The scale insects are Homoptera (Hymenoptera) insects, most of which have waxy secretions (ie, shells). Scale insects are the most common pests on flowers and fruit trees. They often cluster on branches, leaves, and fruits to absorb sap damage. In severe cases, they cause wilting of branches or death of whole plants. The secretions of scale insects can also cause coal pollution and cause great harm. There are six kinds of common species, such as squeaking, squeaking, cutting, squeezing, squatting, sauerkraut, mulberry, and whitefly. Beta-cypermethrin can be used to control scale insects. The 4.5% beta-cypermethrin EC in Tianjin Spiro Pesticide Technology Development Co., Ltd. (telephone) is registered for the control of citrus scale insects.
Tip: Scale insects are sensitive to a variety of organic phosphorus, pyrethroid pesticides and buprofezin, imidacloprid, acetamiprid, nitenpyram, thiacloprid (Aketai), abamectin and other drugs. The difficulty in prevention and control lies in the protection of older adult nymphs and adults, and it is difficult for drugs to penetrate this layer to play a contact-killing role. The critical period of drug use is that each generation of newly hatched larvae is sensitive to drugs when it has not formed a good protective layer. In addition, in general, the hatching peaks of generations of scale insect larvae are more obvious, and they are key generations for drug control. The overlapping of generations later is more serious, and the effect of drug control is poor. The use of good contact-type drugs with good effects and long-acting drugs with long-acting, systemic compounding effects are relatively good. In production, chlorpyrifos can be mixed with imidacloprid, nitenpyram, and thiamethoxam, and fenvalerate can be mixed with avermectin and acetamiprid, and isoprocarb can be mixed with buprofezin and used alternately. 3 times. The proper addition of washing powder and silicone additives in the liquid helps to improve the control effect.
It is understood that the new 240g/L spirotetramat suspension from Bayer CropScience (telephone, 13382891921) has a good control effect on scale insects. The drug has strong systemic absorption and can conduct in two directions in the xylem and phloem, but it has poor immediate effect and does not kill adult worms. When there are many adults, it should be mixed with abamectin and chlorpyrifos.
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