds on the leaves.

“Because we have the bolls on the plant that have opened, we now have exposed lint and need to protect that lint from stickiness that’s created from whitefly and the aphid honeydew, which is basically the added sugars that those insects that feed on the leaves of the plant, and they excrete them and deposit them on the lint,” Munk said.

Munk explained that the big concern right now is dealing with pest pressures in terms of whitefly and aphid—both sucking insects. “The problem right now [is] where we’re seeing pest pressures—particularly from whitefly as we get later in the season—will build in many fields.

There are several approaches to controlling whitefly and aphids. One is to deal with the eggs that they produced. And then there’s a certain class of materials to deal with the eggs.

“There’s another class of materials that deal with the juveniles—that early form of the insect—and then there are ways to control the adults,” Munk said.

“A number of insecticides have been applied to deal with those various levels of insect populations based on the individual field situation,” he explained.

2021-05-12T11:01:53-07:00October 3rd, 2018|

Karen Klonsky Dies, Thursday, Sept. 27

Klonsky Credited for CA Agricultural Cost and Return Studies

 

By Patrick Cavanaugh, Editor and Laurie Greene, Founding Editor

Editor’s Note: We extend our deepest condolences to Karen’s family. Below is our interview with Karen upon her retirement in 2015.

 

This is an exclusive interview with Karen Klonsky, UC Davis Cooperative Extension specialist emeritus, in the UC Davis Department of Agricultural and Resource Economics. Her expertise has been farm management and production, sustainable agriculture and organic agriculture.

CalAgToday: Congratulations on your recent retirement!UCANR 100 years logo

Klonsky: Thanks, Patrick. I retired on July 1, 2015, after 34 years. I started at UC Davis in ’81, straight from graduate school.

CalAgToday: What has been your primary research interest?

Klonsky: My primary research areas are c and organic agriculture. I have approached these subjects from several dimensions, including the economic feasibility of alternative farming practices, the size and growth of organic production in California, and factors influencing the adoption of alternative farming systems.

Karen Klonsky UC Cooperative Extension specialist

Karen Klonsky UC Cooperative Extension specialist

CalAgToday:  Wow, what a great career! I understand your interest in alternative farming systems began with your dissertation work comparing alfalfa systems with integrated pest management.

Klonsky: I studied agricultural economics in graduate school and started working with a professor in my department who had a joint appointment in agricultural economics and entomology. And I just became very interested in that research area.

I worked with entomologists and researchers on a computer model of plants and alfalfa weevils, and their interaction, plus a management component. I studied the plant and bug components, then did the management part and imposed it on top and asked, ‘If you did this, how many bugs would die?’ The plant model showed how much the alfalfa would grow, and at what point you could cut the alfalfa and achieve the desired yield. I never actually did any fieldwork.”

CalAgToday:  Since 1983, you not only directed ongoing Cost and Return Studies, but the development of an entire archived library of Cost and Return Studies for the UC Davis Department of Agricultural and Resource Economics. You recently completed studies on pistachios and walnuts, right?

Klonsky: Yes, both “Sample Costs to Establish and Produce English Walnuts In the Sacramento Valley, Micro sprinkler irrigated” and “Sample Costs to Establish and Produce Pistachios In the San Joaquin Valley-South, Low-Volume Irrigation.”

Our library contains studies about field, tree and vine crops and animal commodities. But since I retired, Dan Sumner, director, University of California Agricultural Issues Center and Frank H. Buck, Jr. Distinguished Professor for the Department of Agricultural and Resource Economics has taken that over and I continue to be peripherally involved.

CalAgToday:  These cost studies have been recognized worldwide.ARE Cost and Return Studies

Klonsky: Yes, and it has been very gratifying work. We decided to put them online routinely, and we have had a million downloads per year. Around 2005, Pete Livingston, my staff research associate, got the idea of scanning in the older studies. All of the newer studies were in electronic file format, so posting was easy. However, most of the older studies were paper copies, so we got a grant to scan and add them to our new online archive.

CalAgToday:  What was the most interesting thing about doing those cost studies?

Klonsky: I loved doing those studies. I really learned a lot because all cost studies are done directly with farmers we met through county farm advisors. I really got to know what farmers were thinking about and what their options were.

CalAgToday:  So those were real costs, not university costs?

Klonsky: Those were not university costs. The farmers tell us what equipment they will use, and then we calculate the cost of using their equipment—the fuel used to operate the equipment and the repair costs—with an agriculture-engineering program.

CalAgToday:  Do you have a math background?

Klonsky: Yes, I got my bachelor’s at the University of Michigan in mathematics. It was very helpful.

CalAgToday:  And you also earned your Ph.D. at the University of Michigan?

Klonsky: Yes.

CalAgToday:  So did you grow up in Michigan?

Klonsky: No, I grew up in New York.

CalAgToday:  And you had an interest in going to Michigan State University?

Klonsky:  I had an interest in agriculture because I had an uncle who farmed corn and vegetables in upstate New York. We would go up there and I thought it was the most wonderful thing in the world.

CalAgToday:  What were some of the highlights of your career?

Klonsky: For many, many years, I was involved in the long-term on-campus sustainable agriculture research on land that is now on Russell Ranch, but it started as Sustainable Ag Farming Systems. We looked at four different farming systems, organic, low input, high-input, and we did a lot of analyses with cover crops and rotations. It was great to work on that project.

CalAgToday: And you worked with USDA on the trends of organic farms?

Klonsky: Then I worked quite a bit with Department of Food and Agriculture on using the registration data for their organic farmers to compile statistics about how many farmers they had, what they grew, and the number of acres they planted with each crop. They had this database, which started in 1992 I believe, but they weren’t using it. Now the most recent registration analysis is available for 2012.

CalAgToday:  Just to try to get more data on the organic movement and organic growth?

Klonsky: Yes, because there was no data at all about it. Now NASS (National Agriculture Statistics Service) conducts a nationwide Organic Census, in addition to the regular Census of Agriculture.

CalAgToday:  I understand you served as an editor of the Journal of American Society of Farm Managers and Rural Appraisers (ASFMRA). What did that entail?ASFMRA

Klonsky: Yes. I did that for many years. ASFMRA is a national organization. The Journal of the ASFMRA comes out annually. As editor, I corresponded with the authors, assigned reviewers, and ultimately, accepted or rejected submissions, like any journal.

CalAgToday:  Did you travel a lot with your work and presentations?

Klonsky: You know, not so much, I went to Spain one time and France once for work. But I did travel around domestically to symposiums and conferences to speak on the economics of growing a lot of different crops, including many presentations at the EcoFarm Conference.

CalAgToday:  You worked and collaborated with some really interesting people.

Klonsky: Most of my important collaborations were conducting trials with people in other disciplines. For instance, at Russell Ranch, I was the only economist involved in the collaboration with plant pathologists and pomologists who ran trials to discover fumigation alternatives in the preplanting of trees.

Then I worked with people at UC Santa Cruz on alternatives for strawberry fumigation. Most of my work has been interdisciplinary.

CalAgToday:  California farming is a tremendously diverse industry. We produce 60% of the fruits and vegetables, and nearly 100 percent of the nut crops that people across the country consume. Any comments on that and on how, valiant and resilient farmers are to get through year after year, particularly lately with the drought and the lack of water deliveries?

Klonsky: When I first started, there was a land price bubble, and there were a lot of bankruptcies because people had these land payments they just couldn’t pay.

It was kind of like the mortgage crisis that housing saw in 2008, agriculture saw in the early 80s.

CalAgToday:  So as you have been editor for the Journal of the American Society of Farm Managers and Rural Appraisers, you see land values going up and that keeps agriculture strong—the high land values, right?

Klonsky: Well, but it keeps it expensive. So now there is more and more leasing of land. As farmers retire from permanent crops, they have an orchard, but they don’t really want to sell it, so they lease it.

CalAgToday:  There you go. Keep it somehow in the family.

Klonsky: Yes, they try to keep ownership in the family. Or what we see also are these development leases where a young farmer can’t afford to buy the land, so they lease the land, but they pay for the trees to be planted.

CalAgToday:  So you are still coming to your office at UC Davis?

Klonsky: I am officially retired, but we have what we call a ‘partial recall’ where you can do things if you have funding. I have a project along with Rachel Goodhue, Professor, UC Davis Department of Agricultural and Resource Economics, with the California Department of Food and Agriculture, funded through the California Department of Pesticide Regulation. The Department of Pesticide Regulations is required by law to do an economic analysis of all proposed new regulations. So that is what I am working on.

CalAgToday:  Give me a couple of examples. VOC regulations?

Klonsky: Yeah, we do VOC.

CalAgToday:  Are you looking at sustainable groundwater legislation?

Klonsky: No, just pesticide regulation. It is funded by the Mill tax on pesticides.

CalAgToday:  Did you work with a lot of graduate students at UC Davis?UC Davis Graduate Studies

Klonsky: Oh yeah, I worked with a lot of graduate students coming through. One of them was on different ways of pesticide management on eucalyptus trees. I said I went to Spain. On that trip, I spoke about growing eucalyptus for firewood.

CalAgToday:  That was an economic study, wasn’t it?

Klonsky: Yes it was. They grow it not for firewood, but for paper. But that never really caught on here.

CalAgToday:  Are you bullish on agriculture? Do you think Ag is going to continue thriving in California?

Klonsky: Oh, sure. Oh, sure. But I think that the water situation is definitely real, and I think agriculture already has definitely made tremendous strides in irrigation systems, especially the subsurface irrigation in vegetables, in particular processing tomatoes, which I worked on.

CalAgToday:  That was a huge improvement in growing tomatoes. And people didn’t think it was going to work, but it turned out to be fantastic.

Klonsky: Yeah, a really win-win on that one. And orchards are getting more efficient. If you look at the water per pound of crop produced, you see major improvements with water efficiency.

CalAgToday:  Absolutely. Of course, most plants transpire most of the water they take up through the roots, up through the leaves and the stomata cells. By the way, do you have any interesting stories regarding your career?

Klonsky: It’s not the highlight, but the weirdest thing of my career is I got an email from somebody in Ministry of Agriculture and Fisheries from the United Arab Emirates. They wanted me to give a live presentation about Cooperative Extension in California and how it’s organized.

So I had to go to this office building in downtown Sacramento at 10:00 at night because of the time difference. I went into a conference room that had a special kind of projector so I could see them and they could see me. And on the monitor I see all these men walked in—they were all men—and half of them were in Western dress and half of them were wearing a Sheik-like headdress, with a band that sits on top and holds it on.

That was crazy, just being downtown after everybody is gone and the whole building was dark and quiet, except the one room that I was in.

CalAgToday:  How long was the presentation?

Klonsky: Gosh, maybe an hour.

CalAgToday:  You needed to do some research for that presentation?

Klonsky: Yeah, I had to do some research, I had to think about Cooperative Extension in a different way—the big picture. 

CalAgToday:  Keep up the good work, and I hope you are enjoying retirement.

Klonsky: Yeah, I come in two days a week, so it is nice to see everybody. I still get a lot of emails, which I need to answer.

2018-10-02T20:13:53-07:00September 29th, 2018|

Idea to Reduce Glyphosate Use with Grapes

Use Glyphosate When Absolutely Needed

By Mikenzi Meyers, Associate Editor

There is an effort underway to minimize glyphosate use before bud break in grapes. It doesn’t need to be used all the time. A lot of annual weeds can be controlled with several herbicides. Keep the glyphosate for hard to control perennials.

John Roncoroni, a UC Cooperative Extension Weed Science Farm Advisor in Napa County, has made strides toward meeting this challenge. Many times, growers will do two applications of herbicides during the year … but what I’m trying to do is push it back to post-leaf fall after the season to clean up and come back with a pre-emergent material right before bud break then maybe skip that last glyphosate treatment after bud break.

Roncoroni explained that the idea is for grower not to use glyphosate on weeds during the growing season.

Reserve Glyphosate for tough weeds such as field bindweed.

Roncoroni mentioned that he works with school districts and municipalities, and there are many of them want to ban the use of glyphosate.

“It’s not so much the glyphosate molecule; it’s that we have all used so much of it over the years,” he said. “Rely on preemergent materials early in the season and reserve glyphosate as a clean up at the end of the season.”

“My philosophy when I talk to people is to not ban it but to save it for needed use. Maybe we pretend that there are no herbicide alternatives available. We have annual grasses that are easy to kill, then use an alternative herbicide for that. But when you have weeds where you need that systemic benefit of glyphosate, then use it. It is a good molecule, and it has an important fit in weed control, but it does need to be used all the time,” Roncoroni said.

And of course, reading and following the herbicide label will maintain its safety.

2021-05-12T11:01:53-07:00August 23rd, 2018|

Spotted Wilt Virus Light This Season on Tomatoes

Thrips Widespread But Yields are High

By Patrick Cavanaugh, Editor

Spotted wilt virus on tomatoes was a big concern at the beginning of the season. California Ag Today spoke with Tom Turini, vegetable crops farm advisor for the University of California Cooperative Extension in Fresno County, about the topic. We caught up with him on the west side of Fresno County. He said despite the potential virus pressure, tomato yields have been very high this year.

“Thrips are the vector of tomato spotted wilt, and while the thrip distribution is much wider than it was last year, it doesn’t look like we’re seeing the level of economic damage,” Turini said.

Tom Turini

“We had had concerns initially about problems, and of course that could get worse as we get later in the season, but so far our yields have been very, very high,” Turini said.

He explained that the strong yields is in part due to the mild temperatures during the spring, so there was good early fruit set. “Even that, I would expect that now with these higher temperatures over the last six weeks, we’re going to start seeing the effects of the yield-robbing virus with a later harvest, he said.

Last year, the concern was with fresh market tomatoes.

“We had concerns late last year in the fresh market, but this year it’s at moderate levels of economic impact. “It doesn’t mean it couldn’t happen in the future, but at this point, it looks like we were spared, at least for the early season crop.

2021-05-12T11:01:53-07:00August 15th, 2018|

Navel Orangeworm Pressure Could Be Increasing in Almonds

Lack of Good Sanitation Leads to High Navel Orangeworm Numbers

By Jessica Theisman, Associate Editor

It could be another heavy year for Navel Orangeworm (NOW). David Haviland, UC Cooperative Extension farm advisor for Kern County and entomologist told California Ag Today that sanitation in almond orchards over the winter was not as good as it could have been.

“Everything right now is about trying to prevent a repeat from last year, and it is a little tricky so we know that sanitation wasn’t as good this winter as it generally should be,” he said. “The best time to shake NOW mummy nuts from an almond tree is after a rain when the nuts are heavier.”

David Haviland on Pyrethroid Review

David Haviland

However, rains came late this season, and by the time the rains left, there was only a few weeks before spring.

“This left a very short window to get any shaking done, and some people did an excellent job during that window to sanitize and other people just couldn’t get around all their acreage,” Haviland said. “On average across the whole industry, sanitation was not up to where it should have been, and it gave growers a difficult start to the season.”

NOW could be early this year, but the crop is on time.

“With all of this prolonged hot temperatures, particularly high night-time temperatures, the trees are shutting down a little bit at night compared to what they would do if the nighttime temperatures were cooler,” Haviland explained.

As a result, harvest is not coming as quickly as people would like.

“The problem is that the longer the nuts are in the orchard, the greater chance there will be NOW damage,” he said.

Timely crop protection sprays are recommended.

2021-05-12T11:01:53-07:00August 7th, 2018|

Spotted Wilt Virus Impacting Tomatoes Again

Virus has Gotten Past Resistant Gene

By Patrick Cavanaugh, Editor

Tomato spotted wilt virus is becoming big in the central San Joaquin Valley, according to Tom Turini, University of California Cooperative Extension Farm Advisor in Fresno County for vegetable crops. The virus had earlier been spotted in lettuce, and this has caused some concern in this season’s tomato crop.

Tom Turini

“We had some concerns early in the season that we might be looking at a year where it’ll become a challenge, because we were finding it in lettuce back in February and March in the Huron area,” Turini said. “And then we notice that tomatoes were showing the virus symptoms. We had been managing tomato spotted wilt in processing and fresh market tomatoes largely with a resistance gene, and it seemed that the resistance was breaking.”

The virus is spread by thrips, and the gene in the tomato was the biggest deterrent in combating thrips.

“We were also talking about an IPM program, but the industry was leaning on this gene. This gene became a big part of their spotted wilt prevention program,” Turini said. “While sanitation of weeds was practiced, and there was some thrips management, it was really dependent upon this single gene resistance in the tomatoes, and as of 2016, we saw evidence that that gene was no longer performing.”

Because the virus can wipe out entire tomato fields, researchers are scrambling to find a new way to deter the thrip spreading the virus on tomatoes.

2021-05-12T11:01:55-07:00June 18th, 2018|

Citrus Psyllid Control Strategy Changes

Reducing Sprays in Areas, and Border Nets

By Jessica Theisman, Associate Editor
beth_grafton-cardwell

Entomologist Beth Grafton-Cardwell

Huanglongbing, vectored by the Asian Citrus Psyllid, (ACP) is the dreaded disease that has nearly wiped out the Florida citrus industry and is a potential problem for citrus growers in California. California Ag Today recently met with Beth Grafton-Cardwell, a UC Cooperative Extension Specialist. She specializes in integrated pest management; she discussed new strategies for the control of HLB.

“We have been surveying grower orchards in southern California and following how pesticide sprays are working, and I’m going to make some new recommendations on how to handle the populations down there,” said Grafton-Cardwell, who is also the director of the Lindcove Research and Extension Center. “Some regions of Southern California are easier to control psyllids than others. The pesticide treatment is less intensive due to the desert climate. San Diego is one of the areas that is less intensive due to the drier trees making them more hardened off, with less new flushes, where ACP is attracted.”

“There are other areas of southern California where the trees flush continually, providing great places for the psyllids to lay eggs, and that is where treatments are going to have to intensify,” she explained.

Areas such as Ventura, Riverside, and San Bernardino have to increase their treatments in the fall for better control.

And researchers are currently studying new prevention and control methods.

“Texas A & M has been looking at erecting net-like borders around the orchards because the psyllid tends to go to the edges,” Grafton-Cardwell said.

They want to treat the netting with yellow strips of sticky paper that would attract and/or apply insecticides to kill the psyllid.

“Our research is showing that often the infestation starts on the borders. Growers may have to intensify the number of treatments, but they don’t have to treat the entire orchard,” Grafton-Cardwell said. “Growers might be able to fight the psyllid with only treating the trees on the outer edges.”

2021-05-12T11:05:12-07:00May 10th, 2018|
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