In the spring season, it is particularly important to prevent fruit scale insects from doing a good job of fruit tree production. The use of lime sulfur mixture to prevent fruit pests such as scale insects is good. Use the following points when using:
1. To be used with the match. It is best to use a good lime sulfur mixture at one time. If it can not be used once, it can be stored in small jars and sealed.
2. Pay attention to sensitive crops. According to the types of fruit trees and different stages of growth and development of reasonable use of lime sulfur. Note that some fruit trees are more sensitive to lime sulfur and can easily produce phytotoxicity, such as peaches, plums and plums. After the fruit is colored, it can easily cause fruit drop and should not be used.
3. Pay attention to weather conditions. In winter, the temperature is low and the plants are in dormant state. The use concentration should be higher. Generally in the growth period of fruit trees, the use of a concentration of 0.3-0.4 Baume degrees is appropriate.
4. A reasonable mix. Lithosulfur mixture is used in combination with other pesticides. If used improperly, it will reduce the efficacy and cause phytotoxicity. Special attention should be paid to the lime sulfur mixture should not be mixed with organic phosphorus pesticides, nor with Bordeaux mixture.
5. Reasonably alternate medication. The long-term use of lime sulfur alone will make the pest resistant. At the same time, we must know that the higher the concentration of use, the faster the resistance of pests and diseases, so it is best to use alternating with other pesticides, so as not to produce resistance to pests and diseases.
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