In recent years, the occurrence of Chinese rice blast has been increasing year by year, which seriously threatens rice production. Some rice fields have already become a disaster. According to several years of production practices, several simple and easy methods of prevention and control are introduced: Adult O. chinensis adults have green or yellow-green or brown body surface. green. One generation occurs in one year, wintering in the earth with eggs, and hatching from June to mid-July. The nymphs are generally 6 years old and the 1st and 2nd year old birds are concentrated in the fields, roadsides, dike, or low-lying and moist areas. Grass, 3rd instar can injure the rice field, pods peeling 5 times into adults, and in August is the peak period of emergence. Every day at 9:00 o'clock in the morning after sunrise and 4 o'clock in the afternoon, it is the most abundant. In the low-humidity steppe, the Oxya chinensis migrates to farmland after eating it. During the middle and late September, the eggs are laid over the winter and the eggs are prolific in the fields, roadsides, grasslands, and leeward sandy loam soils. The eggs grow into pieces, and the oocysts are outsourced. The depth of the oocysts in the soil is 0 to 3 cm. There are the following methods to control the Chinese rice borer: 1. Plow the paddy field to make it unable to grow weeds with a width of about 2 meters. One way to do this is to destroy the maggot egg mass, so that the quail eggs can't hatch; and second, stop the plutonium on the grassland from entering the rice fields. 2. Before the locusts enter the rice fields, a 2 meter wide medicine tape is used at the junction of the rice fields and the grasslands to kill the locusts without entering the rice fields. It is best to use 5% of Regent suspension agent for spraying the drug, spraying 20-30 ml of water per mu. This medicine has a long effective period of up to 20 days and is effective in controlling aphids. 3. When the mites enter the rice fields, they are sprayed with the EC insecticides such as 25% fast killing or 5% beta-cypermethrin, 25-25 ml/mu, which has both stomach and contact toxicity, and the liquid sprays on the rice. Leaves are not volatile.
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