To control cabbage radish Pieris caterpillars, do not spray pesticides, just use soil methods?

Chinese cabbage and radish are widely cultivated in our country, suitable for both north and south.
The southern Chinese cabbage is commonly known as yellow sprouts, and the northern Chinese cabbage is the most common main vegetable to eat in winter
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Because the price of Chinese cabbage is relatively low, the fiber is low, the net vegetable rate is high, and it is suitable for the general taste.
Cabbage has the homophony of "hundred fortune".
In modern society, some people also predict the "price of cabbage in buildings", which shows that cabbage is the most popular kind.
One of the widely accepted vegetables
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Because cabbage is rich in nutrients and has a crispy taste, the cabbage caterpillars also want to share a slice of the planted cabbage, so they specifically find the cabbage that is suitable for spawning and breeding offspring to lay eggs and breed their offspring.
Create a good living and growth environment for your offspring
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If there are more cabbage worms, the cabbage we grow will be occupied by the cabbage worms.
In the process of growing cabbage, most growers will spray pesticides to prevent and control the cabbage worms.
Spraying pesticides saves time and effort, and the control effect is good.
The cabbage has no traces of damage caused by cabbage caterpillars.
Not only does the cabbage grow well, but it also achieves the effect of "selling a piece of skin", which naturally greatly improves its competitiveness in the market
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Some people are worried, will spraying pesticides on cabbage affect our health? However, at this point, everyone can rest assured that our country has very strict management of pesticides.
Most friends who grow vegetables such as cabbage and radishes will consciously choose bio-insecticides and other high-efficiency and low-toxic pesticides.
To prevent and control cabbage pests and diseases, discard high-residue, highly toxic pesticides.
Therefore, cabbage and radishes on the market basically meet our food standards
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Some friends have suggested that if the cabbage radish is not sprayed with pesticides, wouldn’t it be more assured to eat? If the cabbage is not sprayed with pesticides, doesn't the cabbage caterpillars have all the cabbage for themselves? Without spraying pesticides, is there any way to control Pieris rapae? Let me share with you how to control Pieris rapae without spraying pesticides.
Those who are interested can try it by themselves.
It doesn’t work in the end.

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1.
Add insect nets and choose fields where no vegetables have been planted.
The soil must be loose and fertile, organic matter content greater than 5%, and water irrigation conditions.
Cabbage is covered with white insect nets from sowing to harvest to block the outside world.
The cabbage worms in the environment come to lay their eggs.
If the Chinese cabbage is in autumn in the north, shortly after the National Day, after the cold air arrives, even if the covering insect screen is removed, the pieris caterpillars cannot raise much wind and waves at low temperatures.
Come
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2.
Spraying phosphate fertilizer, the adult cabbage caterpillars dislike the smell of phosphorus the least.
Spraying superphosphate extract on the grown Chinese cabbage radish can significantly reduce the cabbage caterpillars.
The adult caterpillars come to lay eggs.
In a vegetable garden, five lines can be separated without spraying.
Spray the superphosphate leaching liquid directly on the Chinese cabbage with pesticides, leaving a row without spraying the superphosphate leaching liquid.
When the eggs turn gray, that is when the cabbage caterpillars are about to hatch.
At this time, you can spray insecticide and egg killer to eliminate the larvae of the cabbage caterpillars
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If all the cabbage in the garden is sprayed with superphosphate leaching solution, the adults of Pieris rapae will still lay their eggs on the cabbage sprayed with superphosphate because they cannot find a suitable place to lay eggs, which will not be able to prevent insects
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Spraying the superphosphate leaching solution can also spray the eggs during the egg laying period of Pieris rapae.
Under the effect of phosphorus, the hatching rate of the eggs will be greatly reduced, which can play the purpose of preventing Pieris rapae
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Generally, the concentration of superphosphate leaching solution can be 1% to 3%
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3.
Spraying Beauveria bassiana to collect the remnant silkworm white zombie bodies, or other caterpillars, mash the white zombie bodies, and then catch some cabbage caterpillars, mash and soak these cabbage caterpillars together with the beauveria bassiana, about Place it for one day, and spray it on the cabbage with water on the second day.
The newly hatched larvae of Pieris rapae have very low resistance to diseases.
Beauveria bassiana will soon be successfully inoculated on Pieris rapae to achieve the goal of using insects to control insects and bacteria to control insects.
Purpose
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Source: Muyu Tingfeng