Lesser Cornstalk Borer Control, Georgia, 1980

Two tests evaluated the effectiveness of various materials in preventing damage to seedling and whorl-stage sorghum by lesser cornstalk borer larvae. Test 1 was planted on May 28 with Funk’s G522DR by conventional tillage methods following wheat on the University of Georgia Beckham Farm,Pike County. Test 2 was planted on July 26 with DeKalb C42Y by conventional tillage methods following sod on the McKinnon Farm in Forsyth, Georgia. Soil type at both locations was Cecil loamy clay. Plots were 6.1 m x 3 rows and were separated by 1 untreated row or 1 m alley. Treatments were replicated 4 times in a randomized complete block design. Granules were applied over the rows with a Gandy Ro-Bander. Sprays were applied with compressed-air sprayers calibrated to deliver 40 gal of water per acre at 30 psi. Applications were made on June 13 in Test 1 and Aug 15 in Test 2 immediately after seedling emergence. Control was evaluated 3, 7, and 14 days after application by counting the number of plants killed or stunted by lesser cornstalk borer larvae within a 3 m section of the middle row of each plot.