Red Spider Encyclopedia
Red spider, also known as cotton red spider, commonly known as the great spider, the great dragon, sand dragon, etc., the scientific name of the leaf mite, the species in China to the cinnabar leaf mite mainly, belongs to the arachnids, tick mites, leaf mites. Widely distributed, it can harm more than 110 species of plants.
Brief introduction
The red spider is a mite that is extremely reproductive, difficult to exterminate, has a wide range of activities and is highly contagious. It mainly sucks leaf epidermal juice, which is extremely harmful to citrus. Although the peak period of the emergence of red spiders has passed, the prevention and control of red spiders cannot be relaxed.
Observation conclusions and prevention
Red spiders are harmful to citrus
Red spiders are endangering citrus almost all year round, mainly destroying the citrus leaf epidermis, young shoots, fruit epidermis to absorb plant sap, and other pest hazards appear different from the symptoms of other pest hazards, the leaves, peels, chlorophyll that have been sucked by the red spider will be destroyed, and the phenomenon of defeat and whitish will occur. Such white color not only affects the beauty of the fruit, but also affects the yield of the whole tree, and the tree will become weaker and weaker until the tree dies. Therefore, many fruit farmers have listed it as a "brother" of citrus pests and have also entered the list of must-kills.
Why is the red spider so difficult to destroy
The temperature rises, the warm winter phenomenon appears frequently, so that the red spider has obtained a superior growth and reproduction climate, coupled with the unscientific use of herbicides and insecticides, the ecological balance of the orchard is destroyed, and the natural enemies of the red spider are killed, making it more rampant; at the same time, the long-term use of drug prevention and control makes the red spider have drug resistance, and a single drug does not play much role; finally, the reproductive ability of the red spider is very strong, and it can give birth to 30-60 generations a year, and the female can also reproduce without a male. These reasons have also made it difficult for the red spider to be destroyed.
Prevention and control methods for red spiders
Drug prevention and control
Nowadays, the effect of a single drug on the red spider is not very strong, and it is recommended to use a variety of drugs for mixed prevention and control, such as bromo mite ester mixed with pyroster ester, spirant ethyl ester mixed with ethymazole and so on. Drug prevention and control is recommended to be used when red spiders appear in large numbers, after all, red spiders are difficult to eliminate, and no matter how much spraying, it is difficult to extinguish, and can only be suppressed.
Introduction of natural enemy prevention and control
Protect the ecological environment in the park, attract or release red spiders to hunt and kill red spiders, such as predatory mites, Chinese grasshoppers, mite-eating scoops, etc.
Partial method prevention and control
Spraying with cigarette butt soaking water has a certain effect of killing red spiders; the solution of onions after soaking overnight also has the effect of killing red spiders; this is a folk remedy for reference only.
Method to destroy the Red Spider
It is difficult but not impossible to completely eliminate red spiders; red spiders belong to the mites, and most mites will stop breeding below 12 degrees, which is the best time to completely eliminate them, and the success rate of killing with a mite drug will be greatly increased. At the same time, after observation, the red spider likes to dry, and if it often sprays water, it can also play a role in inhibiting reproduction.