At present, it is a good time to grow autumn cabbage, and if you want to obtain high yields, in addition to daily management in place, the most important thing is to pay attention to the prevention and control of diseases and insect pests. Recently, many farmers have reported that there are many nocturnal moth pests in their own autumn cabbage, and the harm is more serious. So how to control nocturnal moth pests? Let's take a look.
Pathogenesis of nocturnal moth pests
Nocturnal moths mainly include twill moths, beet moths, kale moths, etc., usually in August and September is a high incidence period. Among them, the cabbage nocturnal moth mainly harms open-air planting of cabbage and cabbage; The twill moth prefers a warm and humid environment, so it is beneficial to its pest-prone autumn during the rainy season; The beet moth is commonly planted in summer shacks, often harming crops such as tomatoes and green peppers.
Hazard characteristics of nocturnal moth pests
When the nascent larvae of the nocturnal moth harm Chinese cabbage, they only nibble on the back of the leaves. After the larvae gradually disperse the damage, they can eat the leaves into only leaf veins, and can enter the leaf bulb to feed, and eat the leaf bulb and eat it empty.
Control methods for nocturnal moth pests
1. Black light
During the nocturnal moth pest-prone period, the phototropism of adults is used to concentrate on eliminating adults. Can be set up a black light, the lamp should be 35 ~ 60 cm higher than the cabbage, wait for 10 ~ 15 cm put a basin of water, dripping kerosene in the water, to prevent the adult worms from escaping.
2. Sweet and sour wine venom
You can mix well with 3 servings of brown sugar, 1 part of wine, 4 parts of vinegar, 2 parts of water, and add a little bit of insects. When used, put the venom into a basin, place it on a tripod 1 meter above the ground, cover it during the day, open the lid every night to trap the moth, check the amount of the moth in the next morning, and replenish the vinegar once.
At present, most of the autumn cabbage planted is basically in the seedling stage, and the climate characteristics after autumn are also humid and rainy, which is conducive to the frequent occurrence of nocturnal moth pests, so growers must do a good job of prevention and control measures in advance, which can effectively avoid the problem of autumn cabbage production reduction.