Insect and Slug Control in Corn Planted into Sod in Pennsylvania, 1995

Corn was planted no-till into sod neai Westover, PA (Clearfield Co.), on 5 Jun 1995, in a 1-acre field which had predominantly orchard grass, but also other grasses and legumes. The soil types were Wharton and Gilpin. The target corn plant population was 26,100 plants/acre. Herbicides were applied on 10 Jun (Atrazine 1.6 qt/acre Princep 2 qt/acre, Roundup 1.5 qt/acre, and Banvel 0.25 qt/acre). The design was a RCB with 5 replications. Plots were 20 ft long X 2 rows wide, with 30 inch row spacing. Treatments were applied at planting using a Max Emerge John Deere 7000R corn planter. T-band applications were applied in 7 inch bands over the row and into the furrow, and in-furrow applications were directed into furrow only. Soil moisture was average during May and Jun On 23 Jun, 10 random plants per plot were observed for the presence of leaf-feeding insects (black cutworm), wilting (stalk borer), and slug damage and measured for height. Additionally, the total plants emerged from two, 10-foot sections of each of the treated rows of each plot (20 ft total) were counted. On 7 Jul the number of wilted plants and total plants emerged were estimated as on 23 Jun.