Insecticidal methods of vegetables in greenhouse

People call greenhouse planting as protected cultivation method, although it can keep heat, moisturize and build a separate microclimate environment, it is still not perfect. For example, large insects can be controlled, many insects can not go in to harm, but there are still many smaller pests will enter the harm. As the saying goes, it is impossible to defend. So what to do after growing vegetables and insects in the greenhouse. Let's take a look at the specific methods of elimination.

1. Medication requirements

Do not spray in cloudy and rainy days, do not spray in a humid environment, will reduce the efficacy, can be ventilated after spraying. Do not take medicine at high temperature, prone to drug damage, alternate use of drugs, do not use the same drug for a long time, do not use strong toxicity, residual drugs. Do not use fumigant. The concentration of pesticides can not be adjusted at will, and the medication must follow the safe interval. Use efficient, low toxic and safe pesticides.

2. Killing bugs

The most common pests in the greenhouse are aphids, leaf miners, night moths, whitefly insects, red spiders, spider moths and so on. Common prevention and control methods, trapping, hunting, solar energy insecticidal lamp, urea, washing powder aqueous solution spraying killing. Or the spraying of Celastrus angustifolia extract has a good killing effect. Pepper water plus garlic water processing industrial alcohol spraying insecticidal.

3. Other methods

Choosing insect-resistant varieties, preventing them in advance, and intercropping vegetables that avoid harmful bugs, such as garlic and cabbage, can avoid each other. Or planting plants such as rosemary around the greenhouse can ward off worms, which don't adapt to the taste, and have the same effect with other plants with special flavors. Balanced fertilization, no partial application of nitrogen fertilizer, increased application of phosphorus and potassium fertilizer.

4. Clean the environment

To keep the room clean, the diseased plants are seriously removed and taken out, and the nearby soil and vegetables should be disinfected. Often remove some withered leaves, weeds, rotten roots, diseased bodies, damaged vegetables, and pull them out as soon as possible. The environment is better and there are many fewer bugs. Pay attention to the insects lurking in the soil, you must turn the soil every season to clean up the insects.

There are also a lot of pests in the greenhouse, and the common ones are those with strong vitality and strong fecundity. The main method of prevention and control is to choose efficient and safe pesticides and use some other self-made insecticides to kill insects. There are many ways to kill insects.