Control techniques of main insect pests of vegetables in greenhouse

Greenhouse vegetables artificially create an environment suitable for vegetable growth, improve the regulation and control temperature, can change the market season of vegetables, adjust market demand, promote high quality and high yield of vegetables, is one of the effective means to increase farmers' income. But there are also many pests in the greenhouse, so how to control the main pests in the greenhouse? Let's get to know it.

1. Aphids

There are three kinds of aphids in the greenhouse: melon aphid, bean aphid and peach aphid, which can occur 20-30 generations a year and endanger throughout the year. Aphids mainly gather on the back of leaves and tender stems to suck plant sap, making leaves yellowing, curling and even withering. In addition, it will spread virus disease and do great harm.

Prevention and control methods: aphids can be sprayed with Aikas, cypermethrin, aphid spray and other insecticides. Pay attention to the concentration of the insecticides, generally spraying once every 3-5 days, 2-3 times in succession, at the same time, in order to avoid drug resistance, it is necessary to control the number of drug use and alternate use.

2. Whitefly

Whitefly damage is very widespread, the damage is clustered on the back of the leaves, sucking the plant sap with piercing mouthparts, making the leaves fade to yellow, and even the whole plant withered. In addition, whitefly secretes a lot of dense dew, which causes coal fouling disease, affects photosynthesis and reduces yield and quality.

Control methods: you can use chlorpromazine, Wanling, promethazol, aphid spray control, spray once every 5-7 days, even 2-3 times, also pay attention to alternate use, so as not to produce drug resistance.

3. Red spider

Red spiders can produce about 20 generations a year. The occurrence is more serious under high temperature and dry conditions, when the temperature is more than 30 ℃ and the humidity is more than 70%, it is disadvantageous to occur, and the old leaves are more serious when there is too much nitrogen fertilizer. On the back of the leaves, the sucking mouthparts will suck the juice and form a silk mesh, and the damaged leaves will fade green, appear white spots, and gradually die.

Prevention and control methods: remove the lower old leaves in time, take them out of the shed and burn them, control the high temperature and humidity in the shed, and water them in time to restrain the spread of the disease. It can also be controlled with% agricultural acaroid EC, mike EC, isocarbophos emulsion and other medicament, spraying once every 7 murals every 10 days, 2 Mel 3 times in a row.

4. Thrips

Thrips mainly harm melons, eggplant and legumes and other markets, about 15 generations a year, year-round reproduction, generations overlap. It is more active, generally harmful to the back of the leaves or drilling into the petals, constantly absorbing the juice of tender leaves, shoots, flowers and young melons, the leaves are gray-white after being killed, gradually turn yellow and white and dry, and the injured shoots and flowers turn black and fade, harden and shrink, seriously affecting growth.

Prevention and control methods: after the occurrence of harm, you can propagate with Aikas, cypermethrin, Qixingbao, imidacloprid and other agents, and you can also add the same amount of synergists, such as anti-antibiotic solution, Shengliping, money-saving Ling, etc., spray once every 3 times every 5 days. 2 Mel 3 times.

The above is the introduction of the main pest control techniques of vegetables in the greenhouse. I hope it can help you. If you want to know more about it, please follow us.