Control of Greenbug and Yellow Sugarcane Aphids in Seedling Sorghum, 1993

Abstract

Abstract Gaucho 480 FS applied as a seed treatment was compared to granular insecticides applied at planting at 2 locations in north central TX. In Cooke County, ‘Triumph 74CR’ grain sorghum was planted 21 Apr in plots 4 rows × 500 ft. In Collin County, ‘Cargil 837’ grain sorghum was planted 2 Apr in 0.11 acre plots 2 rows wide. Treatments were arranged in a RCBD with 3 replications. A John Deere Max Emerge planter was used to apply the granular insecticides at both locations. Granular insecticides were applied without banders to the soil surface directly above the seed furrow and incorporated by the press wheel. Gustafson treated the seed with Gaucho 480 FS. The soil was a Houston black clay, pH = 7.8. Plant stands were determined by counting the number of plants in 3 row ft at 4 locations per plot 2 wk after planting. Densities of GB and YSA were recorded on 5 consecutive plants at 4 locations per plot at 14-45 d after planting (DAP). Yields were determined by machine harvest (Collin County) or by hand harvesting and threshing the panicles in 13 row ft from each of the 2 center rows per plot (Cooke County).