Comparison of Three Miticides Appued in Varying Volumes Of Finished Spray Against Twospotted Spider Mite (Tsm) on Corn in West Central Nebraska, 1985

Three adjacent fields of corn (28, 29, and 18 acres) were divided and 0.5 of each was treated aerially with one of 3 miticides, Supracide, Lorsban or Capture, with 0.5 of each treatment applied in 2 gal water and 0.5 applied in 5 gal. Posttassel treatments were applied by a Rockwell Thrush with a 45 ft wingspan. The spray boom was equipped with no. 12 stainless steel tips with a no. 56 core calibrated to deliver 2 or 5 gal water/acre at 25 psi at 105 mph. Spider mite infestations were rated 1 to 6 on a per leaf basis. A rating of 1 = 0 mites, 2 = a few mites, 3 = a few colonies, … 6 = leaf densely covered with mites. Apparent % control was calculated using the formula presented in the table.