Red spider mites, also known as spider mites, are common pests that can undergo 6 to 9 generations in a year. They have a fast development rate, short life cycle, strong adaptability, and multiple transmission methods, posing significant harm to fruit trees. So, what medicine can be used to prevent and control red spider mites in fruit trees? Let's find out.
Why Are Red Spider Mites Difficult to Control?
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Diverse Reproductive Methods: Red spider mites have diverse reproductive methods, including sexual and solitary reproduction, and this mode of reproduction can inherit resistance from the mother.
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Rapid Reproduction: Red spider mites reproduce very quickly. Under conditions of 25°C, a generation of red spider mites can be produced in 7-10 days.
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Small Size: Red spider mites have a small body size and are easily concealed. Their eggs are only 0.1 mm in size, and even adults are only about 0.3-0.4 mm. They mostly hide on the underside of leaves, in the crevices of branches and buds, and in the fallen leaves and weeds on the ground. Farmers often experience uneven spraying or missing spots when spraying pesticides, leading to the phenomenon of rebound a few days after spraying.
Medicines for Preventing and Treating Red Spider Mites in Fruit Trees
1. Oxydemeton-Methyl Combination: Oxydemeton-methyl is a plant-derived acaricide, and garlic oil is a sulfur ether compound. Using them together can enhance their efficacy. It can be sprayed with a mixture of 1000 times concentration of oxydemeton-methyl + 1000 times concentration of garlic oil (1500 times during the budding period) + acequinocyl/cyflumetofen (used alternately). After 7 days, spray once with 1000 times concentration of matrine + 1000 times concentration of garlic oil.
2. Fenpyroximate-Etoxazole Combination: For resistant red spider mites on citrus, apples, pears, etc., during the early stage of red spider mite occurrence, spray uniformly with 6000-8000 times concentration of 45% fenpyroximate-etoxyazole suspension. The effective period can last for 30-50 days.
3. Abamectin + Spiromesifen: During the early stage of red spider mite occurrence in citrus, spray uniformly with 3600-4800 times concentration of 24% abamectin suspension + 2000-3000 times concentration of 2% spiromesifen emulsion. It can effectively control the harm and spread of red spider mites.
4. Avid + Propargite: For use on citrus, apples, pears, peaches, and other fruit trees, during the early stage of red spider mite occurrence, spray with 1500-2000 times concentration of 10% avid + propargite emulsion to quickly control the damage caused by mites.
