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Damage characteristics
Adults, eggs, larvae, cockroaches, adults and larvae can all be formed. Adults eat leaves and vegetables are most severely affected by seedlings. After the cotyledon of the first seedling was eaten, it could cause the whole plant to die, resulting in the lack of seedlings and ridges. After the slightly larger seedlings were eaten, many holes were formed in the true leaves and they were mesh-like. In the stay of farming, it mainly damages buds and tender pods. The larvae damage the roots and eat the root bark, often snapping the fibrous roots, causing wilting or death of seedlings or young plants. After roots of radish and other crops are damaged, many dark spots are formed on the root surface, and finally the whole root system turns black and rot. Affected plants are susceptible to bacterial bacterial soft rot infection from the wound.
Morphological characteristics
The adult is a dark brown, long, oval-shaped beetle with a body length of 1.8-2.4 mm. There is a yellow longitudinal spot on each side of the elytra, the middle is narrow and curved, and the hind leg section is inflated. The jump is good, and the truncated section is brownish-brown. The mature larvae are cylindrical, yellowish-white, and have a body length of about 4 mm. Each section has an invisible sarcoma and fine hair. Eggs are oval, yellowish, translucent and approximately 0.3 mm long.蛹 Oval, milky white, approximately 2 mm long.
Control methods
The pests have a strong ability to transfer diseases, and the prevention and control of diseases and insect pests should be based on the unified prevention and control of vegetable crops in the region, and priority should be given to green prevention and control measures based on agricultural control.
Agricultural control: Completely remove vegetable fields and surrounding deciduous remnants and weeds before winter, deep tillage soil for 7-10 days before sowing, rotate with spinach, lettuce, carrots, onions, garlic, and other crops, or with basil. The volatile odor of vegetable crops is intercropped, mixed or intercropped, and cruciferous vegetables are repeatedly prevented from being replanted; conditional plots can be used to lay mulch and adult worms are spawned at the roots.
Physical control: In combination with other pests, black light or frequency-vibration insecticidal lamp is used to trap and kill adult insects; placing yellow or white armyworm board at 25 cm from the ground, 30-40 pieces per mu, can also reduce adult size Quantity.
Chemical control: Soil treatment kills the larvae and ticks of the yellow-bellied flea beetles in the soil and can be used to irrigate the roots with 300 g/l Chlorothamate-fluthione suspension; seed coating treatment protects the seedlings from the yellow-legged flea beetle larvae. Injury, optional 70% thiamethoxam seed treatment dispersible powder; foliar spray to kill adults, optional 25% thiamethoxam water dispersible granules, 15% bismuth microemulsion, 10% cyantranilamide can be dispersed Oil suspension and other agents.
Precautions
Spray before 9 o'clock in the morning or after 6 o'clock in the afternoon. The spray should be sprayed through the blades to wet the soil. If the field is wider, the insect should be surrounded by spraying it first and then spraying it around the center. If the field is long and narrow, it can be sprayed at one end and then sprayed from the other end to prevent the adult from fleeing. Application should strictly follow the safety interval.
Yellow stripe hop, also known as yellow stripe, dish dumplings, soil fleas, yellow fleas, dog locusts. Damage crops mainly include cruciferous vegetables such as cabbage, broccoli, cabbage, rapeseed, radish, and rapeseed. They also harm solane fruits, melons, and legumes.