Eggplant cinnabar leaf mites will nibble on eggplant leaves, resulting in inability of eggplant leaves to grow normally, which seriously affects the yield and quality of eggplant.
Eggplant cinnabar leaf mite symptoms:
In fact, the cotton leaf mite is a composite population containing more than 3 species of cinnabar leaf mite and two-spotted leaf mite, mainly for eggplant, corn, sorghum, millet, sunflower, mulberry, grass, beans, cotton, dates, citrus, cucumbers and so on.
Eggplant cinnabar leaf mite pathogens:
Juvenile mites and early nymphs are inactive. In the later stage, if you conceal it, you are lively and gluttonous, and you have the habit of climbing upwards. First it harms the lower leaves, and then spreads upwards. When there is too much to reproduce, it is often grouped in groups at the end of the leaves, rolling to the ground, blown away by the wind, and crawling and spreading around. The starting temperature of cinnabar leaf snail development is 7.7-8.8 °C, the optimal temperature is 25-30 °C, and the optimal relative humidity is 35%-55%, so the high temperature and low humidity of June to July are heavy, especially in dry years. However, when the temperature reaches more than 30 °C and the relative humidity exceeds 70%, it is not conducive to its reproduction, and the rainstorm has an inhibitory effect. There are more than 30 species of predators.
Transmission routes and pathogenesis conditions of eggplant cinnabar leaf mites:
The state and place of wintering insects vary from region to region, with female adult mites overwintering in weeds, dead leaves and soil cracks in North China, overwintering in weeds and bark cracks in various insect states in Central China, and overwintering in weeds or crops such as peas and broad beans in Sichuan with female adult mites. The next spring, when the temperature reaches above 10 °C, the mass breeding begins.
Eggplant cinnabar leaf mite control method:
(1) Agricultural control. Eradicate fieldside weeds and remove dead leaves.
(2) There are more than 30 kinds of natural enemies in this mite, and attention should be paid to protection and the natural control of natural enemies should be brought into play.
(3) Pharmaceutical prevention and control. At present, the bionic pesticide 1.8% Nongke mite emulsion 2000 times liquid with special effects on cinnabar leaf mite and dimaceous leaf mite is excellent, with a long effective period and no drug harm. In addition, 20% exciter emulsion 2000 times liquid, 20% snail emulsion 2000 times liquid, 40% water amine thiophos emulsion 2500 times liquid, 20% dimethocarcin emulsion 1000-1500 times liquid, 10% Uranus emulsion 6000-8000 times liquid, 10% imidacloprid wettable powder 1500 times liquid, 1.8% efodine (BA-1) emulsion antibiotic insecticide 5000 times liquid, 15% pyridoxine (broom net, altair) emulsion 2500 times liquid, 20% compound Liuyangmycin emulsion 1000-1500 times liquid, prevention and treatment 2-3 times.