Sham Shui Po Strictly Prevents the Damage of Food Root Worm
The rootworm is one generation old in Jiangsu in one year. The larvae live in the rhizosphere of the lotus root and 15-30 cm below the internode or soil with water. In the second half of April to the beginning of May, the wintering larvae begin to be active. During the month of May to June, the adult larvae emerged and spawned. In late July to early August, the eggs hatched during the period from May to June and August. -September is the main hazard period and enters the wintering period after October. Adults climbed up and emerged in the earth after they emerged from the earth. They rested on the lotus leaves and lived in action. They were a little surprised to make short-distance flight or dive and escape along the water surface. They liked to eat eye dishes and lotus leaves, and they were suspended. . Eggs are prolific in the eye dishes, leaves on the back or leaf surface, and a few are produced on aquatic weeds such as Apatula and A. After hatching, the larvae crawled down to the soil and the old mature larvae formed glial thin layers in the roots of the lotus roots and larvae them. Since larvae can survive in the water for a long time, and water shortages in the fields are detrimental to larval growth and development, lotus roots in low-lying lands, drowning areas, ponds, and lakes that suffer from year-long accumulation of water and poor drainage suffer heavy damage, and there are fewer lotus roots in shallow paddy fields. occur.
Prevention and treatment of Lotus root food insects should take corresponding measures according to their habits. (1) The implementation of a paddy crop rotation, or exclusion of field water in the winter. (2) Remove weeds from Putian, especially Eyeweed and Beakgrass. (3) Improve soil quality. In mid-April to early May, before the lotus root sprouted, the water in the field was eliminated, and 50 kg of lime per acre was added to neutralize the acidity of the soil. This can prevent diseases and control the larvae of winter-feeding golden-beetles. It is also possible to apply 15-20 kg or 3% phoxim granules 2.5-3 kg per acre, and properly plow. The condition of the area is to apply 10-15 kg of ammonium sulfate per acre, and the effect is better. (4) Trapping the adult. In adulthood, insects are induced by eye dishes and the eye dishes are burned after spawning. (5) In the initial stage of larval damage, the soil of the lotus root area is sprinkled. Each acre of tea seed powder 15-20 kg or 3% phoxim granules 3 kg, or with 48% chlorpyrifos EC 150 ml water 1 kg spray mixing 30 kg of dry fine soil made from poisonous soil. In the middle of the night in Sakata, where it was sprinkled with clean water, the next day, 3 cm deep water was used to moisten Sakata and normal water slurry management resumed after 3 days. (6) Chemical control. Adult stage insecticide spraying with imidacloprid, farmland music (52.25% poisoning? cypermethrin EC), dichlorvos, and other drugs.
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