2013 Annual Report
1a.Objectives (from AD-416):
Conduct laboratory and field tests to provide residue data to establish a tolerance on a specific commodity or to support a crop group tolerance. [NP 304, C2, and PS 2B].
1b.Approach (from AD-416):
Research to suppport registrations of minor use pesticides. Apply peticicdes according to IR-4 protocol guidelines. Obtain performance data, phytotoxicity, yield and efficacy from treated and untreated field plots. Ship samples to laboratories for residue analyses. Protocols will be employed using appropriate Standard Operating Procedures and conducted under provisions outlined in 40CFR part 160 in accordances with EPA's Laboratory Practice Standards. Formerly 0500-0000774-00D (11/05); and 0500-00007-053-00D (09/04) 0500-00007-090-00D (08/10).
Interregional Research Project #4 (IR-4) field trials are being conducted on 29 projects according to an approved protocol developed by IR-4 Project Headquarters. Following local good agricultural practices for crop production, field testing is in progress on cool season vegetables, herbs, strawberries, cane berries and prickly pear cactus. A variety of pesticides are being evaluated on these minor use crops.
Commercially acceptable minor crops are being grown and sprayed according to the protocols with various test substances using small plot sprayers that simulate commercial application equipment. Crops are frequently monitored for phytotoxicity from application treatments and timing. Residue samples are collected at harvest and frozen until shipment to a designated laboratory for residue analysis.
Six field trials on prickly pear cactus are completed for the soil application of flupyradifurone (BYI 02960) through the drip irrigation system. This insecticide is needed to control black bean aphid, which transmits a Umbravirus that causes a serious stunting problem, and cochineal scale. Both the cactus fruit and pads were sampled to compare residue levels with earlier IR-4 trials carried out with this chemical applied as a foliar application.
Currently eleven trials are being conducted on broccoli, cabbage, mustard greens, spinach and head and leaf lettuce with nitrapyrin. The GF-3181 formulation of nitrapyrin will help growers manage nitrogen availability to these crops by inhibiting the nitrification of ammoniacal and urea nitrogen fertilizer in the soil by selectively and temporarily inhibiting Nitrosomonas bacteria.
The Salinas field site will manage approximately 30 to 40 field residue trials per year on minor use crops over the next three years. The facility will provide treated and untreated samples to the laboratories for residue analysis, while continuing to produce quality scientific data in order to meet Environmental Protection Agency Good Laboratory Practice requirements for the IR-4 program. The same milestones will be utilized over the three year period.
Minor Crop Pesticide Residue Tests. The mission of the Interregional Research Project #4 (IR-4) Project is to facilitate registration of sustainable pest management technology for specialty crops and minor uses. IR-4 serves as an intermediary between the agri-chemical industry and specialty crop growers. Due to the inherently small specialty crop market and cost prohibitive regulatory requirements, companies shy away from investing in the development of products for low acreage specialty crops. ARS researchers in Salinas, Califronia, continue to assist specialty crop growers by participating in IR-4 sponsored field research projects. Growers benefit by having effect pest management tools that enable them to produce high quality food crops and the general public benefits by having ample food available, providing essential nutrition for a balanced diet at reasonable prices. (NP 304 (Crop Protection and Quarantine), Component 2, Problem Area A).