The method of killing insects without pesticides

Too many pesticides will affect the growth of plants, so many farmers do not like to use pesticides. But pests are rampant, is there any way to kill pests without pesticides?

1. Insecticidal methods of plant ash

Plant ash can be used to control onion flies, root maggots, aphids, beetles and so on. There are three methods: first, soil application, 30-40 kg of plant ash per mu can be used to cultivate ditches to control rhizosphere pests; the second is direct spraying, when the dew is not dry in the morning after grinding. 1-2 kg of plant ash per mu is sprayed on the damaged part of the pest. The third is to spray plant ash solution, soak 3 kg plant ash in 10 kg water for 3 days, then spray plant ash extract after filtering residue, the spraying amount is 50 kg per mu.

2. Tobacco pest control method

Tobacco pest control is mainly used to control aphids, bedbugs, maggots and so on. Before preparation, take waste tobacco and water according to the ratio of 1: 40, cut up the tobacco leaves, soak them in 10 parts of boiling water and cover them, knead the soaked tobacco leaves until the water temperature is about 20 ℃, remove the tobacco leaves until there is no thick juice, put the tobacco leaves into the other 10 parts of water and further knead evenly, after 4 times changing water and kneading well, the filter residue is removed from the tobacco leaves, and the tobacco juice is fully mixed for insect control in the field, and the spraying amount is about 50 kg per mu.

Third, the insecticidal method of castor leaves

It can be used to control various pests, such as vegetable aphids, cabbage worms, maggots, ground tigers, beetles, Plutella xylostella and so on. You can add 3-5 times as much water to the castor juice and spray it on the leaves after soaking for 12 hours. You can also add 5 times as much water to castor oil, rub it and soak for 12 hours. You can spray it on sunny days and in the evening, using 20-40 kilograms of potion per mu. Pay attention to the necessity of using it.

Fourth, the method of killing insects with chili.

Take 500 grams of fresh chili peppers (the hotter the better), add 15-20 kilograms of water, boil for 10-15 minutes, filter out the juice, add 100-125 grams of washing powder while hot, cool, add 50 kilograms of water to two bags of eyebrow, mix well and spray. The method can be used to control pests such as corn borer, rice planthopper, rice borer, leaf borer, aphids, red spiders, tigers and so on.

5. Insecticidal method of onion and garlic

Mash garlic and onions, 20 grams each, wrap in gauze, soak in 10 kilograms of water for 24 hours, then remove from the gauze bag. This potion can be used to control pests such as beetles, aphids and red spiders.

VI. Flour insecticide

At about 12:00 at noon, 250g wheat flour was sprayed evenly on the other side of the damaged leaves of the red spider by adding 7.5-8kg water. Ten minutes later, all the red spiders were glued to their legs by flour and died on the other side of the leaves. This method also applies to vegetables, fruit trees, cotton and other crops.

7. Baking soda to prevent disease

Spraying 50 kg water with 0.2% concentration of baking soda solution, that is, 100 grams of baking soda solution, had a good control effect on cucumber and Chinese cabbage powdery mildew, anthracnose, downy mildew and cowpea anthracnose, with a control effect of 93.1%. It can also be used to treat rice blast. Mixed with isopropylthiamine, tricyclazole, etc. The effect has been greatly increased. However, it should not be mixed with acidic pesticides.