Red spider is one of the main pests of strawberry. The red spider that injures strawberry in Beijing is mainly the two-spotted spider mite, truncate truncate, and cinnabar. According to the survey, greenhouse spider mites occur more commonly this year and occur earlier than in previous years. The degree of occurrence has increased, and prevention and control work should be done in time. Red spiders were transplanted into the sheds in dead branches, rot leaves, earth seams, or with seedlings in the sheds. The average temperature was above 10°C and the day began. The female quail began to lay Eggs when the daily average temperature reached 16°C. Breathing leaves, the field appears spotted, and then spread to the surrounding plants; on the plant first damage the lower leaves, spread to the upper leaves of the plant, in the back of the leaves drawing nets to hide, hi the back of the main vein near the cluster leaves, spinning in the net Under the influence of the Internet, it can be spread by wind power and personnel activities; generations are harmed alternately, and prevention and control cannot easily spread out in time. Red spiders are important pests in greenhouses and greenhouses; they usually take sap and suck juice, spine, knot, oviposit and damage on strawberry leaves; the affected leaves appear yellow from both sides of the main vein of the petiole. White to gray small spots, leaves become pale gray, yellow leaves lose green, damage is severe when the leaves coke fall off, plant short, slow growth. In the middle and late growth period of greenhouse strawberry, it is vulnerable to the outbreak of spider mites. The damaged plants are dwarfing premature senescence, the leaves are reddish-brown and dry, the flowering period is affected, the fruit is reduced and hardened, and the malformed fruit is increased, which seriously affects the yield and quality of fresh strawberries. Serious damage can reduce production by 30% -40%, or even no income. Therefore, management should take the following measures: Segregation measures are taken: Strictly control personnel entering and leaving the shed, placing sterilizing mats in front of the sheds, changing the overalls into the sheds, and blocking human transmission; operating tools are dedicated to the shed to avoid cross-propagation. Use natural enemies to control: During the early stages of the development of spider mites, use natural enemies to control the number of populations, release predatory mites from flowering to fruit growth, and reduce the number of red spiders before releasing predatory mites, using 1% matrine azadirachtin or 10% abig Bacterin water dispersible granules were used to control pests. After 5-10 days of drug application, predation crickets were released in a ratio of 1:10 to 1:30 in the benefit-to-harm ratio. All of them were able to control leeches well. Use biological pesticides: use 99% mineral oil to dilute 150-200 times with water, spray all over the field, spray it for a second time after 3-5 days, or use 8000-10000 times of avermectin water dispersible granules for spraying. , 7 days control once, the two agents alternately use better. Use of chemical pesticides: Use 8% of avocado EC 1500 times spray, or use 5% thiazolyl cream 1500 times spray, 7 days to prevent and control once, the two agents alternately use better. Vc Enzyme Combo Repair Shampoo
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