Methods of exterminating pests in greenhouses

      The greenhouse cultivation is called  a protected field cultivation method for people. Although it can keep warm, moisturize, and build a single microclimate environment, it is still not perfect. For example, large insects can be controlled and many insects can not enter and harm, but there are still many small insects that can enter and harm. The so-called defense is impossible. So what should we do when we grow vegetables in the greenhouse? Let's take a look at the specific elimination method.

      1. Medication requirements

      Do not spray on cloudy or rainy days, or in a humid environment, will reduce the efficacy of the medicine, you can spray after ventilation. Do not use the medicine when the temperature is high, it is easy to cause phytotoxicity, use the medicine alternately, do not use the same medicine for a long time, and do not use the strong toxicity and residual medicine. No fumigant is used. The concentration of pesticides cannot be adjusted arbitrarily, and the medication must follow a safe interval. Use high-efficiency, low-toxic and safe pesticides.

          2. Killing insects

       The most common pests in greenhouses are aphids, leaf miners, noctuids, whiteflies, red spiders, and spiny moths. Common control methods include trapping, , solar insecticidal lamps, urea, and washing powder water solution spraying to kill. Or, the killing effect is good by spraying the extract of Bitter bark vine. Pepper water and garlic water are processed by industrial alcohol spraying to kill insects.

        3. Other methods

      Choose insect-resistant varieties and prevent them in advance. Intercropping with vegetables that can avoid harmful insects, such as garlic and cabbage, has the effect of avoiding insects. Or plant rosemary and other plants around the greenhouse to repel insects. Insects are not adapted to the taste. The effect of using other plants with special flavors is the same. Fertilization should be balanced, with no partial application of nitrogen fertilizers, and increased application of phosphorus and potassium fertilizers.

      4. Clean environment

     It is necessary to keep the room clean. If the diseased plants are severely plucked out and brought out, the nearby soil and vegetables must be disinfected. Remove some dead leaves, diseased leaves, weeds, rotted roots, diseased bodies, and damaged vegetables from time to time, and remove them as soon as possible. The environment is better and there are fewer bugs. Note that the bugs are hidden in the soil, and the soil must be turned over every season to clean up the bugs.

   There are also many insect pests in the greenhouse, and the common ones are those with strong vitality and strong reproduction. The control is mainly to choose high-efficiency and safe pesticides, and use some other self-made pesticides to spray insects. Various methods of exterminating insects.