Hazard characteristics and control methods of corn borer

Locust pests are common pests and diseases in the corn growing season, which have a negative impact on the growth of corn, and will have a great damage to the yield and quality of corn. Then how to prevent corn mites? Let us introduce the prevention and control methods of corn mites.

Characteristics of corn mites

Cheng, Ruoqi sucks plant tissue juice, causing the leaves to turn yellow or red, affecting growth and development, and when the plant is dead, it will die. The corn borer clusters in the heart leaves, secreting honeydew when the leaves are damaged, and produces black mold. Don't be sorghum.

Morphological characteristics of corn borer

The wingless parthenogenetic corpus callosum is long and ovate, 1.8 to 2.2 mm long. The live insects are dark green, with a thin white powder, black appendages, red eyes and complex eyes. The 7th section of the abdomen is black, and the 8th section has a horizontal belt in the back and a netted surface. Tentacles, ankles, feet, abdominal tubes, and tails are black. The antennae are 6 knots, the length is 1/3 of the length of the body, the squat is short and short, and the base of the midfoot is not 1.7 times. The end section is 1.7 times of the base width. The abdominal tube is long cylindrical, the end is contracted, and the abdominal tube is covered with a tile pattern. The tail piece is conical and has 4 to 5 hairs. The winged parthenocarp has a long oval shape with a body length of 1.6 to 1.8 mm. The head and chest are black and bright, and the abdomen is yellowish red to dark green. The tentacles are 6 knots shorter than the body. The abdomen has 1 pair of large marginal spots in 2 to 4 sections, the middle and middle sections in the 6th and 7th sections, and the whole section in the 8th section. Others are similar to the wingless type. The egg is oval.

Corn borer life habit

The Yangtze River Basin is more than 20 generations a year. In winter, it is made in the heart of barley or in the form of parthenogenesis, and if it is in the grass, it will overwinter. In March and April of the next year, activities began to be harmful. In April and May, a large number of winged mites were produced during the yellow ripening period, and they were moved to spring corn, sorghum, and paddy fields. The aphid lifetime camp is parthenogenetic, and the number of insects increases rapidly. North China from May to August is seriously harmful. High temperature dry and early years occur more. Natural enemies include heterosexual ladybugs, seven-spotted ladybugs, snail-like ladybugs, scorpion flies, grasshoppers and parasitic wasps.

Corn locust pest control method

(1) On the basis of forecasting and forecasting, according to the amount of sputum, check the percentage of natural enemies' sputum and climatic conditions, determine the occurrence of the cockroaches, determine the type and period of use, and find that the central stalk can spray 2.5% phoxim powder. Or 50% phoxim EC 1500 times solution.

(2) When the rate of sorghum is 30% to 40%, the occurrence of "oil-bearing plant" (referring to honeydew) should be carried out in the whole field, and the first is to apply phoxim sulphate, 50 per 667 square meters. 50 g of phoxim emulsifiable concentrate is diluted with 500 L of water and sprayed on 20 kg of fine sand, and mixed while spraying, and then uniformly spread the mixed poisonous sand on the plant. It can also spray 50% anti-Converse WP 2000 times solution, 50g per 667 square meters or 1.5% dimethoate powder, 2~3kg per 667 square meters.

In addition, 1% phoxim granules can be applied in the bell mouth for 1 to 2 kg per 667 square meters, which can treat both horses, corn borers and armyworms. In addition, 10% imidacloprid wettable powder 1500 times solution or 3.5% fluoronitrile·bromo emulsifiable concentrate 1500 times solution, 25% thiamethoxam water dispersible granule 6000 times solution, 20% imidacloprid water solvent 5000 times solution, 10 days apart 1 time, continuous control 2 to 3 times.

The above article is about how to prevent corn mites, how to control corn mites, thank you for your inspection and support, and wish everyone a bumper harvest in the harvest season.

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