F93

Various insecticides applied as tray drench (TD), transplant water (TPW), side-dress soil drench (SDSD), and foliar (F) treatments were evaluated for TBW, THW, GPA, and TFB control on flue-cured tobacco. Eleven treatments were established in a RCB design with 4 replicates at the Virginia Tech Southern Piedmont AREC, Blackstone, VA (Table 1). Plots were 8 x 40 ft (2 rows x 22 plants) and separated by single untreated buffer rows. Standard production practices were followed. Admire Pro, Platinum, and HGW86 were applied as tray drench (TD) treatments to seedlings in 288-cell float trays on 2 May, 1 day before transplanting. Treatments were applied with a CO2-pressurized backpack sprayer that delivered 10 fl oz of solution per tray through 8002E tips at 30 psi. ‘NC 297’ flue-cured tobacco was transplanted on 3 May. Immediately after transplanting, Coragen (2 rates) and HGW86 TPW treatments were applied in 4 fl oz/plant (185 gpa) with a measuring cup. The soil moisture was excellent and it rained 1.38 inches on 4 May. On May 31, Coragen SDSD treatments were applied in 20 gpa with a CO2-pressurized backpack sprayer that delivered 60 psi through 8002E nozzles directed in 6-inch bands on each side of the row and immediately incorporated by cultivation. Soil moisture was good. On 7 Jun, Belt and Coragen S were applied with a CO2-pressurized backpack sprayer that delivered 25 gpa through three TX-10 nozzles per row at 60 psi. TBW, THW, and damaged plants were counted on 22 plants per plot on 8, 15, 22, and 29 Jun, and 5 Jul. TFB and TFB feeding holes were counted weekly on 10 plants per plot from 18 May to 15 Jun. The numbers of missing leaves due to TBW and THW feeding damage were rated on 5 Jul and the number of plants with type 2 TBW damage (topped) was determined for 44 plants per plot on 11 Jul. Insect count and yield data were analyzed by ANOVA and significantly different means were separated by SNK (P=0.05). Counts for TBW and THW were transformed to sqrt(x+1). Data for TFB and TFB feeding holes were transformed to Log (x+1) before analysis. Actual means are presented in the tables.