potato 5-9-12 CLEAN - Vegetableipmasia.org

ORGANIC POTATO PRODUCTION Table 15.4 Pesticides Labeled for Management of Flea Beetles Class of Compounds Product Name (active ingredient) OTHER Surround WP (kaolin) Product Rate PHI (days) 25 – 50 lbs Up to day of harvest REI (hours) Efficacy Comments 4 3 Surround effective in 0/4 trials. Suppression only. Apply every 7 -­‐10 days, starting prior to infestation. 59B PHI = pre-­‐harvest interval, REI = restricted entry interval. -­‐ = pre-­‐harvest interval isn't specified on label. Efficacy: 1-­‐ effective in half or more of recent university trials, 2-­‐ effective in less than half of recent university trials, 3-­‐not effective in any known trials, ?-­‐ not reviewed or no research available 15.5 Subterranean and Surface CutwormsTime for concern: May through harvestKey characteristics: Many species of cutworms attack potatoes. The larvae are brown or gray and grow to about 1/5 inch inlength. Some species cut the stems at the soil level, while others feed underground. Subterranean cutworms stay undergroundand feed on potato roots. Surface cutworms feed at the surface and are famous for severing new seedlings at or slightly aboveground level. See Cornell’s HUfactsheetH (Reference 110) and HUlife cycleUH (Reference 112).Relative Risk: These pests are not a consistent problem in New York potatoes.Management Option Scouting/thresholds Resistant varieties Site selection Recommendation for Subterranean and Surface Cutworms Thresholds have not been established for organic production. No resistant varieties are available. Weedy fields are at greater risk of attracting moths for egg laying, which can lead to a build up of larvae. At the time this guide was produced, the following materials were labeled in New York State for managing this pest and were allowable for organic production. Listing a pest on a pesticide label does not assure the pesticide’s effectiveness. The registration status of pesticides can and does change. Pesticides must be currently registered with the New York State Department of Environmental Conservation (DEC) to be used legally in NY. Those pesticides meeting requirements in EPA Ruling 40 CFR Part 152.25(b) (also known as 25(b) pesticides) do not require registration. Current NY pesticide registrations can be checked on the Pesticide Product, Ingredient, and Manufacturer System (PIMS website) http://pims.psur.cornell.edu/ (Reference 3). ALWAYS CHECK WITH YOUR CERTIFIER before using a new product. Table 15.5 Pesticides Labeled for Management of Subterranean and and Surface Cutworms Class of Compounds Product Name (active ingredient) Product Rate PHI (days) BIOLOGICALS Biobit HP (Bacillus thuringiensis subsp. Kurstaki str. ABTS-­‐351) 0.5-­‐1 lb/A 0 4 ? REI (hours) Efficacy Comments Deliver (Bacillus thuringiensis subsp. kurstaki) Seduce Insect Bait (spinosad) Xen Tari (Bacillus thuringiensis subsp. Aizawai, str. ABTS-­‐1857) BOTANICALS Aza-­‐Direct (azadirachtin) 0.25-­‐1.5 lb/A 0 4 ? 20-­‐44 lb/A 7 4 ? Broadcast granular formulation 0.5 – 1.5 lbs Up to day of harvest 4 ? 1-­‐2 pt/A 0 4 ? Apply as foliar spray or soil drench. AzaGuard 8-­‐16 fl oz/A 0 4 ? Use with an OMRI approved spray oil. 722012