Location: Horticultural Crops Research
Project Number: 2072-21220-003-18-G
Project Type: Grant
Start Date: Sep 1, 2017
End Date: Sep 30, 2018
1. Assess non-organophosphate, bee-safe alternatives for scale control; 2. Assess non-organophosphate, bee-safe alternatives for control of blackvine weevil; 3. Assess non-organophosphate, non-carbamate bee-safe alternatives for tipworm control; 4. Assess resistance management fungicide programs to improve fresh fruit quality and reduce rot.
1. Two cranberry beds with serious infestations of Greedy Scale in SW Oregon will be treated with (untreated control), spirodiclofen, sucrose & Sorbitol octanoate esters, sulfoxaflor, pyriproxyfen,buprofezin, GS-omega/kappa-Hxtx-Hv1 and M-pede insecticide soap. Treatments will be applied twice during the crawler stage. Efficacy will be based on number of live crawlers 7 and 14 days after treatment. An additional study will compare the populations of Brown Soft Scale and Greedy Scale on beds that receive two or more annual applications of organo-phosphate (OP) insecticides to beds that have only received bio-rational insecticide, that are parasitoid friendly. 2. Two cranberry beds in Grayland, Washington will be chosen with a heavy population of blackvine weevil. Treatment comparisons will be untreated control, indoxacarb, and GS-omega/kappa-Hxt. Treatments will be applied twice after emergence of new adults, 7 days apart, by hand, emergence will be based on nocturnal adult sweeping counts. 3. Two cranberry beds with serious tipworm infestations in Long Beach, WA will be chosen. Treatment comparisons will be untreated control, flonicamid, cyclaniliprole, fenpropathrin, buprofezin, spirodiclofen, cyantraniliprole, flupyradifurone, GS-omega/kappa-Hxt, and tolfenpyrad. There will be 2 sites. Treatments will be applied twice, 7 days apart, by hand. The development stage of tipworm will be noted for each application. 4. Three cranberry beds with previous history of high field rots in Long Beach, WA will be chosen. Treatment will be applied in a split plot design. Percent field rot and yield will be assessed at harvest, and keeping quality after 6 weeks of storage.