Analysis of the Causes of Phytotoxicity in Tomatoes and Detailed Explanation of Prevention and Control Measures

During the growth of tomatoes, pesticides are inevitably used, and in the process of using pesticides, phytotoxicity may occur, causing a huge impact on tomato growth. So how should phytotoxicity in tomatoes be addressed? Let's take a look at the detailed introduction below.

1. Symptoms of phytotoxicity

Phytotoxicity can be divided into acute and chronic. Acute phytotoxicity generally shows symptoms within a short time, usually manifested as spots on leaves, loss of green color, and flower and fruit drop. Chronic phytotoxicity generally shows symptoms more than 10 days after spraying, usually manifested as leaf yellowing, deformed fruit, small fruit, inferior fruit, and other symptoms, seriously affecting fruit quality, reducing marketability, and having a huge impact on farmers' income.

2. Causes of phytotoxicity

There are mainly 5 main causes of phytotoxicity. First, the wrong pesticide was used, for example, spraying herbicide when the goal was to kill insects and sterilize. Second, the concentration of the sprayed pesticide was too high or spraying was repeated continuously; excessive concentration of the pesticide can affect the loss of water from leaf cells, causing yellow leaves and loss of green color. Third, spraying under high temperature conditions; the pesticide evaporates and mixes with moisture in the air, then attaches to the leaves, causing phytotoxicity. Fourth, spraying inferior pesticides can also cause phytotoxicity. Fifth, the pesticide is sprayed unevenly, and some areas are sprayed repeatedly.

3. Prevention and control measures

When using pesticides, choose the right pesticide and apply the right remedy for the problem. When spraying, choose the appropriate pesticide for application and master the application amount of the pesticide; do not blindly increase the amount of pesticide used. When mixing pesticides, it must be scientific and reasonable. Long-term use of a single variety of pesticide can easily lead to resistance, so pesticides should be used in rotation. When spraying herbicides, it should not be done at high temperature to avoid evaporation of the pesticide, and at the same time it should not be sprayed on the leaves. After phytotoxicity occurs, spray clean water in time to reduce the pesticide concentration and alleviate the phytotoxicity. At the same time, increase the application of phosphorus and potassium fertilizers to enhance the plant's disease resistance and help it recover as soon as possible. Plant growth regulators can also be sprayed to relieve phytotoxicity.

The above is an introduction to the causes of phytotoxicity in tomatoes and prevention and control measures. We hope it can help you. To learn more related knowledge, please stay tuned to us.