Evaluation of Insecticide Efficacy for Control of Pecan Spittlebug in Louisiana, 1997

An efficacy trial for 1 control of pecan spittlebug was conducted on 60-year-old pecan trees of the ‘Success’ cultivar at Greensleeves Plantation in south Caddo Parish, Louisiana. ; bsecticides evaluated included Provado 1.6°F at 4 oz product/100 gal, Imidan 70 WP at 0.5 and 1.0 lb product/100 gal, Lorsban 50 W at 1.0 lb product/100 gal, and Lorsban 4 E at 16 oz product/100 gal. The experimental design was a RCB with 4 replications. On each of the four trees, six spittlebug-infested ; limbs corresponding to each of the treatments were selected. From each limb 10 spittlebug-infested terminals were selected and tagged (40 infested ter minals/treatment). The tagging was done on 11 Apr. Treatments were applied on 14 Apr using a 3-gal, hand-held compressed air sprayer. The check was sprayed with water. Each of the limbs containing tagged terminals was sprayed to the point of runoff. The size of the spittle masses at the time of treatment ranged from 0.2-0.4 inches in dia. Post-treatment counts were made on 21 Apr.