Tea yellow mite is an insect in the genus Arachnoid mites in the family Tarsal mites. It is one of the most harmful mites that harm vegetables, with a very mixed diet and a wide range of host plants, with more than 70 known hosts. It is mainly harmful to cucumbers, eggplants, peppers, potatoes, tomatoes, melons, beans, celery, fungus, radish and other vegetables. Mainly distributed in Beijing, Jiangsu, Zhejiang, Hubei, Sichuan, Guizhou, Taiwan and other places. In recent years, the harm to vegetables has become increasingly serious.
< h1 class= "pgc-h-arrow-right" > life habits:</h1>
In the south, 20 to 30 generations occur a year, and the generations overlap. Adult mites overwinter in soil crevices, vegetables and weeds at the rhizosphere. Breeding hazards occur from March to April, mild hazards from April to May, and occur in large numbers from June to early October, and decrease significantly after October. Mites spread by crawling, wind and people, tools and seedlings. From the end of May to July, the harm is serious. Adult mites are more active, and there is a tender habit of migrating female mites to the young parts of the plant by male adult mites, and generally suck on the back of young leaves. The eggs are mostly laid on the back of young leaves, in fruit depressions and on young shoots.
<h1 class="pgc-h-arrow-right" > hazard symptoms:</h1>
Adult mites and juvenile mites are mostly concentrated in the young part of the crop sucking hazard, when harming cucumbers, mainly harm the new leaves and young leaves of cucumbers, the back of the affected leaves is gray-brown or yellow-brown, with oily luster, making the leaves smaller, thicker and stiffer, the leaf margins curved to the back, wrinkled, hard and brittle. Due to the extremely small size of the mite, it is difficult for the naked eye to observe and identify, and the above features are often mistaken for physiological diseases or viral diseases.
<h1 class = "pgc-h-arrow-right" > control method:</h1>
1. Eliminate the source of overwintering insects - eradicate weeds from the field and remove the dead leaves of the remaining plants
2. Cultivate insect-free seedlings.
3. Try to eliminate the tea mites in the protected areas and clean the countryside to reduce the harm on the open vegetables in the following year.
4. Spray to kill mites before colonization, and alternatively, early maturing varieties can be selected, early planting and early harvesting, to avoid the peak of pest mites
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