DPR issued a special local need effective September 9, 2013 that allows the use of Brigade WSB on citrus trunks at the 5 lb product (0.5 lb ai/acre) rate for Fuller rose beetle. The SLN allows two treatments of 5 lbs applied 12-16 weeks apart OR four treatments of 2.5 lbs applied 6-8 weeks apart. The SLN allows the use of either a hand wand sprayer or shielded sprayer to apply the treatment to the lower 18 inches of skirt-pruned tree trunks. This SLN provides a higher rate and an additional method of application - which should improve control of Fuller rose beetle. Dr. Joseph Morse and Dr. Beth Grafton-Cardwell are conducting field trials to determine the best combination of treatments (skirt pruning, trunk treatments, foliar treatments) to prevent Fuller rose beetle from laying eggs under the calyx of fruit. Korea is allowing Methyl Bromide fumigation this year, but is definitely not allowing it next year. So it is important to continue to treat for Fuller rose beetle this season to drive the beetle populations down and make control easier next year.
I received the following update from the California Citrus Qualilty Council. This is exciting news, since Fuller rose beetle is so difficult to completely eliminate from orchards. Please note that even though Korean officials are allowing MeBr fumigation this season, they still expect to see reductions in Fuller rose beetle interceptions. In addition, since fumigation is likely only a temporary situation, growers would be wise to continue treatments for FRB this season to reduce populations for future seasons.
California Citrus Industry,
USDA’s Animal and Plant Health Inspection Service (APHIS) officials confirmed this morning that their counterpart agency in Korea agreed to an additional year of blanket fumigation for California citrus. While Korea’s Quarantine Inspection Service (QIA) agreed to provide an extension of the methyl bromide treatment in Korea, they stated that they expect to see reductions in Fuller rose beetle (FRB) interceptions and periodic updates on the progress of research on FRB mitigation measures.
This new development removes the uncertainty regarding citrus shipments to Korea for the 2013-14 season.
Additional information will be provided at the California Citrus Quality Council’s (CCQC) Korea export program preseason meeting, which will be held at the Visalia Convention Center at 9:00 a.m. on Sept. 26.
- Author: Jodi Azulai
- Contributor: Elizabeth E Grafton-Cardwell
To accurately time insecticide treatments see the new UC IPM online presentation about using degree-days for pests in fruit and nut trees. While we can’t control heat waves such as the recent one, we can measure daily temperatures to protect our orchards from several important insect pests such as California red scale, navel orangeworm, San Jose scale, orange tortrix, and codling moth.
Using degree-days to time treatments allows you to reduce insecticide use by targeting the most susceptible insect stage, attaining maximum control and reducing costs. Monitoring and using degree-days allows for the correct application timing of reduced-risk products preserving many of the parasites and predators that control other orchard pests.
Walt Bentley, retired UC IPM Advisor, narrates the 15-minute presentation and explains the basics using stone fruit and nut pest examples:
- How heat influences insect development
- What a degree-day is
- How degree-days accumulate
- What data is needed to calculate degree-days
- The benefits of using degree-days to time insecticide treatments
The presentation can be accessed on the UC IPM degree day website: http://www.ipm.ucdavis.edu/WEATHER/index.html.
In the future, look forward to a second degree-day presentation on how to use UC IPM Web site tools and information for calculating degree-days.
VOCs are gasses that combine with other substances to form ground level ozone (smog). In an effort to reduce smog in the San Joaquin Valley, as of Nov 1, the Department of Pesticide Regulation (DPR) is restricting sales and use of High-VOC producing ag products during the months of May through October. High-VOC ag products have an emission potential (EP) greater than 35%. For citrus, products of concern include chlorpyrifos, gibberellin, abamectin and oxyfluorfen. There are many formulations of each of these agricultural products and the goal is to choose formulations that keep the EP below 35%. The following link provides a list of the formulations that are above (High-VOC) and below (Low-VOC) the EP threshold of 35% for all crops. Keep this in mind as you purchase and use insecticides, herbicides and gibberellin.
List of High and Low-VOC formulations http://www.cdpr.ca.gov/docs/emon/vocs/vocproj/nonfum_voc_prod_list.pdf
Assemblyman Jim Patterson will be hosting a Citrus Industry Town Hall to discuss Asian Citrus Psyllid and the steps being taken to control its spread in California. The California Department of Food and Agriculture, local government officials and leading citrus researchers will be on hand to provide information and answer any questions. The event is open to all interested persons but space is limited so please RSVP to Assemblyman Patterson’s Fresno office at (559) 446-2029.
Date & Time: Friday August, 23, 2013 | 10:00am
Location: Fresno County Farm Bureau 1274 W Hedges Ave Fresno, CA 93728
Speakers Scheduled to Attend:
- Victoria Hornbaker – CDFA, Program Coordinator
- Dr. Beth Grafton-Cardwell - UC IPM Specialist and Research Entomologist
- Sylvie Robillard - Fresno County Grower Liaison
- Les Wright - Fresno County Ag Commissioner
- Joel Nelsen – California Citrus Mutual, President