Aphids are one of the main pests of crops, with many species, many algebras, and rapid reproduction. It absorbs crop sap, makes plants weak and withered, and is a carrier of many viral diseases. In order to control the damage in agricultural production, the use of chemical pesticides has become an important means. However, over-reliance on chemical pesticides, especially the use of highly toxic pesticides, can cause pollution to agricultural products and the environment, leading to excessive pesticide residues in agricultural products affecting people's health. Therefore, it is necessary to use green control measures to control locusts.

The sweet and sour liquid sweet and sour liquid is formulated as wine: water: sugar: vinegar = 1: 2: 3: 4. Put the prepared sweet and sour liquid in the upper open container, which is usually placed in the plant spot where the aphids occur in the evening. The trapping effect is very remarkable.

The yellow plate has wings and has a strong tendency to yellow and orange. It can be applied to the yellow plate with No. 10 motor oil, Vaseline and so on. The size of the yellow plate is generally 15-20 cm square, inserted or hung in the field, and the yellow plate should be replaced in time after it is full of mites.

The willow worm has a strong tendency to smell from the willow. To this end, a certain amount of willow branches can be taken into a handle, placed in a plant site where a large number of aphids occur, and a large number of aphids can be trapped together for centralized killing.

The black light aphid has a strong phototaxis, and the black light made in advance is placed in a plant site where a large number of aphids occur, and the trapping effect is extremely remarkable.

Silver-gray film silver-gray has strong repellent effect on aphids. It can be used to hang silver-gray plastic strips in the field or cover crops with silver-gray mulch, which has a positive effect on the infection of aphids.

The main component of washing powder washing powder is sodium dodecyl phthalate, which has a strong contact effect on aphids. Use washing powder 400 ~ 500 times liquid, spray 80 ~ 100 kg per 667 square meters, even spray 2 ~ 3 times, can receive better control effect.

Plant dip juice 1. Soak 1 kg of fresh tobacco leaves with 10 kg of water, remove the tobacco leaves, add 10 kg of water, and add 10 kg of lime water (0.5 kg of lime) to the twice soaked juice. After mixing, it can be sprayed; 2. 1 kg of fresh orange peel, 0.5 kg of fresh pepper, mixed with mash, and then boiled with 10 kg of water, soaked for 24 hours, filtered and sprayed with immersion juice, this mixture It has a contact-killing effect, and the mites die soon after receiving the drug, and the effect of controlling the mites is significant; 3. smashing 1 kg of garlic, adding the same amount of water, and filtering the filtered solution with water 50 times; 4. taking the onion bulbs 200 Gram, immersed in 10 kg of warm water, filtered and sprayed after 4 to 5 days; 5. 400 g of fresh dandelion or 300 g of root, smash it, soak it in 10 kg of 40 ° C warm water for 1-2 hours, filter Juice, spray best when the fruit trees show leaves; 6. Other dip juice treatment, such as fresh peach leaves, fresh willow leaves, fresh ramie leaves, citrus seeds, etc., have curative effect.

The grass ash and urine washing liquid are treated with 2% to 3% of the ash ash, which can prevent the locusts; the urea, washing powder and water are formulated into a urine washing solution at a ratio of 4:1:100, and the effect of spraying the mites is over 92%, and It has the effect of foliar fertilization on crops.

The volatile smell of the plant-driven amaranth has a repellent effect on the aphids, and it can be mixed with other vegetables to reduce the density of the aphids and reduce the damage.

The natural enemies of natural enemies are seven-spotted ladybugs, heterosexual ladybugs, tortoise-shaped ladybugs, grasshoppers, scorpion flies and cockroaches. They should be protected and used to control the population of locusts in an insufficient amount. Inside.

Foliar spray fertilizer is sprayed with 10% ammonium bicarbonate solution, 0.5% ammonia aqueous solution and 2% urea solution, sprayed once every 7 days, and sprayed 2 or 3 times for the control of plants. The mites work well.

Eliminating the weeds on the edge of the insect source and the residual diseased leaves after harvesting are the main wintering hosts of the aphids. Therefore, it is necessary to thoroughly clean the fields before the winter, winter and spring, and remove the weeds in the fields. Chen Maochun, Shiyan Agricultural School, Danjiangkou City, Hubei Province

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