Abstract
Abstract A series of tests were conducted with insecticides applied to 0.01 acre plots of alfalfa. Applications were with a R&D C02-pressurized sprayer at a rate of 26 gal/acre using a hand held boom with 4 (LF3) nozzles. Spray water pH was 7.5. Residual test exposures were replicated 4 times by caging 45-55 honey bees, 20 alkali bees, or 20 alfalfa leafcutting bees with each of 4 samples per treatment and time interval. Bees were placed in petri dish cages with screen inserts, fed sugar syrup and held at about 75°F. for 24 h mortality counts. Abbott's formula was used to correct for the natural mortality.
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