Wheat spiders are a common pest of wheat. As the temperature rises, wheat spider mites rise. As the weather is dry this year, wheat spiders will suffer serious damage and must be prevented and treated in time. Wheat spiders are mainly wheat spiders and wheat legged spiders. They are red-brown in color, also known as red spiders.
One, hazard:
The wheat spider sucks the wheat sap and first damages the lower leaves of the wheat, and gradually spreads to the middle and upper parts. Yellow-white spots initially appeared on the victim's leaves. Afterwards, red spiders increased and red patches appeared on the leaves. Partial or even all of the affected leaves curled up and turned yellow or red-brown. The wheat plants were poorly grown, the plants were short, the grains were small, and the seed setting rate was reduced. , The yield dropped, and the whole plant was dry when severe. When the density is high, it will cause the plant to die or fail to head. At the time of the occurrence of the piece, the insect area is often shorter than the surrounding healthy wheat, and it looks like it has been burned.
Second, control methods:
1, wheat spiders can be parthenogenetic, there are false death habits, hi group home. Rain has an inhibitory effect on them, and it can combine irrigation and quake to drown some wheat spiders.
2, weeding the field in time, on the chemical weeding effect is not good land, we must promptly adopt manual weeding methods to eradicate weeds, especially grass weeds, can reduce the source of insects. To effectively reduce its damage. Practice has shown that in general wheat fields where there are no droughts, few weeds, and good wheat growth, wheat spider mite is difficult to occur.
3, can choose 20% broom net WP, 3000-4000 times liquid or 2% avermectin 6000 times liquid or 15% ling Ling 3000 times liquid spray control or 1.8% worm g 5000-6000 times liquid The control effect can reach more than 90%.
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