With the onset of the winter season, the busy season of vegetable production and management in solar greenhouses has come. Sunlight greenhouse vegetables are in high temperature and high humidity environment, especially suitable for the occurrence of whitefly, aphids, thrips and other pests, and bring great threat to the yield and quality of vegetables. Below, introduce the common pests and control methods in winter greenhouse vegetable production, for reference. I. Major pest species and hazard characteristics 1. Whitefly. The greenhouse whitefly can occur for 10 generations a year, and enters greenhouses in the winter to harm vegetables. It mainly harms tomato, cucumber, eggplant and other solanaceous vegetables. It absorbs the sap of vegetables from adults and larvae. The leaves of the damaged vegetables turn green, turn yellow and wilt, and finally cause dead. In addition, adults and larvae can also secrete a large amount of honeydew, contaminate the leaves and fruits of vegetables, and cause the occurrence of coal pollution. 2. Locusts. The locusts that endanger greenhouse vegetables mainly include guava pods, soybean pods, and peach pods. It can take 20-30 generations a year. The locust swarms on the back of leaves and tender stems sucking plant juices with sucking mouthparts, making the leaves yellow, curled, deformed, and even dead. In addition, locusts also spread viral disease and are extremely harmful. 3. Hummer. Thrips mainly damage melon crops, eggplants, legumes and other vegetables. The larvae are yellow, and the adults are brownish brown. It takes about 15 generations a year. Thrips absorb the leaves of young leaves, shoots, flowers, and young melons. The leaves of the victim were gray and white, and gradually became yellow and white and dry. The damaged young shoots and flowers turned black and faded and hardened and narrowed, which seriously affected the growth. 4. Red spider. The red spiders that occur in greenhouses in winter are mainly Cinnabaria striata and Tetranychus urticae, which can occur in about 20 generations a year. Severe under high temperature and dry conditions, the temperature exceeds 30 °C, humidity greater than 70% is not conducive to the occurrence of excessive nitrogen fertilizer occurs when the old leaves are heavier. Red spider sucks juice on the back of the leaf with a sucking mouthpart and forms a wire mesh. The victim leaves chlorosis, with white dots and dry leaves. Second, control methods 1. Agricultural control. First of all, after the harvest of the vegetables, the leaves of the broken leaves in the field are promptly removed, and they are collectively destroyed to reduce the number of insect populations. Secondly, in the period of large-scale greenhouse outflow from March to November, 30-mesh insect nets were installed at greenhouse vents to prevent pests from entering the greenhouse. 2. Physical control. Using the phototaxis of pests, swatches can be trapped to kill insect pests in the greenhouse. For example, smearing engine oil on a yellow plate can trap whitefly. The locusts are evasive to silver-gray, and they can hang silver-gray strips around the vents in greenhouses or in the greenhouses to enter the passageways, which can achieve the purpose of repelling locusts. 3. Chemical control. Spraying with 10% imidacloprid can effectively prevent the damage of greenhouse whitefly and aphids. In addition, acetamiprid and other agents can also be used to control whitefly and aphids. The control of thrips can be controlled by spraying 10% of imidacloprid wettable powder 1500 times, and it can also be controlled by high-effective cypermethrin or Aktai. It can be used to control the spider mites with 1.8% Aconazole EC 2000 times or edantin EC 3000 times, spray once every 7-10 days, and spray 2 or 3 times. Portable 3 Ply Disposable Masks Non-woven Face Mask With Elastic Earloops Disposable Surgical Face Mask Dongguan Anmeixuan Electronic Technology Co., Ltd , https://www.hyashine.com