Posts Tagged: Alejandro Del Pozo-Valdivia
When Alejandro Del Pozo-Valdivia started his new job as UC Cooperative Extension entomology advisor in the Salinas Valley last year, he immediately faced an urgent problem in organic lettuce production.
Pest control advisers were finding lettuce aphids in plants that were supposed to be resistant.
Because lettuce aphids crawl deep within the heart of the lettuce head, and because organic growers do not have many options for chemical pest control, the industry relies on patented lettuce varieties that have been conventionally bred to be unpalatable to the pest.
“With other types of aphids, they stay on the outer leaves. When you harvest and clean the head, you are taking the aphids out,” Del Pozo-Valdivia said. “But with the lettuce aphid, it's almost impossible to remove them. We don't want consumers to buy a lettuce with these tiny red insects inside.”
Organic producers pay a premium for resistant seeds to grow lettuce without the lettuce aphid and are mystified by the sudden appearance of the pest inside lettuce heads. Has the aphid developed the capability to feed on resistant varieties? Is there a different lettuce aphid biotype in the area? Since Del Pozo-Valdivia is an entomologist, he is focusing on the pest.
With funding from the California Leafy Green Research Board, Del Pozo-Valdivia and his co-principal investigator, USDA scientist Jim McCreight, have launched a research project to collect and identify the lettuce aphids that are feeding and reproducing in the resistant lettuce in the Salinas Valley.
“I'm asking growers and PCAs to contact me if they find any red aphids in resistant lettuce so we can confirm the type of aphid,” Del Pozo-Valdivia said. “
Seed companies that hold the patent on resistant lettuce also experienced broken resistance in Europe a few years ago, Del Pozo-Valdivia said. They found that the pest in Europe was a different biotype and are already working on identifying genes to maintain the lettuce aphid resistance.
“We haven't seen any scientific report for the U.S. That's why we decided to take the lead. To take the bull by the horns and identify the aphids here in the Salinas Valley,” Del Pozo-Valdivia said.
How One Entomologist Found His Calling as an IPM Facilitator
(Entomology Today) Lina Bernaola, April 18
Alejandro Del Pozo-Valdivia, Ph.D., is currently an IPM entomology advisor at the University of California Cooperative Extension. He serves the vegetable industry in the Central Coast region of California by conducting applied research on pest management and implementing an extension program for stakeholders.
Alejandro was born and raised in Lima, Peru, where he earned his bachelor's degree in agronomy from La Molina National Agrarian University. Then, he went to Washington State University, where he obtained his master's degree in entomology working on integrated pest management (IPM) in irrigated hybrid poplars. In 2016, he obtained his Ph.D. in entomology at North Carolina State University (NCSU). During his doctoral studies, he worked on proposing management practices for the kudzu bug, an invasive pest of soybeans.
America's leading animal geneticist wants to talk to you about GMOs
(Pacific Standard) Emily Moon, April 18
At 11 a.m. on a Thursday morning, Alison Van Eenennaam is sitting in a harshly lit lab room, surrounded by her graduate students, talking about cattle sex—sex that, unfortunately, has not gotten anything pregnant. With the gene-editing techniques she's using, there could be many factors to blame: the location in the DNA strand of the edit, the biopsy performed to check the results of the edit, the freezing and the thawing of the embryo, the embryo's journey from lab to farm in a thermos. Now, Van Eenennaam floats another idea. "No foreplay, the poor guy," she says, a cheeky grin on her face. "The candle and the lighting wasn't right."
UCCE Marin Creates Online 'Story Map' Annual Report
(Patch) Susan C. Schena, April 16
The University of California Cooperative Extension team in Novato has created an online "story map" that capsulizes in an interactive way its ongoing programs and key 2018 accomplishments, instead of a written annual report.
An Inviting Summary of UCCE Marin's Exploits
Why bees swarm and what you should – or shouldn't – do about them
(San Jose Mercury News) Rebecca Jepsen, April 16
…Last year was a particularly bad year for honey bees. Some bee keepers reported up to a 90 percent loss in their hives in 2018. Causes for this include varroa mite infestations, increased pathogens due to the warm weather, increased use of pesticides and a decrease in diversity of food sources.
So, what can we do about a swarm? “If you leave the bees alone, they will leave you alone.,” said Dr. Elina L. Niño, honey bee expert at UC Davis. “It only takes a few hours or at most a day or two for them to find and settle into their new home.”
Santa Maria expects big strawberry crop
(The Packer) Carol Lawrence, April 16
…Two of the three top-yielding varieties in production yield studies conducted in Watsonville by the University of California, Davis, include the monterey variety, producing 10,554 cartons per acre, and the san andreas variety, which yielded 10,414 cartons per acre. O'Donnell said the commission has noticed those varieties as well as some proprietary ones from growers.
“We're seeing more fruit per acre from when these fruits are planted,” she said.
A newer variety, the cabrillo, was reported as producing 11,605 cartons per acre in recent tests.
These California communities could be the next Paradise. Is yours one of them?
(Sacramento Bee) Ryan Sabalow, Phillip Reese and Dale Kasler, April 11
…“There's a lot of Paradises out there,” said Max Moritz, a fire specialist at UC Santa Barbara.
California's state-of-the-art building codes help protect homes from wildfire in the most vulnerable areas, experts say. But the codes only apply to new construction. A bill introduced by Assemblyman Jim Wood would provide cash to help Californians retrofit older homes.
“This will go a long way toward these different municipalities (in showing) that they deserve funding,” Moritz said.
U.C. Davis Animal Science Professor Discusses Agriculture's Contribution to Climate Change
(Cornell Sun) Stacey Blansky, April 11
On Monday afternoon, Prof. Frank Mitloehner, animal science and Air Quality Extension Specialist at the University of California, Davis, discussed the latest research surrounding animal agriculture and its “surprisingly modest” contribution to global greenhouse emissions. Mitloehner pointed at food waste as the largest contributor to environmental damage.
Scientists studying smoke taint as next fire season approaches
(Farm Press) Lee Allen, April 10
…A Los Angeles Times report on the subject put it this way - “Smoke taint rears its head when grapes, kissed by environmental smoke as they're growing, eventually yield a wine with unexpected smoldering flavors…, ‘like drinking from a well-used ashtray,'” using the words of University of California-Davis enology specialist Anita Oberholster. The story noted: “It's a vintner's worst horror movie nightmare - the smoke is coming from inside the grapes.”
Says Oberholster: “Compounds that are responsible for smoke taint are naturally present in grapes at low levels, they add complexity to the wine. Research into the subject is a slow process and to date, I can say there is very little you can do to prevent extracting smoke taint compound from grapes. We are currently in the process of evaluating different amelioration techniques from finished wines and there is some promise there, but research is still on-going, and I have no data yet.”
The farmer that saw his budding California tea farm go up in smoke
(San Francisco Chronicle) Jonathan Kauffman, April 8
…What Mike Fritts didn't know in 2010 — what almost everyone had forgotten, in fact — was that the UC Extension Service planted California's first modern test plot of Camellia sinensis in Fresno in the 1960s, when it partnered with Lipton.
Jacquelyn Gervay Hague, a chemist at UC Davis who conducts studies of tea-growing in Taiwan and is active in the university's Global Tea Initiative, said she learned about the plots just a few years ago when the director of UC Extension's Fresno office gave her a call.
“It blew my mind,” Hague says. She pored over the records, which covered 1963 to the early 1980s, when Lipton pulled out of the study. “It was concluded that we could grow tea very well,” she said.
Goats are the latest weapons in the war against wildfire
(CNN) Sarah Lazarus, April 8
… Lynn Huntsinger, professor of range ecology and management at the University of California, Berkeley, says that California has seen an increase in "fuel" -- the term fire experts use to describe "dead plants."
Huntsinger, who used to keep goats in the backyard of her Bay Area home, says the fire problem has its roots in history.
In the past, Native Americans lit fires to control the vegetation, she says. These deliberate burns created a landscape of open grasslands, so wildfires were smaller and less frequent.
That changed with the arrival of colonial settlers. They did not understand how "using fire prevented fire," and banned deliberate burns from around the turn of the 20th century, says Huntsinger.
The Age of Robot Farmers
(The New Yorker) John Seabrook, April 8
…To get an idea of what might be possible, I arranged to visit Professor David Slaughter in his office at the University of California at Davis. Slaughter leads the university's Smart Farm Initiative, which explores how future farmers might employ emerging technologies. Drones, for example, can automate the inspection of fields for pest or weed outbreaks, and can use high-resolution cameras and algorithmic processing of the images to pick up incipient problems before a farmer or a hired hand might spot them. Another possible application is plant breeding. Breeders currently rely on humans to evaluate seedlings produced by new combinations of already existing varieties.
…If the future of fruit-and-vegetable farming is automation, farmers will not only need the machines, and the funds to afford them, they will also require a new class of skilled farm workers who can debug the harvesters when something goes wrong. Mary Lou de Leon Siantz, a colleague of David Slaughter's at the University of California at Davis, is trying to ensure that domestic farmworkers' children have the STEM skills to compete for those jobs. De Leon Siantz is the daughter of Mexican immigrants; she has a Ph.D. in human development and focusses on migrant health in her research. She hopes to use existing Head Start and 4-H programs to teach math and engineering.
Regional sustainable groundwater management forum hosted in Corning
(Red Bluff Daily News) Julie Zeeb, April 5
Tehama and Butte counties teamed up Friday to host a Northern Sacramento Valley forum on sustainable groundwater held at Rolling Hills Casino.
The event was a collaboration between the Tehama County UC Cooperative Extension and Butte County Department of Water and Resource Conservation.
Allan Fulton, a Tehama County farm advisor, served as moderator.
“We're four years into Sustainable Groundwater Management Act that went into affect Jan. 1, 2015,” Fulton said. “There's been a lot of organizing (of groundwater management agencies). Now the governance structure and planning is underway. This venue is perfect for people to learn about the act and what is going on locally. It's a chance to see, as landowners and water operators, how to engage in the process and give feedback on what they think about it.”
The worst fire in California history illuminates fire preparation needs
(Yuba Net) April 5, 2019
Four months have passed since the Camp Fire, the worst wildfire in California history, ravaged bucolic communities in the Butte County foothills, including Paradise, Concow, Butte Creek Canyon, Cherokee, Yankee Hill and Magalia. Eighty-five people died, many of them elderly and unable to safely evacuate from an area where a wind-driven fire raced from home to home.
The unspeakable loss of human life and the serious challenges being faced by survivors has dominated the Camp Fire conversation. Now, UC Cooperative Extension is beginning a dialog with many agencies involved to understand how such tragedies can be prevented in the future.
UC course helps landowners track water use
(Farm Press) Tim Hearden, April 5
On a recent morning, Jim Edwards and about 70 of his fellow farmers and ranchers from Northern California went back to school. Each was handed a binder full of worksheets as they embarked on a three-hour course to learn how to measure and report their own water diversions – a state requirement now for landowners with rights to draw water from a river or stream.
There were lectures by University of California Cooperative Extension advisors and were even quizzes at the end of each unit so the landowners could demonstrate what they'd learned about open-ditch flow readings, measuring weirs, in-pipe flow meters, the calibration and accuracy of measuring devices, and measuring reservoir diversion quantities.
“I think it's great,” said Edwards, who takes water from Antelope Creek near Red Bluff to raise cattle, orchards and hay.
… “I think this is a good crash course to get people to understand flow measurements and what is required of them to report,” says Khaled Bali, a UCCE irrigation specialist who helps lead a course unit on device accuracy.
DIY with classes at the UC Cooperative Extension in gardening and food preservation
(New Times SLO) Camillia Lanham, April 4
A soft-hued planter full of pale gray-greens and purple flowers waits just through the gate of the Garden of the Seven Sisters off Sierra Way. Those winter colors will soon be replaced by flora made just for spring. This "curbside garden" is the first of 15 demonstration plots manned by Master Gardener Program volunteers at the UC Cooperative Extension in San Luis Obispo.
If you're a newbie like I am—or an oldie looking for some new tricks—the UC Cooperative Extension in San Luis Obispo County has got something just for you. Whether you're trying to figure out what to do with all of that extra produce on your kitchen counter or trying to decide exactly what to plant and when, there's probably a class for that either through the extension's Master Gardener Program or Master Food Preserver Program. You can become certified as a master and volunteer for either program or both programs, or you can dabble with a class here or there.
Backyard chickens hit hard by a long-gone, extremely contagious disease
(New Food Economy) Tove Danovich, April 4
In California, backyard birds are in lockdown. County fairs are canceling their poultry shows. Veterinary hospitals aren't accepting chicken appointments. Local 4-H leaders are telling chicken owners to keep their birds sequestered. Some poultry breeders are even worried their birds will need to be euthanized.
… There are approximately 100,000 backyard flocks in California according to Maurice Pitesky, Cooperative Extension poultry specialist with the University of California, Davis, School of Veterinary Medicine. “They don't focus so much on biosecurity, which is just a fancy word for disease prevention,” he says. Backyard poultry owners regularly mock the CDC's advice to avoid snuggling or kissing their chickens, but that's not the worst of it: 25 percent of urban poultry owners reported not even washing hands after handling their birds.
(Napa Valley Register) April 4
Dr. Monica Cooper, farm adviser of UC Cooperative Extension, Napa Valley, is the recipient of the American Society for Enology and Viticulture's (ASEV) Extension Distinction Award for 2019.
Cooper will receive the award at the 70th ASEV National Conference on June 19 in Napa, where she will be presenting, “Building Effective Extension Networks to Support Data-Driven Decision Making.”
It Wasn't Just the Soda Tax That Dropped Berkeley Soda Sales by 52 Percent
(The Inverse) Emma Betuel, April 3
University of California, Berkeley professor Sofia Villas-Boas, Ph.D., and Ph.D. candidate Scott Kaplan show in the new paper that soda purchases fell between 10 and 20 percent on Berkeley's campus directly after the soda tax was passed but before the prices officially increased in 2015. They also used Nielsen data to show a similar pattern: soda purchases at local stores decreased by 10.8 percent even before the higher prices went into effect.
“The election outcome caused a 10-20% reduction in sales of regular soda beverages before consumers faced higher prices anywhere, on campus or in stores off-campus,” Kaplan tells Inverse, “This suggests that you might not witness these types of effects if a sugar-sweetened beverage (or soda) tax was implemented without a preceding campaign and public vote.”
UC IGIS to host DroneCamp 2019 in Monterey
(Santa Cruz Tech Beat) Sara Isenberg, April 2
The Informatics and GIS Program (IGIS) of University of California's Division of Agriculture and Natural Resources is pleased to host the second offering of DroneCamp. This three-day intensive workshop covers everything you need to know to use drones for mapping, research, and land management, including…
Tiny whiteflies seem to be bugging people across the Central Coast, but why are there so many this year?
(KSBY) Megan Healy, April 1
A master gardener from the SLO University of California Cooperative Extension says dozens of people from south SLO County called asking why there are so many.
“It's probably a reflection of the increasing temperatures coming on top of all that nice water we have had, so we have had a flush of vegetation and the flies that came from eggs originally have just all hopped out,” said Cathryn Howarth, a master gardener a the SLO County UC Cooperative Extension.
According to the UC Agricultural and Natural Resources Statewide Integrated Pest Management Program, signs of whitefly manifestation include…
Inside the race to build the burger of the future
(Politico) Michael Grunwald, April 1
…Conglomerates like Walmart, McDonald's and General Mills have been setting emissions reduction targets for their suppliers, which will ratchet up pressure on farmers and ranchers to green their operations. But at a time when they're already getting squeezed by a handful of giant agribusinesses that process their animals, as well as the economic fallout from President Donald Trump's trade wars, they're hoping for government incentives to reduce their emissions. Frank Mitloehner, a professor of animal agriculture at the University of California-Davis, believes farmers and ranchers deserve to be paid for their ecological services—and recently said so to an Ocasio-Cortez staffer. For example, California is spending hundreds of millions of dollars to help them manage their manure in cleaner ways, which makes more sense to Mitloehner than demonizing them for the messes they make while putting food on people's tables. Many of them are conservative Republicans who deny climate science, but they're also pragmatic businesspeople—Mitloehner says they could store tremendous amounts of carbon on their lands if the price and the politics were right.
“Politically, farmers tend toward the Trump camp, and when they hear all this finger-pointing about farting cows, they just shut down,” Mitloehner says. “It troubles me, because I know how urgent this climate discussion is.”
… “There's such an enormous opportunity to reduce emissions in meat production, if you didn't hear all this counterproductive talk about how everything about it is terrible,” says Mitloehner, the Cal-Davis agricultural scientist. “Let's not alienate the people we need the most on our quest for a climate solution.”