Control of Potato Insects with Foliar Insecticides, Greeley, Co, 1984

Potatoes were planted 15 May at the Northern Colorado Research Center in Greeley, Colorado. Plot size was single-row, 25-ft in length separated by border rows and randomized in a complete block design with 3 replications. Treatments were applied 17 Jul and 1 Aug using a CO2 compressed air sprayer delivering 108 gal/acre. Evaluations of potato psyllid and GPA were made on 4 dates by sampling 20 leaves/plot. Colorado potato beetle larvae were evaluated 1 Aug by counting all larvae on the plants within a plot.