Potato Leafhopper and Green Peach Aphid Control on Potato with Soil Applied Systemic Insecticides, 1975

‘Russet Burbank’ potatoes were planted May 16, at Rosemount, Minnesota. Systemic insecticides were applied as in-furrow, split band treatments at planting. Two Temik plots received additional sidedress applications of Temik, applied midway between the rows, July 8. Plots were 6 rows, 60 ft long, randomized in complete blocks with 3 replications. The soil is a Waukegan silt loam with medium organic matter. Eptam preplant and Sencor postemergence herbicides were applied for weed control. Fungicidal sprays, Dithane M-45, Bravo, or Difolatan, were applied weekly from June 20. No insecticidal sprays were applied. Insect counts ware made at 2 week intervals, July 14 to Sep 10. Each count consisted of 2 samples of 35 randomly selected, mid-plant leaves, taken 48 hr apart. Yields were taken from 35 ft row/plot September 15.