Red spider harm is more common, most common in dry years.
The symptoms of the affected leaves are obvious, and the symptoms of fire are general.
Seriously caused the leaf to fall out, affecting the yield in the current year.
Regions vary from algebraic to 6 to 9 generations.
Female adults extend the generation, and the cracked soil has a home.
Spring weather is warm March day, overwintering adult insects appear in the field.
Upper buds are harmful to egg laying, and the larvae change in 7 to 8 days.
Since then, the generations have overlapped, and the generations have been more chaotic.
The temperature rise is shortened, generally a generation and a half days.
From May to July, the most critical is that the amount of rainy season will decrease.
However, if there is a drought, it is very easy to cause disasters and reduce production.
Prevention and control measures should be strict, and the prevention and preservation year should be prevented and preserved frequently.
In late August, september and a half, before the wintering of autumn.
Tie the bundle of branches into grass, untie them in early spring and burn them.
Scrape the coarse old warp skin again, and loosen the soil in time to hoe the tree plate.
Or use the film to put the disc, are conducive to the reduction of harm.
Pharmacy prevention and control grasp the key, before the first medication germinates.
Stone sulfur compound works well, before the second spray harvest.
The drugs used should be carefully selected, mites to the width of the tube.
Nisoran did not delay in coming, and destroyed Saulilai.
After three mcKene, the drugs used are rotated.
Author: Wang Tianli
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