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|

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|

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|

Vegetables Are the Key to Great Nutrition

How to Increase Fruit and Vegetable Consumption

By Laurie Greene, Editor

In honor of National Eat Your Veggies Day, we spoke with Francene Steinberg, department chair and professor of nutrition at UC Davis, and director of the UC Davis Dietetics Education Program for undergrads. She encouraged the importance of leaning on vegetables for optimum nutrition and health benefits.

Francene Steinberg, department chair and professor of nutrition at UC Davis

“A varied diet of fruits and vegetables, along with grains and some protein sources is extremely valuable to give everybody the best energy for them to grow,” Steinberg said. “It really is so important to get the full spectrum of all the nutrients in these foods, particularly the vegetables.”

“In addition to all the required nutrients,” she explained, “we know the required vitamins and minerals—those that we know about and for which we have the Recommended Dietary Allowance (RDA), the “average daily level of intake sufficient to meet the nutrient requirements of nearly all (97%-98%) healthy people.” (Source: National Academies of Sciences, Engineering, and Medicine)

Continuing, Steinberg said, “There are also quite a few other nutrients and compounds in those foods that are good for us—that have biologic effects. Not only just fibers, but also phytochemicals, phytonutrients, they are really part of what helps to promote overall health. It’s not just the vitamins and minerals in a vitamin pill. You really need to eat the whole fruits and vegetables and grains, and so forth, to get the full effects,” noted Steinberg.

There is a new approach to how much produce people should eat on a daily basis. Steinberg noted the importance of eating the rainbow; fruits and vegetables of every color. Previous nutrition campaigns used to stress the importance of consuming five servings of fruits and vegetables each day.

“Most people don’t even come near to eating the amount of vegetables they need. Rather than focusing on a specific number, an easier goal is just eat more than you currently do, in terms of vegetables. Eat one more serving each day. Try a new vegetable each week. See if you like them,” said Steinberg.

Eat The Rainbow

In particular, Steinberg recommended red beets which are a wonderful vegetable to add to your eating list. “Beets are delicious. These deeply colored fruits and vegetables—whether they’re red, or green, or orange—that really denotes they have more nutrients in them. There are all these colored compounds that are often bioactive in the body. They really are good for you. You can, as you say, eat the rainbow by choosing these brightly colored fruits and vegetables.” noted Steinberg.

Steinberg encourages consumers to ‘”eat the rainbow.”

By consuming more vegetables, consumers can more avoid many chronic diseases. “I think that certainly most of the chronic diseases we suffer from today stem from obesity, diabetes, heart disease, that sort of thing,” Steinberg commented. “They’re often a combination of overconsumption of overall calories and empty nutrients, and not enough consumption of some of these fruits and vegetables that hold such valuable nutrients for us,” said Steinberg.

“It really is a matter of trying to make your diet as nutrient-rich as possible, and really avoiding those empty calories that seem to provide us lots of extra calories without any added benefit,” she stated. “If folks can cut down on some of the sugary and highly fatty snacks, chips and that sort of thing, and eat a piece of fruit or an extra vegetable serving per day they’re really much better off.”

Steinberg suggested one way to stimulate the desire to eat more vegetables is by making them readily available. “I think sometimes when people buy some of the produce, then they put it away in the refrigerator, it’s not visible. It’s hidden and they go to the cupboard and look and there’s a bag of chips that’s very easy to grab.”

She also recommended ways to make sure produce is not left behind. Consumers can purchase “fruits and vegetables that are already pre-washed and cut up, and put them in a little baggie or bowl on the counter, if they’re not perishable, or just a baggie in the refrigerator. It’s a quick grab and go. You can take it and have it as a quick snack. Things that are appealing to children are small bites that are easily consumed, bright and colorful.”

Steinberg recommended consumers “try to find those fruits and vegetables that are very fresh. Sometimes the ones we find in the grocery stores are not as flavorful as [backyard-grown], from the farmer’s market, or even just knowing which vegetables are in season. At the grocery store, the best things that are in season are usually going to be the freshest and tastiest. ” said Steinberg.

Fresh is not the only way consumers can enjoy the benefits of produce since frozen varieties are easy to come by. “Some of the frozen whole vegetables and fruits are highly nutritious,” said Steinberg. “They’re very affordable and available year round.”

Steinberg also mentioned the availability of low calorie dips such as hummus can easily be found in grocery and convenience stores which encourages more fresh vegetable consumption. In fact, hummus is primarily chickpeas, another great vegetable. “Dipping fresh vegetables in hummus. That’s delicious,” she said.

California Ag Today2016-10-24T15:54:25-07:00June 17th, 2016|

Bill Chandler on Farming

Bill Chandler Builds a Legacy

By Patrick Cavanaugh, Deputy Editor

A third-generation farmer in Fresno County, Bill Chandler farms near Parlier, Selma, and Fowler. The family operation has traditionally produced tree fruit such as peaches, plums and nectarines, but they are certainly expanding their crop diversity. “We have gone more into almonds lately because of unavailable labor,” Chandler commented. “We are looking into citrus, which is not as perishable as soft fruit—which, if you don’t harvest it right away, you’ve lost the whole year’s effort.”

Like so many farm families in California, the Chandlers go back a couple of generations farming here. “My grandfather came out here in 1888 from Illinois,” Chandler expounded, “and looked at this area. It was appealing because the land prices were not that bad compared to Illinois. But the big deal was the weather; we don’t have all that snow in the winter time. We also have relatively level ground and not a lot of rocks in our soil. We, too, have hardpan under the soil, but that can be worked out.”

“My father got out of school in 1921 and started farming in this area,” said Chandler. “I was the only son and I always wanted to farm. I have a sister who was able to inherit some, and I bought my sister out, so that’s what our farm is now.”

Bill Chandler and his wife, Carol, have two sons, Tom and John, who are both back on the farm. “They both majored in ag, which was kind of neat; one in ag econ and the other in food science, and we are very proud that they are both back farming with us now. Tom, the older one, majored in ag econ at UC Davis and was in banking for about 12 years. Now he has come back and has been helping us on that side of the farming, which is very very important. He also did some land appraisal on the side. His brother, John, who majored in in fruit science at Cal Poly, is more into field work, and he does some beekeeping on the side as well.”

Chandler said a lot of success and wonderful things about farming have always been accompanied by a lot of challenges as well. “Yeah, there is always something,” he said. “I don’t care if it’s labor, weather or regulations. We are really fortunate; we stand at a place here, Kearney Field Station*, where the UC has done a great job helping us solve some of these regulations or pests.”

Chandler’s sons, Tom and John, are going to pick up where their dad leaves off, but that may be awhile, “You know,” Chandler philosophized, “a farmer never does retire. Fortunately, I am able to live on the farm. They are doing most of the farmwork, but they do ask me questions.”

This year’s above-average rainfall, along with the snowfall, has been great, but Chandler said, “There is still going to be a lot of work to dig ourselves out of this four-year drought. I have experience and so do many other people. Not only are our trees suffering from lack of proper irrigation, but we are spending a lot of money putting in new wells or new irrigation systems so that we can handle this drought.”

Chandler doesn’t take nearby UC and USDA researchers for granted. He always attends meetings and takes notes. “We can go to these folks and have these seminars that are really helpful.”

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*Kearney Agricultural Research and Extension (KARE) Center

California Ag Today2016-05-31T19:24:07-07:00April 12th, 2016|

PCA Training At UC Davis

UC Davis Offers Pathway to PCA Training

By Laurie Greene, Editor

Frank Zalom, distinguished professor of entomology, agricultural experiment station entomologist, and extension specialist at UC Davis, teaches a class for students that forms a pathway to becoming a Pest Control Advisor (PCA). “It is the only class that a lot of them had ever taken in entomology,” said Zalom, “so we try to structure it to give them a good, solid background in entomology. Then we lead them through all the different pest management options. We even bring in someone from the California Association of Pest Control Advisors (CAPCA) Pathway to PCA program for the very last lecture.”

Zalom, whose research interests include integrated pest management (IPM), tree crops, small fruits and vegetable crop entomology, wants to provide a valuable education to his students. “Most of the kids taking my classes are interested in taking the PCA exams and there is a huge opportunity for those students out in the future.”

“We teach them about integrated pest management (IPM) and the pests,” Zalom noted. “Then we show them some of the many career opportunities for PCAs,” he said, adding. “There will always be a big need for professional PCAs to help protect our crops from pests and diseases. They assist growers all over the state.”

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Links:

California Association of Pest Control Advisors (CAPCA)

CAPCA Pathway to PCA

California Ag Today2021-05-12T11:03:03-07:00February 24th, 2016|

Dairy Prices Still Low

UC Davis’ Bees Butler on Low Dairy Prices

By Laurie Greene, Editor

As previously reported, the dismal below-production-costs dairy prices in California—the #1 dairy state—as well as in the rest of the nation, emanate from excessive inventory and slumping sales, particularly in the export market.

Leslie (Bees) Butler, a UC Davis Cooperative Extension specialist and lecturer in the Department of Agricultural and Resource Economics, explained why dairy producers don’t cut back on milk production. “It is easier said than done,” he said, “and for many producers, it comes down to an income problem. Most production units are set up on a certain sort of ‘scale,’ if you like. So if I am all set up ready to milk, let’s say, 800 cows, or 1000 cows, and then you come along and tell me, ‘Well, you ought to reduce it a bit.’”

“Quickly, I, the dairyman, have to think of what I can do,” said Butler. “There may be a couple of things I can do. First, I can get rid of some cows, my lowest producing cows. You can do that, but it would be a temporary solution to the problem. The second is don’t add those high-producing heifers back into the herd, but they are the most efficient cows. So as you do add them in, you have to cull more lower-producing cows. Many heifers are much better producers than their mothers, so it just reduces the lifecycle of the poor mom.”

“And of course, cash flow in the dairy business is so important,” emphasized Butler. “You know there is a limit to how much a dairy farmer can reduce his income without impacting too seriously his ability to pay off loans, etc.”

California Ag Today2021-05-12T11:17:14-07:00February 17th, 2016|

Youth in California Cattle

By Charmayne Hefley, Associate Editor

Statistically, it appears millennials aren’t considering agriculture as a career path. The USDA’s “2007 Census of Agriculture: Farmers by Age,” reports the average age of cattle ranchers was 57.8 years old. Malorie Bankhead, director of communications for the California Cattlemen’s Association (CCA) and a millennial herself, said, “Young people in the beef industry have a really unique opportunity to get involved in something called the Young Cattlemen’s Committee (YCC), the young affiliate of our California Cattlemen’s Association.

Young Cattlemen’s Committee (YCC)

Bankhead explained, “There are four college chapters: Fresno State, Chico State, Cal Poly and UC Davis. We don’t discourage membership from high school students or even folks younger than that who are interested in getting involved. The membership is $25 per year, and with that, you’re afforded a wealth of opportunity to become involved. We have a fairly robust scholarship program available to YCC members where we interview up-and-coming leaders in the beef industry who are focusing academically and extracurricularly on the beef industry, with the career goal to reenter the beef industry.”

Bankhead said the Young Cattlemen on the Capitol event, set for April 5, “is another opportunity for young people in the industry—specifically YCC members—to come to the CCA office in Sacramento to to learn from our staff about the current hot topics in the beef industry affecting ranchers. We turn to discussions with those folks and each other and build your network in the beef industry. We also tour the Capitol, visit some legislators and network with them on issues impacting the beef industry.” Registration information is forthcoming on the CCA website under the YCC tab.

Patrick Cavanaugh2021-05-12T11:17:14-07:00February 15th, 2016|

EPA on Agriculture, Part 2

Ron Carleton, EPA on Agriculture, Part 2

By Laurie Greene, Editor

Editor’s note: In an exclusive interview with Ron Carleton, EPA Counselor to the Administrator for Agricultural Policy, we asked how the EPA views agriculture.

“Look, we want to work with agriculture,” said Ron Carleton, former deputy commissioner for the Colorado Department of Agriculture. “We have a number of issues and challenges we face across the country with water quality and other things. The thing that we often talk about is the adoption and implementation of conservation measures and best practices, and our producers are doing that,” he noted.

“Farmers are taking those very important steps,” explained Carleton, “to help get us from here to there. EPA Administrator Gina McCarthy is very committed to working with agriculture, to have that dialogue, to have that discussion, to have those two-way communications. So, hopefully, we can work better together as we go forward and find those opportunities to collaborate and to partner. That is so key, and something that I strongly am committed to and strongly support.”

Ron Carlton, EPA Counselor to the Administrator for Agricultural Policy

Carleton elaborated, “I absolutely believe the EPA is always willing to look for outreach opportunities to be with our producers to sit down, to have those discussion with farmers,” towards a common goal.

“We’ve worked with our pesticide folks around the state very closely to resolve any issues that might arise with pesticide issues. We want to get those tools and those products out to our producers, but to do so in a safe way, in a way that also protects the environment. So, I think it is about collaboration. It is about discussion and dialogue, and we are committed to doing more of that.”

With the EPA’s commitment to collaboration and partnership, Carleton said hopefully in the long run, we could address the many challenges that we all have—not only in agriculture—but in the environment as well.

“I’ve always said that our farmers and ranchers are the best stewards of the land,” said Carleton. “We at the EPA need to continue working with them to support them to promote those efforts as best we can.”

“Now, we are not without challenges out there—environmental challenges with water quality, for example, with nutrient pollution in some cases, and air issues in other cases. But I think that the way we lick those problems, again, is by working together promoting those voluntary efforts. We must look for and embrace those opportunities to work together, not only with our Ag stakeholders, but also with the USDA and the NRCS.

“I think we just need to continue what we are doing, engage even more farmers and ranchers,” Carleton said, “and continue to seek technological advances, not only in irrigation, but land management and water quality. I’m confident and I’m optimistic that even with the challenges we have, climate change, a doubling of the population by 2050 and all the problems these will pose, I have every confidence in the world that we are going to find solutions to these problems, and I think that our farmers and ranchers are going to lead the way.

“Farmers and ranchers are innovative and always trying to do the best they can to protect their land and water; but we all can do better. I think our producers respond to change in very good ways. Look, we have gone through technological advances; we are more technically precise in using fertilizers and water,” Carleton said.

He noted, “Water is going to be an interesting issue as the population doubles and as we have more development, particularly in the Western part of the United States, which is drier. But I think our farmers and ranchers are good at responding to that change, and good at helping to develop, adopt, and implement those technical advances in a way that not only is environmentally good, but increases productivity.”

“They are doing more with less,” Carleton said, “particularly given the challenges of a growing population, not only here in this country, but around the world, the loss of productive agricultural land everyday to development and the increase in extreme weather events, including droughts, floods and the like—and California farmers know all too well the weather extremes.”

California Ag Today2016-05-31T19:24:12-07:00February 12th, 2016|

Greg Douhan is New Citrus Farm Advisor

UCCE Tulare Welcomes New Citrus Farm Advisor

By Brian German, Associate Director

The UC Cooperative Extension Program has served Tulare County since 1918 and continues to meet the ever-changing needs of the community. UC Cooperative Extension, Tulare County is preparing to welcome their new citrus farm advisor, Greg Douhan, on March 1, 2016. Douhan, who noted his excitement for the opportunity, will be taking the reins from the recently retired Neil O’Connell who gave over 34 years of faithful service advising Tulare County citrus growers.

Douhan shared that his relatives inspired him to focus his career in agriculture. “I had an uncle who was an almond grower when I was a kid. And my grandfather was an avid horticulturalist; he used to graft different trees and I always found that fascinating.”

“As I got older, I decided I was interested in plants, so I went to Humboldt State University. I also got interested in fungi, so I decided to fuse my interests in fungi and in plants and go into plant pathology,” Douhan said.

“I earned my Master’s and Ph.D. at Washington State University, and then completed a post-doc assignment at UC Davis for 3-4 years. I moved to UC Riverside for about 6 years. Now I am here in Tulare County!”

Cooperative Extension advisors serve as conduits of information from various UC campuses. Subject matter specialists, along with local research centers, collaborate with local advisors to identify and solve local problems through research and educational programs. The mission of the program is to serve California through the creation, development and application of knowledge, in agriculture, natural and human resources. Farm advisors then apply this knowledge to improve our agriculture and food systems along with our natural resources and environment.

“I’ve been working for the UC system basically since I was a post-doc,” Douhan said, “so it has been for many years. I think Cooperative Extension was the best system for working with both the growers and everybody else to better California agriculture,” Douhan said. “This was just an incredible opportunity. I was doing science and looking for another career move, and this was a perfect opportunity to have a next chapter in doing something different.”

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