Alas, the farmers are also known as nematodes and slugs. Since spring last year, farmers have often asked how to prevent bogus worms on vegetables, and there is a tendency for them to gradually worsen.
Cockroaches mainly damage seedlings, young leaves and tender stems of cruciferous families, solanaceous vegetables, and melons, leeks, flowers, etc., and eat them into holes or nicks, excreting faeces and secreting mucilage to contaminate vegetables.
First, the morphological characteristics
Adults are 30 to 60 mm in length and 4 to 6 mm in width when straightened. Its shape is spindle-shaped (narrow in both ends, wide in the middle), and its body color is dark brown, gray-brown, yellow-white, gray-red and other types. There are two pairs of rod-shaped protrusions (tenacles) on the head, and an elliptical mantle on the front of the body back, which can secrete mucus and leave a bright trace in the area where it crawls.
Second, living habits
Adults or larvae are allowed to overwinter under wet soil in the roots of plants. From May to June, a large number of activities in the fields were harmed. During the summer, the temperature increased, the activity weakened, and after the autumn climate was cool, the activity was also harmed. Occurs in the protected area for a longer period of time. Afraid of light, the strong light burns for 2 to 3 hours, so it is nocturnal and starts to move from early evening. It peaks at 10 to 11 in the evening. Before dawn, it gradually dive into the earth or hidden place. Strong against hunger, unable to eat in the absence of food or poor conditions. It happens when it is dark and wet.
Third, comprehensive prevention measures
1. Completely remove field and surrounding weeds before planting, plough the sun and deteriorate its habitat. After planting, timely eradicate the weeds in the field and the ground and clear up the breeding grounds.
2. The use of sorghum cultivation, mulching, film-breaking and other methods are conducive to the production of vegetables, which can significantly reduce the damage caused by earthworms.
3. Lime zone in the gully, seedbed or between the crops in the evening, using 7 to 7.5 kg of lime per acre, to prevent the leaves from falling onto the surface.
4. Trapping: In the ridge room in the evening to scatter lettuce, cabbage, cabbage leaves, heap piles or drop some beer as bait, then open the leaves in the morning to kill.
5. Toxic soil. Seed germination or seedling, after rain or in the evening with 6% Mita kill snail granules 0.5 ~ 0.6 kg, mix 5 kg of fine sand, spread evenly.
6. Spray control. If the area of ​​the dam is small, use 1% saline or 1000 times of copper sulfate to spray the whole plant after 4:00 pm or before the early morning. The severely damaged plot can be sprayed with 900 times liquid of extermination.
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