Tobacco Aphid Control on Burley Tobacco with Transplant Water and Foliar Treatments, 1995

Abstract

Abstract This experiment was conducted at the VPI & SU Southern Piedmont Agricultural Research and Extension Center, Blackstone, VA, to evaluate various insecticides applied as foliar and transplant water (TPW) treatments for control of TA on burley tobacco. Tobacco ‘Tennessee 90’ was transplanted into experimental plots on 23 May. Nine treatments and an untreated control were established in a RCB design with 4 replications. Plots, 4 X 40 ft (1 row X 24 plants), were separated by single untreated guard rows. Transplant water treatments were applied around each plant at 4 fl oz solution/plant (204 gal/acre) using a measuring cup and bucket. Foliar treatments were applied with a CO2-pressurized backpack sprayer that delivered 28 gal/acre at 60 psi through 3 TX-12 nozzles/row on 3 Jul. Temperatures ranged from 85-88 °F during application. TA counts were made on the upper 4 leaves of 10 plants per plot before treatment and at 3, 7, 14 and 21 DAT. Except for insect control, burley tobacco production methods including transplanting, fertilization, topping, sucker control, and herbicide and fungicide applications followed recommendations by the Virginia Cooperative Extension Service. Data were analyzed by ANOVA and significantly different means were separated WD test (K-ratio = 100). TA count data were transformed to Log10(X+l) before analysis. Actual means are presented in the table.