Rice larvae are commonly known as red worms and red nematodes. The larvae damage the young roots and shoots of rice, causing floating seedlings, and feeding on ungerminated seed embryos and endosperm, so that the seeds can not germinate, and rice fields and live fields are seriously damaged. It is necessary to timely carry out pesticide control. Adults are small moths with shorter wings than the body. When they stop, the forefoot lifts up and down, the larvae are red or yellowish, and the front and back of the chest have a limb. 2-3 generations occur every year, and the first generation is harmful to rice. Overwintering in weeds with kidneys and adults. Adults appear in early May of the second year, lay eggs in late May, and hatch into larvae in 3-4 days. Due to the low temperature in the previous period, the seedling period was prolonged after the seedlings were inserted, causing the rice grain to occur in Changtu County. The rice in 7 townships such as Tongjiangkou Township, Taiping Township, Changtu Station Township and Baoli Town were damaged to varying degrees, covering an area of ​​1,100 mu. The seedlings suffer from slow growth, the white roots are few and short, and the leaves are 10%-20% withered; the heavy ones all die of yellow. Control methods: 1, agricultural control: draining the field for 2-3 days, can inhibit the damage of rice shake mosquitoes. Changing water and breeding for dry nursery can reduce the damage of rice chironomids. 2, chemical control: 1 with 90% crystal trichlorfon 10-15 grams, add water 10-15 kg, sprayed in the rice bushes when the water depth is about 4 cm. 2 After draining the field water, stop for one day and hang a small bag containing insecticide trichlorfon in the water inlet. When the irrigation water depth is about 3-4 cm, stop filling the water inlet and kill it after 12 hours. larva. 3 1 kg of 5% phorate granules per acre, mixed with 15 kg of soil (sand), can cure other pests, the effect is very good.
Expanded Metal Mesh,Stainless Steel Expanded Metal Mesh,Expanded Metal Sheet
Gabion And Mattress Co., Ltd. , http://www.hbmeshfence.com