UC Agriculture & Natural Resources News
Rachael Freeman Long treasures her memories as a graduate student in entomology at the University of California, Davis. She remembers eating fried grasshoppers at a party. "They're okay with a lot of spices!" She remembers watching Professor Harry H. Laidlaw Jr. and his wife, Ruth, give one...
Rachael Long, UCCE farm advisor, leads a tour of her family farm in Yolo County in April of 2015. "Hedgerows are important for enhancing beneficial insects, including bees and natural enemies, for better biocontrol and crop pollination in adjacent field crops, with measurable economic benefits," she says. (Photo by Kathy Keatley Garvey)
Researchers who have been investigating the impacts of the Camp Fire and other urban fires in Northern California will gather June 4 in Chico to share what they have learned. Members of the public are invited to attend the Camp Fire Water Resources Monitoring and Research Symposium, which will be held at the California State University, Chico Farm located at 311 Nicholas C Shouten Lane, Chico, CA 95928.
“The recent urban fires across California have raised questions about the fire impacts on watershed health, food safety and groundwater,” said Tracy Schohr, UC Cooperative Extension livestock and natural resources advisor for Butte, Plumas and Sierra counties, who is organizing the symposium.
“The Camp Fire Water Resources Monitoring and Research Symposium on June 4 creates a forum for researchers across a broad spectrum of disciplines to share findings from research conducted in Butte County and across the North State.”
“Chico State is partnering with University of California Cooperative Extension to host this educational symposium to help our community understand the impacts of the Camp Fire,” said Kasey DeAtley, Chico State professor in the College of Agriculture. “In a region rich in natural resources and agriculture production, there has been significant interest in the topic of urban fire implications and researchers have been working hard to find answers that will be shared at the symposium.”
The program will start at 9 a.m. and will feature three sessions. The day will kick off with a session titled “First Year Findings,” looking at initial rapid response for water quality, surface water monitoring, groundwater monitoring and more.
The second session is on “Urban Fires Impacts on Food and Agriculture” and will feature research presentations from UC Cooperative Extension on livestock drinking water quality and forage, eggs laid by backyard poultry, fruits and vegetables grown in gardens, and post-fire forest management.
The symposium will conclude with a session on future investigations, with Chico State professors sharing an overview of a comprehensive study underway to understand the impacts of the Camp Fire on water quality and soil health.
For more information and to register, visit https://ucanr.edu/sites/Rangelands. The event is $50 to attend and includes program materials, morning refreshments and lunch. Parking is free at the Chico State Farm.
People who are interested in using drones for real-world mapping are invited to attend a three-day intensive drone workshop in the Monterey Bay Area. The third annual DroneCamp will be offered June 18-20 by UC Agriculture and Natural Resources' Informatics and GIS Program. No experience with drone technology is needed to participate.
Drone mapping involves taking high-resolution photos with drones and stitching them together with software to make extremely accurate, orthorectified maps. More difficult than videography, it is widely used in agriculture, construction, archeology, surveying, facilities management and other fields. DroneCamp will cover all the topics someone needs to make maps with drones, including:
- Technology - the different types of drone and sensor hardware, costs and applications
- Drone science - principles of photogrammetry and remote sensing
- Safety and regulations - learn to fly safely and legally, including tips on getting your FAA Part 107 Remote Pilot Certificate
- Mission planning - flight planning tools and principles for specific mission objectives
- Flight operations - hands-on practice with both manual and programmed flights
- Data processing - processing drone data into orthomosaics and 3D digital surface models; assessing quality control
- Data analysis - techniques for analyzing drone data in GIS and remote sensing software
- Visualization - create 3D models of your data
- Latest trends - hear about new and upcoming developments in drone technology, data processing, and regulations
On the first day, DroneCamp instructors will discuss drone platforms, sensor technologies and regulations. On the following two days, participants will receive hands-on instruction on flying safely, using automated flight software, emergency procedures, managing data, and turning images into maps using Pix4D mapper and ArcGIS Pro.
Registration is $900 for the general public and $500 for University of California students and employees. Registration includes instruction, materials, flight practice and lunches. Scholarships are available.
This year DroneCamp is being held in conjunction with the Monterey Bay DART (Drones Automation & Robotics Technology), which is holding an industry symposium on Friday, June 21. DroneCamp participants get a $50 discount to attend the symposium.
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.
Rachael Long, UC Cooperative Extension advisor covering integrated pest management for field crops in Yolo, Solano and Sacramento counties, is the recipient of the 2019 Bradford Rominger Agricultural Sustainability Leadership Award.
Long will receive the award at a presentation at 4:30 p.m. May 28 in the Alpha Gamma Rho Hall (AGR) room of the Walter A. Buehler Alumni Center. A reception begins at 4.
The award, established in 2008, honors individuals who have a broad understanding of agricultural systems and the environment, takes the long view, and aims high to make a difference in the world. Awardees exhibit the leadership, work ethic and integrity epitomized by the late Eric Bradford, a livestock geneticist who served UC Davis for 50 years, and the late Charlie Rominger, a fifth-generation Yolo County farmer and land preservationist.
The award presentation prefaces the Agricultural Sustainability Institute's Distinguished Speakers' Seminar, “Building a Better World, the Opportunity to Achieve Climate Drawdown and a Safe Future" by environmental scientist Jonathan Foley, executive director of Drawdown. Foley, ranked by Thomas Reuters as among the top 1 percent of the most cited global scientists, will address the audience from 5 to 6 p.m.
Long received her bachelor's degree in biology from UC Berkeley and her master's degree in entomology from UC Davis. She was hired as one of the first sustainable agriculture advisors with UCCE in 1992, with a charge to, “Develop, evaluate, and implement nonchemical approaches to pest management in field crop production that maintains environmental and economic viability of agriculture."
During her career with UCCE, Rachael was a pioneer in developing practices to protect water quality from agricultural crop production, helping farmers meet state mandates for clean surface water. She worked on hedgerows, documenting that field edge plantings of native California plants attract beneficial insects, including bees and natural enemies, for better pest control and pollination in adjacent crops. She documented that birds and bats are farmer allies; they help control codling moth pests in walnut orchards. She's promoted hawks and barn owls for control of rodent pests. She has also written numerous publications focusing on agronomic practices for managing pest, weeds, and diseases in field crop production.
At the time she started her research projects over 25 years ago, her ideas were way outside the box and on the fringe. Now her work is mainstream with the UC IPM guidelines incorporating the value of habitat planting for enhancing natural enemies and pollinators on farms for better pollination and biocontrol of crop pests. The California Healthy Soils Initiative and Natural Resource Conservation Service have cost share funding for hedgerow establishment on farms, for pest management and carbon sequestration. She continues to do research on hedgerows, but more importantly, she strives to be a leader by teaching others about agriculture and the need to have co-existence between farming, food production, and wildlife conservation for a better world for all. Her work is documented in many peer-reviewed publications, UC ANR blogs, cost studies and crop production manuals.
“I'm honored to receive this award, especially in recognition of two extraordinary people, Charlie and Eric," Long said. "I owe thanks to so many people who helped in this journey and feel lucky to work in a community that is open to new ideas. I'm especially grateful to farmers in the Sacramento Valley who allowed me to work on their farms. I couldn't have done all this work without their support.”