The latest course on the control techniques and methods of main insect pests of vegetables in greenhouse

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

1. Aphids

There are three kinds of aphids in greenhouse: melon aphid, bean aphid and peach aphid, which can occur 20-30 generations every year and harm all year round. Aphids mainly gather on the back of leaves and tender stems to suck plant juice by piercing and sucking mouthparts, making leaves yellow, curly and even dead. In addition, they can spread virus diseases, which is extremely harmful.

Control methods: aphids can be used for control by spraying with agents such as Aikashi, cypermethrin, aphid mist, etc., pay attention to the concentration of the agent, generally spray once every 3-5 days, spray 2-3 times continuously, and at the same time, in order to avoid drug resistance, control the number of times the agent is used and use alternately.

2. Whitefly

Whitefly damage as a very wide range, when the damage cluster in the back of the leaves, with piercing sucking mouthparts to absorb plant juice, so that the leaves fade green and yellow, or even the whole plant dead. In addition, whitefly also secretes a large amount of dense dew, causing coal pollution, affecting photosynthesis, reducing yield and quality.

Control methods: available buprofezin, Wanling, Miesaoli, aphidin spray control, every 5-7 days spray 1 time, continuous spray 2-3 times, the same attention should be paid to alternate use, so as not to produce drug resistance.

3. Red Spider

Red spiders can produce about 20 generations a year. It occurs more seriously under high temperature and dry conditions, when the temperature exceeds 30℃, humidity is more than 70%, it occurs more seriously when the nitrogen fertilizer is more. It sucks sap from the back of the leaf with piercing mouthparts and forms a web. The affected leaves will fade green, appear white spots, and gradually die.

Control methods: timely remove the old leaves at the lower part, and take them out of the shed to burn, at the same time control the high temperature and high humidity in the shed, timely watering, inhibit the spread of diseases. Can also be used % agricultural mite emulsifiable concentrate, mite emulsifiable concentrate, water amine phosphorus emulsion and other chemicals control, every 7-10 days spray 1, continuous spray 2-3 times.

4. Thrips

Thrips mainly harm melon, eggplant and leguminous markets. They occur about 15 generations a year, reproduce all year round, and their generations overlap. It is more active, generally on the back of the leaves or drill into the petals harm, constantly absorb the juice of tender leaves, tender shoots, flowers and young melons, the leaves were gray after being killed, gradually turn yellow and white dry, the young shoots and flowers become black and fade, harden and shrink, seriously affecting growth.

Control method: after the occurrence of harm, can be Aikashi, cypermethrin, seven-star package, imidacloprid and other chemicals reproduction, but also can add the same amount of synergist, such as anti-resistance liquid, harm Liping, save money Ling, spray once every 3-5 days, continuous spray 2-3 times.

The above is the greenhouse vegetable main pest control technology introduction, hope to help you, want to know more related knowledge, please pay attention to us.