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(F25) CORN (FIELD): Zea mays L. ‘Dekalb 683’ EVALUATION OF PLANTING TIME INSECTICIDE APPLICATION METHODOLOGIES FOR CONTROLLING SUGARCANE BEETLE IN FIELD CORN, 2000 K. Lohmeyer, K. Lance, and J. All Department of Entomology University of Georgia Athens, GA 30602 Phone: (706) 542-2856 Fax: (706) 542-2279 Sugarcane beetle: Euetheola rugiceps (LeConte) This study was conducted at the Northwest Branch Experiment Station, Adairsville, GA, to evaluate the efficacy of various methods of applying soil insecticides for the control of sugarcane beetle in field corn. Treatments were applied to the second row of 25 ft long, 4-row plots. An RCB design with four replications was used. One untreated check was included in each replication. Seed was planted on 27 Apr using a two- row Monesem pneumatic planter. Granular insecticide formulations were applied at planting using three methods: a 7-inch band application, a 7-inch T-band application, and precision placement of insecticide onto the seed using a premeasured amount of insecticide and a PVC tube. Liquid insecticide formulations were applied by two methods: in-furrow application with a backpack sprayer and precision placement of insecticide using a pipette. All insecticide rates are specified as lb (AI)/acre based on 38-inch rows. On 18 May, corn seedlings were in the 2-leaf stage and showed signs of sugarcane beetle damage. Plants were assessed for sugarcane beetle damage by surveying all of the plants in the two middle rows of each plot for stunting, tillering, and large feeding punctures just below the soil line. Damaged and undamaged plants were counted. Plants were also sampled for sugarcane beetle damage on 23 May and 8 Jun. On 18 Oct, the ears of the treated row from each plot were counted and picked by hand. The ears of corn were weighed in pounds in the field to determine yield. No significant differences were observed among the treatments with respect to percentage of plants damaged on any of the three sampling dates. No significant differences were observed in yield.
Arthropod Management Tests – Oxford University Press
Published: Jan 1, 2001
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