A section of 3-yr-old CRP containing approximately 60 grasshoppers per m2 was selected for this trial. The grass-alfalfa provided relatively heavy cover with average plant height about 0.7 m. The age structure of the grasshopper population was 6% 1st instar, 11% 2nd, 24% 3rd, 27% 4th, 20% 5th, and 12% adults. Seventy-eight percent of the grasshoppers were TSG, 19% were MIG, and 3% were RLG. Plots were 17.5 m wide × 0.4 km in length, replicated 4 times in a randomized complete block design.

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... ticides were applied in 18.7 liter total material using an Ag Cat flying at 160 km/h. Application was initiated at 6:00 p.m. on 10 Jul and was completed shortly after 8:00 p.m. PoSttreatment counts were taken by 2 persons making 25 sweeps each with a standard 15 inch sweep net. Counts were averaged and recorded as 1 count/25 sweeps.