Hanging filaria, also known as small cabbage moth, small green worm, hanging silk maggot, is a genus of lepidoptera, a genus of rochi moths, distributed throughout the country. At present, the resistance of the small vegetable moth (hanging filarial worm) in most areas is already very serious, and many conventional drugs are like bathing with insects after application!
Hanging filarial insects mainly harm kale, cabbage, rapeseed, cauliflower, mustard greens, broccoli, radish and other cruciferous vegetables.
First, the hazard characteristics:
The young larvae only feed on the leaf flesh, leaving the epidermis, forming transparent spots on the leaves, that is, "opening the skylight",
3rd to 4th instar larvae can eat the leaves into holes and gaps, and in severe cases the whole leaves are eaten into a network.
At the seedling stage, the heart leaves are often concentrated as a pest, affecting the heart. On residual plants, young stems, young pods and grains are endangered.
While the larvae harm the leaves, they can also infect vegetables with downy mildew, soft rot, gray mold and other diseases.
Peak hazard period: mid-May to late June, late August to late October.
Second, why is it difficult to control the hanging filariae?
1, hanging filarial worm is very easy to break out of harm, and the insect body is small, like to harm on the back of the leaf, spraying is not in place, increasing the difficulty of prevention and control.
2, the small vegetable moth body is tough, can withstand both high temperature, but also can withstand the cold, very tenacious.
3. The resistance of the small vegetable moth is insect-free and invincible, and has gradually replaced the vegetable insect to become the number one resistant pest of vegetables!
According to relevant literature and news reports, the cabbage moth has developed different degrees of resistance to more than 50 kinds of insecticides such as organophosphorus, carbamates and pyrethroids.
4. Only pay attention to the control of hanging filarial larvae, and ignore the control of their adult insects, which is the root cause of the more and more hanging filarial insects are prevented.
5. Cruciferous vegetables are continuously cultivated year after year, resulting in large insect population bases and import migration.
Third, comprehensive control of resistant hanging filariae
1. Remove the source of overwintering insects
Before colonization, insist on cleaning up the diseased leaf residues on the field, burn if you can burn, and take them away from the field for fertilizer treatment if you can't burn, so as to reduce the source of harmful insects.
2. Avoid large-scale continuous works
The planting layout is reasonable, and try to avoid large or contiguous cruciferous vegetables to prevent the recurrence of insect sources and the gain is not worth the loss. The degree of harm of the intercropping moth will be lower than that of continuous planting!
You can try to intercropp with celery, shallots, garlic, leeks, tomatoes, peppers and other vegetables, and rotate with melon beans, eggplant fruits, potatoes, onions and garlic for more than 2 years.
3. It is recommended to use special drugs
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It takes 5 minutes to achieve the effect of the drug, 20 minutes to start dead insects, dry water insects to die, the dead insect rate is as high as 98%, and the effect is special for Yunnan and Guangxi high-resistance areas!
This product is a multi-compound product, to ensure the effect, and continuous use of no resistance, high safety, strong stability, safe and pollution-free for all crops.