Seed Treatments for Rice Water Weevil Control, 1983

Rice seed was treated with insecticides 25 May. For each treatment 2 lb of seed were combined with the insecticide in a seed treater similar to a concrete mixer. In Test I each insecticide was mixed with water in sufficient quantity to thoroughly coat the seed and 3% Methocel Gel was added to Ectiban and Demon. In Test II insecticides were mixed with water or acetone. A sticker consisting of equal volumes of water, glycerin, and 75% ethanol was added to each seed-treatment in Test II during mixing. The seed was air dried and packaged in paper bags. The 4 by 15 ft plots were planted 26 May and flooded 28 June. Furadan 3G was applied 6 Jul. All plots were sampled for root-feeding larvae 19 and 20 July by taking 5 soil cores (9 cm dia by 7 cm deep) from the drill rows of each plot. Cores were processed by washing through a #40 US Standard testing sieve and floating the larvae out in brine.