In recent years, vegetables, "chicken claw madness" incidence is higher and higher, the performance of the vegetables for large areas of leaf curl, especially the most serious young leaves, and ultimately fall off the light, resulting in a large reduction in vegetable production, a serious decline in quality. Some farmers can not figure out "chicken claw crazy" why happen, in fact, the real culprit is the tea mite.

Tea yellow mite, also known as yellow tea mite, originally a tea pest, omnivorous, can harm more than 30 families and more than 70 kinds of plants, in the main harm on the vegetable potato, eggplant, pepper, tomato, melons, beans and so on.

Hazard symptoms: mainly harming young leaves, young stems, flowers, young fruits, especially in the leaf has not yet unfolded the gap in the harm, has a tendency to tenderness. After harming the leaves, the leaves become thin to the back of the curl, leaf thickening stiff, leaf back oil stained yellow-brown. Flower buds can't bloom or become deformed flowers and fall off after being victimized. Young fruit damage, sepals, fruit stalk surface rough, tomato fruit skin cracking; tomato shoulder cracking; bean skin thick and stiff, melon damage, young leaves and growth points stop growing.

Occurrence time: generally in late May to early June began to occur, late June to mid-September is the peak period of occurrence, July to September the most serious damage.

Control measures:

1, remove field weeds and field dead branches and leaves, leveling the land, destroying the overwintering place, eliminating the source of overwintering insects.

2, early spray control. Available 24% Wanling water 800 times liquid, 20% mite mite emulsion 1000 times or 73% Kefite emulsion 2000 times liquid and other pesticides. At the same time, we should pay attention to the selection of counterpart pesticides used alternately or in conjunction with the use, so as to avoid the tea mite resistance.

3, because the tea yellow mite has tenderness, the drug to the upper part of the plant tender parts as the focus of the leaf to the back of the leaf as the focus of the leaf back leaf surface should be sprayed through. At the same time, the lower leaves should also be sprayed to kill the pest mites in the transfer.

In addition, because of the virus disease and "chicken claw madness" both occur in the vegetable tender new leaves and top (or buds, young fruits), resulting in leaf curl slender, vegetable farmers called it "leaflet disease". Many farmers will be "chicken claw crazy" mistaken for virus disease. In fact, the main symptoms of viral diseases: leaf veins fade green at the beginning of the emergence of mottling, foliage, leaf thickening, narrow deformity, shortening of the internode or plant dwarf, and sometimes brown necrotic streaks on the diseased leaves, resulting in defoliation, deflowering, shoot tips to stop growing or necrosis.

Therefore, vegetables appear "leaflet disease" symptoms, vegetable farmers to distinguish between viral diseases or tea mites, to take corresponding measures to prevent and control.