There are two ways to control insects, one is by accompanying plants, and the other is by using natural materials.

1. Associated plant method: Intercropping two plants can achieve the effect of pest control. For example, intercropping green pepper with garlic, intercropping tomato with cabbage, intercropping onion with carrot, etc., all of which can have insect repellent effect.

2. Use natural materials to control insects:

1. Control insects with plant ash liquid. Plant ash 1 kg mixed with 5 kg of water, soaked for 24 hours, and sprayed with filtrate can effectively control aphids and yellow worms.

2. Prevention and treatment of diseases with brown sugar solution. Dissolve 3g of brown sugar in 5ml of clean water, add 1g of white yeast, put it in a greenhouse or greenhouse, stir once a day, and ferment for 15-2 days until a white film layer appears on its surface. Then add 1g of rice vinegar and 1g of shochu to the fermentation broth, and add 1kg of water. It is a good medicine for preventing and controlling bacterial spot disease and gray mold of cucumber.

3. Treating vegetable aphid with urine washing mixture. The mixed solution made of washing powder, urea and water according to the ratio of 1∶4∶4 can control vegetable aphid, and the insecticidal rate is over 9%.

4. Tie grass on the trunk to kill insects skillfully. Removing straw stalks and burning them centrally can reduce the wintering base of pests and get twice the result with half the effort.

5. Paint plywood to catch micro pests. Paint orange paint on both sides of the larger plywood, and then coat it with a layer of mixed oil of engine oil and butter after drying, and hang it in the orchard or vegetable garden, so that aphids, whiteflies, liriomyza sativae and other pests will be trapped. After a week, the painting will be changed and the mixing effect will be better.

Extended information:

Pest classification:

1. Leaf-eating pests: Most of them eat leaves of trees and lawns, which can eat up leaves when they are rampant, weaken the tree vigor, and provide suitable conditions for the invasion of borers such as Cerambycidae and beetles, which not only affects the normal growth of plants. This kind of pests mainly include LEPIDOPTERA dead leaf moth, boat moth, American white moth, Sophora japonica moth, Papilio, HYMENOPTERA sawfly and so on.

2. Needle-sucking pests: Needle-sucking pests are a large group of garden plant pests. They are small in size, and often suffer from inconspicuous symptoms at the initial stage, which is easy to be ignored by people. However, they are numerous, and often live in groups on twigs, leaves, buds, buds and fruits, sucking plant juice and plundering their nutrition, causing leaves and flowers to curl, and even the whole plant to wither or die. This kind of pests mainly include aphids, scale insects, whiteflies and psyllids.

3. Insect-eating pests: Insect-eating pests live in seclusion, with few natural enemies and strong individual adaptability. They eat the branches of trees with young insects, which not only destroys the transport tissues and causes the death of plants, but also forms criss-crossing insect paths in the xylem, which reduces the economic value of wood. This kind of pests mainly include Lepidoptera's bark beetles, Chalcopodidae, Elephantidae, Hymenoptera's tree wasps, Isoptera termites and so on.

4. Underground pests: Underground pests mainly inhabit the soil, feeding on newly sprouted seeds, young roots, tender stems and leaf buds of seedlings, which bring great harm to seedlings, and even lead to seedling shortage and broken ridges. This kind of pests mainly include Orthoptera's mole cricket, Flammulina velutipes, Diptera's fly and so on.

References:

Pests-Baidu Encyclopedia