Treatment Plan

Where pressure is severe, Grape Berry Moth can be a difficult insect to control as it has multiple generations per season and each generation emerges over a longer time period than the previous one. Once the larvae hatches from eggs they move into grape berries where they are protected from insecticide applications, so they can (for the most part) only be controlled by ingesting insecticide or by direct contact with insecticide between the time they hatch and the time they move into the fruit. Consult state or regional guidelines in your area to determine the appropriate timing of application(s). Researchers at Cornell University have developed a grape berry moth phenology model that bases spray applications relative to wild grape bloom and can be found at http://newa.cornell.edu/index.php?page=grape-diseases Cornell Bulletin 138 discusses the factors that determine the risk of economic damage due to grape berry moth and can be found at http://nysipm.cornell.edu/publications/grapeman/files/risk.pdf Apply Assail 30SG at 2.5 to 5.3 ounces per acre per application. Do not make more than 2 applications per season, do not apply more than once every 14 days, and do not use spray adjuvants. 3 day PHI, 12 hr REI. Apply Delegate WG at 3 to 5 ounces per acre per application, but do not make more than 5 applications per calendar year and do not apply more than 19.5 ounces per acre per year. Do not make more than 2 consecutive applications, if additional treatments are required rotate to another class of effective insecticide for at least one application. 7 day PHI, 4 hr REI. Apply Drexel Carbaryl 4L at 2 quarts per acre per application. Up to 5 applications per season are permitted with a minimum of 7 days between applications. 7 day PHI, 48 hr REI.