The oat thrips (Stenothrips graminum) – pest management
The oat thrips, Stenothrips graminum, is a species found in Europe, and it is less known in Asia and North America.
Description. The female has a body that is 0.9-1.1 mm long, colored in yellow-gray or brown, and the male is 0.8-0.9 mm long.
Biology and ecology. The oat thrips is a species that produces a generation once every 1-2 years, overwintering in the adult stage in the soil at a depth of 30-50 cm, in chambers made from fine soil granules. After feeding, the females lay eggs for 7-12 days, 3-4 eggs/day (about 100 eggs in total), and on one spike there can be about 115 eggs. After an incubation period of about 7 days, the larvae appear, which feed on the floral organs or on the new grains, for two weeks.
Attacked plants and damages. Species are known to infest spontaneous grasses, cultivated cereals, etc. Through their way of feeding (they suck the intracellular fluid), discolored spots appear on leaves, pods, stems, and blades, leading to their withering.
Control: The deep plowing at 20-25 cm ensures the destruction of 90% of the larvae that are hidden in the vegetal remains in the soil. Chemical treatments should be carried out with various approved products such as:
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