Insecticide Evaluation of Residual And Contact Sprays for Control Of Jadera Haematoloma, (HERRICKSCHAEFFER), 1989

Abstract

Abstract Two laboratory tests were conducted to evaluate the effect of several compounds for control of J. haematoloma nymphs. The first test was designed to evaluate the control obtained by direct spray contact (test 1). Nymphs were placed in 4 inch diam cups and then treated with a modified B & G Sprayer, model 104-S. The sprayer was mounted on a motorized track powered by a zero max O-400 electric motor. A spraying system multi-teejet fan nozzle 800067 was attached to the nozzle stand and transported by the motorized track. The nozzle delivered 2.2 oz of finished spray/100 ft2 at 20 psi. The application speed was 2.5 ft per s. After treatment, J. Haematoloma nymphs were placed on paper towels under clear 10 oz plastic cups for observation. Each treatment was replicated 4 times using 5 bugs/replication. Mortality counts were made at 1, 4, 8, 24, and 48 HAE (hours after exposure). Test 2 was designed to evaluate the control obtained by the residual activity of the compounds. The test surfaces consisted of 4 inch × 4 inch × ¼ inch masonite panels and were treated as described for test 1. Treatments were allowed to dry 24 hr before nymphs were exposed to the treated surface. Containment to the panel surface was accomplished by using clear 10 oz plastic cups (3 inch in diameter). To prevent the insects from climbing up the sides, a petroleum jelly + mineral oil mixture was applied to the container wall. Five nymphs were placed under each container and confined to the treated surface for 60 min at which time they were transferred to a separate container and placed on paper towels for observation. Each treatment was replicated 4 times. Mortality counts were made at 1, 4, 8, 24, and 48 HAE. Control was determined at 1, 14, and 30 DAT. J. haematoloma used in both tests were collected from a natural habitat that had no prior insecticide treatment. The insects were retained in 1 gal containers with food, water, and foliage from a chinaberry tree. All mortality figures for these tests are accumulative from the first observation (1 HOAT) for that particular date to the conclusion of the test on that date (48 HOAT).