Slurry Treatments for Insect Control on Grain Seeds, 1981

Abstract

Abstract The primary objective of these tests was to evaluate the effectiveness of Lorsban and Reldan in comparison to methoxychlor and malathion treatments for protection of seeds against insect infestations in storage. Gustafson Captan 30 DD was applied to 10-lb lots of corn, grain sorghum, and wheat seed prepared in a Batch Lab Treater. Calculated rates of insecticides were added to the slurry treatment mixture as needed. Following application of slurry, 100-g samples of seed were taken at random from each treatment lot. Each sample was put into a 1-pt mason jar equipped with a filter paper cover held in place with the jar ring. Each of 10 total samples of each kind of cereal grain seed tested for each treatment was exposed to 50 laboratory-reared adults of the following: the red flour beetle, the sawtoothed grain beetle, and the rice weevil. A total of five 100-g samples of each kind of seed tested for each treatment were exposed to 20 young Indianmeal moths; likewise, 5 sample replications of seed were exposed to 20 young Angoumois grain moths. All test seeds were held in a room maintained at 80 F and 50-60* RH. Initial counts of live moths were made 3 days after infestation; counts of beetles were made 7 days after initial infestation of seed with insects. When the F. generation of moths began emerging in untreated samples of seed, moth counts were made at regular intervals, and moths were removed as counted. All F, generation emergence was complete by the end of 45 days. A second or reproductive count of beetles was made 60 days after initial infestation.