CONTROL OF SECOND GENERATION CHINCH BUGS WITH EXPERIMENTAL FORMULATIONS OF ZETA-CYPERMETHRIN, 2002

Insecticides were evaluated for control of chinch bugs on buffalograss research plots at the University of Nebraska JSA Research Facility near Mead Nebraska. The turf (100% buffalograss) was maintained at a height of 3 inches. Thatch accumulation in the plot area was 0.25 inch. Field conditions at the study site were: soil type, silty clay loam; soil organic matter, 3-5%; soil pH, 6-7; water pH, 7.0. Environmental conditions at the time of treatment were as follows: soil moisture 9.4%; air temperature 76° F; soil temperature 75° F; relative humidity 79%; wind direction and velocity 146° at 5 mph. Plots were 5 x 3 ft and the experimental design was a RCB with three replications. Insecticide treatments were applied on 27 Aug 2002. Granule applications were applied using a hand shaker. Post-treatment irrigation was 0.25 inches. A total of 0.80 inches of rain accumulated during the post-treatment period. Treatments were evaluated 7 DAT (3 Sep) by taking two 8-inch diameter vacuum samples (0.7 ft2 total area per plot) with a modified Echo 2400 Shred 'N Vac. Samples were placed in Berlese funnels and surviving chinch bugs were extracted and counted after 48 hr. Means were separated by LSD.