Since mid-April, leeks in the open field have begun to be harmed by crickets, and the larvae and young stems of leeks have been eaten, causing wilting, yellowing and plant death of leeks, affecting the commercial and economic benefits of leeks.
Under normal circumstances, mid-April in spring and late September in autumn are the two peaks of the occurrence of cockroaches and should be treated as soon as possible.
1. The sweet and sour liquid traps and kills the adult. Preparation method of sweet and sour liquid: 0.5 kg sugar + 1 kg vinegar + 7.5 kg water + 30 g crystal trichlorfon or 20 ml dimethoate solution, 15 pots per acre, trap and kill adult insects.
2. Pesticides are used to control larvae. 0.3% per acre with 4 kg of matrine or 48?
3. Crush liquid calcium cyanamide. After harvesting one knife per acre, 4 liters of liquid calcium cyanide can be applied to each acre of water, which can prevent and control the damage of earthworms, increase fertilizer efficiency, and increase yield.
A seedbed or seedling bed is the local soil environment in which seeds are planted. Often it comprises not only the soil but also a specially prepared cold frame, hotbed or raised bed used to grow the seedlings in a controlled environment into larger young plants before transplanting them into a garden or field. A seedling bed is used to increase the number of seeds that germinate.
Greenhouse Seedling Bed,Stainless Greenhouse Seedling Bed,Greenhouse Seedling Nursery Bed
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