The spider is a mites with 4 pairs of feet. It is a pest that often occurs in wheat. Wheat spiders suck the wheat sap, causing small yellow-white spots, which are smaller than the wormholes sucked by the mites, and generally do not cause necrosis, but the density can also cause the plants to die or not to head. When a tablet occurs, the worm area is often shorter than the surrounding healthy wheat, and it looks like it has been burned by fire. Therefore, the spider is also known as the fire spider.
Wheat spider body color red brown, also known as red spider, mainly wheat spider and wheat long-legged spider, the obvious feature of the long-legged spider is that the first pair of feet is twice as long as the second pair. In the dry land of northern China, many long-legged spiders occur, with 3-4 generations a year. Spring is the main hazard. After the postnatal stage of wheat is pushed back, it is necessary to pay attention to the post-monitoring and prevention work.
The requirements of the two kinds of spiders are not consistent. The long-legged spiders of the wheat are arid, the temperature is 15 °C ~ 20 °C, while the wheat spider likes to be rainy and mild and slightly lower temperature, 8 °C ~ 15 °C.
The spider can be parthenogenetic, has a pseudo-death habit, and likes to live in groups. Therefore, rainfall has an inhibitory effect on them, combined with irrigation, the earthquake can drown some wheat spiders.
In addition, the removal of weeds in the field, especially grass weeds, can reduce the source of insects.
Chemical control wheat red spider can use 15% ketone emulsifiable concentrate 2000~3000 times liquid (20% broom net wettable powder, 3000~4000 times liquid), or 1.8% avermectin (worm gram) 5000~6000 Double liquid, 5% calcium salt soluble granules 3~4 grams per acre, or use alkyne (Keite), benzophene (Xipos), dimethyl ether (螨克). If you want to treat other pests, you can also use fluvalinate, chlorpyrifos, flubenzuron (calorie) and other agents.
(Senior Consultant of Sinofert, Professor of China Agricultural University, Xiao Yueyan)
Farmers Daily
Wheat spider body color red brown, also known as red spider, mainly wheat spider and wheat long-legged spider, the obvious feature of the long-legged spider is that the first pair of feet is twice as long as the second pair. In the dry land of northern China, many long-legged spiders occur, with 3-4 generations a year. Spring is the main hazard. After the postnatal stage of wheat is pushed back, it is necessary to pay attention to the post-monitoring and prevention work.
The requirements of the two kinds of spiders are not consistent. The long-legged spiders of the wheat are arid, the temperature is 15 °C ~ 20 °C, while the wheat spider likes to be rainy and mild and slightly lower temperature, 8 °C ~ 15 °C.
The spider can be parthenogenetic, has a pseudo-death habit, and likes to live in groups. Therefore, rainfall has an inhibitory effect on them, combined with irrigation, the earthquake can drown some wheat spiders.
In addition, the removal of weeds in the field, especially grass weeds, can reduce the source of insects.
Chemical control wheat red spider can use 15% ketone emulsifiable concentrate 2000~3000 times liquid (20% broom net wettable powder, 3000~4000 times liquid), or 1.8% avermectin (worm gram) 5000~6000 Double liquid, 5% calcium salt soluble granules 3~4 grams per acre, or use alkyne (Keite), benzophene (Xipos), dimethyl ether (螨克). If you want to treat other pests, you can also use fluvalinate, chlorpyrifos, flubenzuron (calorie) and other agents.
(Senior Consultant of Sinofert, Professor of China Agricultural University, Xiao Yueyan)
Farmers Daily
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