Due to high temperature and low rainfall, it is the season when red spider mites reproduce fastest. Due to the years of use of traditional pesticides, the control effect is getting worse and worse, which is a headache for farmers. Today, the editor recommends several excellent formulas for controlling red spider mites, which have the advantages of wide range of killing mites, good rapidity, and long lasting effect, which can effectively control the harm and spread of resistant red spider mites.
Harmful characteristics of red spiders
Red spiders have four stages in their life: eggs, young mites, nymphs and adults. Young mites, nymphs and adults can cause harm. They absorb nutrients from the back of the leaves or the surface of the fruit. In the early stage of leaf damage, small green spots appear on the front of the leaves. As the damage worsens, the entire leaf turns gray and the leaves lose their luster. Eventually, the damaged leaves fall off and the plant grows weakly; after the fruit is damaged, the fruit grows slowly or even stops growing, causing the fruit to become smaller, the quality to deteriorate, and the yield to decrease.
Common excellent formulas
(1) Cyetpyrafen: Cyetpyrafen is a new type of acrylonitrile miticide, which can effectively control a variety of pest mites such as two-spotted spider mites, cinnabar spider mites, tea yellow mites, cotton spider mites, apple spider mites, citrus panonychus mites, wolfberry gall mites, etc. It has a good killing effect on eggs, larvae, nymphs, and adult mites. It has good rapid effect, long lasting effect, low toxicity, and is not sensitive to temperature. It is currently the best agent for controlling various resistant pest mites.
In the early stage of the occurrence of larvae and nymphs of pest mites, 30% cyetpyrafen suspension can be used with 5000-6000 times dilution (5-10 ml) to evenly spray the leaves of the whole plant. All pest mites can be killed within 1-3 days, and the lasting effect can reach 30 days.
(2) Abamectin·Etoxazole: This formula is a compound acaricide made from abamectin and etoxazole. It has strong permeability and has a good killing effect on all stages of red spider mites. It has good rapid effect and long lasting effect, especially killing mite eggs thoroughly. In the early stage of red spider mites, 25% abamectin·etoxazole suspension can be sprayed with 10,000-12,000 times dilution for prevention and control. It has a strong killing effect on resistant mites that have already developed, and the lasting effect can reach 70 days. It is also the longest lasting acaricide formula currently.
(3) Bifenazate·Spirodiclofen suspension: This formula is a compound insecticide made from spirodiclofen and bifenazate. It has a very strong permeability and is particularly effective in killing eggs. It also has a good contact killing effect on young mites and nymphs. At the early stage of red spider mites, 2000 times dilution of 40% bifenazate·spirodiclofen suspension can be used to spray evenly on the leaves of the whole plant, and the effective period can reach about 15 days.
(4) Abamectin·pyridaben: This formula is a compound of abamectin and pyridaben, which is an insecticide and acaricide. It mainly acts by contact and stomach poison, has good rapid effect and strong permeability. It can be used to control various mites. At the same time, it can also control cabbage worms, beet armyworms, cotton bollworms, etc. It is an excellent insecticide and acaricide, and is the most classic formula for controlling various mites. At the early stage of mites, 10.5% abamectin·pyridaben emulsifiable concentrate 15-20 grams, diluted with 30-40 kilograms of water, and evenly sprayed on the front and back of the leaves of the whole plant. Generally, it is sprayed once every 7 days, and sprayed 2-3 times in a row to effectively control the damage of mites.
The above formulas have good control effects on all stages of red spider mites. However, since red spider mites are prone to develop drug resistance, in order to delay drug resistance, during the peak period of red spider mites, several formulas should be used alternately as much as possible to achieve more prominent control effects.
