What pests and diseases are susceptible to in autumn beans? How to prevent it scientifically?

1.Aphids. Prevention and control methods:

It is recommended to hang a yellow worm board. The principle of insecticide is to use the phototaxis of aphids to yellow, which can effectively kill migratory aphids. 2.

Bean borer and noctuidae pests. Prevention and control methods: Farmers can hang insecticidal lamps in the field to kill adults.

Adults are what farmers often call moths. This principle is to use the phototaxis of moths at night. Occurrence of caterpillars.

Leaf spot, rust, blight, anthracnose, aphids, these are relatively common, you need to pay attention to the density of planting, be sure to pay attention to the use of pesticides.

Spotted loon flies, pod borers, ground tigers, thrips, double bean borers, spray pesticides on time, and pay attention to the cleaning of diseased plants.

Most susceptible to anthrax and pod borer.

Including cowpea rust, cowpea virus disease, etc. In terms of prevention and control, spraying can be used to kill aphids in the early stage, especially in drought years, and more attention should be paid to aphid prevention; In addition, the cultivation management was strengthened to enhance the disease resistance of plants. I think that the right way can still effectively prevent the pests and diseases of autumn cowpea.

In cowpea charcoal maggot disease, cowpea varieties with high resistance to charcoal maggot disease should be selected when selecting seeds, and planted in a well-drained place. Cowpea mosaic disease, to do a good job of aphid prevention and control in advance, can be sprayed with 1000 times of plant disease spirit or 200-300 times of anti-toxic agent No. 1 for spraying control.

Some pests and diseases are cowpea borer and pod borer. For the land with severe disease, it is necessary to implement 3-4 years of rotation, and high silicon or deep ditches can be used to clear the ditch and drain it frequently to reduce humidity.

It can be said that the leaves will be emptied, and it can also lead to problems such as rotten roots, yellow leaves, and so on. In this way, it is necessary to fight some dichlorvos in advance, so that it can be well prevented.

Cowpea in the south of the hometown of the old farmer of Qixing, the climate is warm, the rain is abundant, two seasons of cowpea can be planted throughout the year, the first season is planted in early April, covered with plastic film, to prevent low temperature, more rain, resulting in cowpea rot, slow growth and development. The harm in the fruiting period is more serious. This period is mainly due to the weakened disease resistance of the beans and their susceptibility to diseases.

Rust mainly affects the leaves of cowpeas. From the initial yellow dots, it gradually spreads throughout the leaf, and eventually causes the leaf to lose the ability to photosynthesize, wither and fall.

<> amount of rust is also high. Its root system is developed, it likes temperature and heat, but it is not frost resistant, it has a lot of pests and diseases during the growth and development period, there are coal mold, also called leaf spot, virus disease, anthracnose, root rot, blight, horn spot, gray mold, rust, etc., and now the infection of the disease. The disease.

It mainly harms the stems, leaves, pods and so on of cowpeas. Generally, it can happen in the open field and in the greenhouse in summer. Once infected with this disease, if the correct control measures are not taken, cowpea leaves will fall, affecting yield and commerciality.

Cowpea rust overwinters on diseased carcasses and dead leaves. Under the right humidity and temperature conditions, the spores begin to recover and then spread with the help of air currents, invade the cowpea plant and continue to survive in the cowpea, repeating the above process, and the infection continues.

It can avoid the direct invasion of rust bacteria. Remove diseased residues and reduce the source of infection: After the harvest of spring beans, the dead seedlings of the residual plants are collected and burned to reduce infection**, and the soil is disinfected and sterilized with lime.

According to the previous planting experience, the harm of Phaseolus vulgaris can be reduced through a combination of agricultural control and chemical assistance. Before mastering the specific prevention and control methods, we need to understand the symptoms and characteristics of rust and the incidence law of Phaseolus vulgaris, so that rust is a fungal disease, it can be sprayed or flushed with Trichoderma harzianum, supplemented once a month, and applied once every half a month during the high incidence period, which can effectively prevent and control the occurrence of fungal diseases.

Remove the disease and reduce the source of infection. After the beans are harvested, the dead seedlings are collected and burned to reduce infestation**. Disease-resistant varieties were selected, carbendazim was dressed before sowing to isolate virus infection and improve seed germination rate.

It is recommended to plant in two rows or in a single row, which is easier to remove stagnant water and dredge and breathe, which is not conducive to the landing and invasion of spores. Reasonable crop rotation should be avoided for planting in fields with leguminous or peanut crops. Sufficient basal fertilizer, early top dressing, phosphorus and potassium fertilizer were applied to enhance the root nodule activity, the plant growth was stout, the leaves were thick and green, and the disease resistance was enhanced.

Nutrient solutions should be replenished in a timely manner, and water and fertilizer should be well managed, and pesticides should also be sprayed.

When planting beans, you need to loosen the soil first, the purpose is to increase the contact force of the soil with air, and then bury the seeds of the beans directly into the soil, cover the soil and then water it to keep the soil moist, so that the seeds can germinate and grow faster. Carob diseases and insect pests include: carob red root disease, carob rust, carob anthracnose, carob spot blight, etc.

Strengthen the management of carob growth period, increase the application of organic fertilizer, and appropriately apply more phosphorus and potassium fertilizer to improve plant disease resistance and reduce the probability of anthracnose damage. In order to activate the positive energy of plant ecological growth, improve the water and fertilizer absorption of plants, and promote the rapid expansion and development of carob, high yield and high quality.

The planting of carob is generally in March to April, and the common diseases are carob rust, anthracnose, pod borer, and the prevention and control of anthracnose should start from the seedling stage, and generally hit the medicine twice.

Before and after Qingming; spotted disease, aphids, blight, blight; Strengthen the management of the field, proper fertilization and fertilization, and an appropriate amount of spraying of some pesticides for prevention and control.