What are the symptoms of pesticide damage in rice? A detailed explanation of the latest prevention and control methods

In the process of rice cultivation, the use of pesticides is indispensable, but if pesticides are used improperly, pesticide damage will occur, causing poor growth of rice, and in severe cases, it can lead to rice death and total crop failure, causing huge losses to farmers. So what symptoms does rice pesticide damage have? How should it be prevented and controlled? Let's take a look together.

1. Symptoms of pesticide damage

Rice pesticide damage is divided into acute and chronic. Acute cases generally show symptoms such as spots, scorch, wilting, and deformity 2 days after spraying; while chronic cases develop more slowly, generally showing slow growth, reduced tillering, and delayed fruiting, leading to decreased yield. Among these symptoms, wilting symptoms are mainly caused by herbicides; growth deformities mostly occur in the stems, leaves, and roots of rice, with common ones including leaf curling, clustering, and root swelling; common spots include brown spots, yellow spots, etc.; growth stagnation refers to the inhibition of normal growth of rice, resulting in slow growth.

2. Causes of pesticide damage

First, improper mixing of pesticides leads to excessively high pesticide concentration, and pesticide damage is very likely to occur during high-temperature periods; second, pesticides are not sprayed according to regulations, which is relatively common; third, misuse of pesticides causes pesticide damage. For example, some farmers use herbicides as insecticides, and the next day after spraying, green wilt appears, causing the stem base to turn brown and die; fourth, contamination. After using pesticides, many people do not handle the residual chemicals according to regulations, but discard them at will, and with rainwater washing, they flow into seedling fields, causing pesticide damage to seedlings; improper operation also causes it. When spraying herbicides, many farmers spray them directly onto rice, causing pesticide damage.

3. Prevention and control methods

⟦NL>When pesticide damage occurs in rice, remedial measures should be taken according to different symptoms. If symptoms such as pesticide spots, scorched withering, or plant yellowing appear, shallow water should be kept in the field, and more fertilizer should be applied to supplement the nutrients needed by rice so that it can return to normal. If a herbicide was mistakenly sprayed, immediately spray clean water and repeatedly change the water to reduce the pesticide spots, then apply a small amount of organic fertilizer to promote recovery to normal. If it is 2,4-D pesticide damage, promptly spray gibberellin or natural brassin to remedy it, which can alleviate the pesticide damage.

The above is an introduction to the symptoms of rice pesticide damage and prevention and control methods. I hope it can help you. If you want to learn more related knowledge, please keep following us.