The UC ANR web site Asian Citrus Psyllid Distribution and Management http://ucanr.edu/sites/ACP/Distribution_of_ACP_in_California/ provides a zoomable web map that shows the quarantine boundaries around the HLB-infected trees (found and removed) in southern California.
If you click on the layers drop down arrow, you can turn off the ACP layer and check the box for the newly released Diaphorencyrtus parasitic wasp and see where it has been released to help reduce Asian citrus psyllid in residential areas (you can also view the Tamarixia wasp). http://ucanr.edu/sites/ACP/Distribution_of_ACP_in_California/
The UC IPM Pest Management Guidelines for Citrus have been updated for Asian citrus psyllid and Fuller rose beetle. There are several new insecticides listed and new recommendations for how to manage these pests in citrus orchards. The main link is www.ipm.ucanr.edu and the specific links are:
- Author: tunyalee martin
- Contact: Elizabeth E Grafton-Cardwell
—Tunyalee Martin, UC Statewide IPM Program
It's that time of year when volatile organic compound (VOC) emissions released from nonfumigant pesticide applications can impair air quality. Regulations are in effect that growers and pest control advisers should know about, especially for the San Joaquin Valley starting May 1.
Here are highlights from Pam Wofford, Department of Pesticide Regulation (DPR), regarding the San Joaquin Valley. Pest control advisers cannot recommend and growers cannot use:
- high-VOC products containing abamectin, chlorpyrifos, gibberellins, or oxyfluorfen
- between May 1 and October 31, 2015 and again for May – Oct. 2016
- for alfalfa, almond, citrus, cotton, grape, pistachio, or walnut
Review the updated factsheet for nonfumigant regulations, available on the DPR website. Limited, specific exceptions are allowed. For exceptions, a PCA recommendation is required.
No regulations affect the use of low-VOC products. Pest control dealer requirements remain unchanged, as do fumigant VOC requirements.
Nonfumigant VOC emissions regulations for the San Joaquin Valley strive to maintain VOC emissions below the state implementation plan goal of 18.1 tons/day. In 2013, emissions increased to 18.28 tons/day from 16.26 tons/day in 2012.
View the 2013 VOC inventory for a report on all five ozone nonattainment areas on the DPR website. In addition to state implementation goals, there are VOC regulation benchmark goals to reduce emissions by 12 to 20% from emission levels in 1990. In 2013, VOC levels were reduced 11 to 88%.
- Department of Pesticide Regulation VOC information
- Nonfumigant pesticide product VOC information
- UC IPM VOC: learn to minimize emissions and use DPR's VOC calculators
- UC IPM Pest Management Guidelines
Once again, we are having hot dry weather conditions in the San Joaquin Valley. This means that the first male California red scale are already flying in Kern and Tulare counties (Biofix) and degree days are accumulating 1-2 weeks ahead of 'normal'. Unless we get cooling weather, this means that the first generation of crawlers will be emerging earlier than usual. See degree day calculations for Kern and Tulare counties.