Early and Late Treatments for Control of Potato Leafhoppers, 1993

Plots were established under irrigation at Staples, MN. Individual plots were 4 rows by 25 ft in length. Treatments were arranged in a RCB design and replicated 4 times. Total material applied each time was approximately 20 gpa. A hand held CO2 sprayer delivering a nozzle pressure of 40 psi was used for application. Timing of early application was at onset of bloom and 17 days later. Late treatments were applied when first pods were about 2 inches in length and at completion of bloom.