Reasons and Remedial Measures of Phytochemical Injury in Greenhouses of Vegetables

Reasons and Remedial Measures of Phytochemical Injury in Greenhouses of Vegetables

1: Causes of phytotoxicity in vegetable greenhouses

The concentration of the pesticide is too high, or the concentration is correct and the application is repeated during the operation; the pesticide is applied when the temperature is high, the humidity is high, and the sunshine is strong; the pesticide is applied at the sensitive growth stage of the vegetable; and the pesticide is not mixed properly.

Two: Remedial measures when phytotoxicity occurs in vegetable greenhouses

When typical symptoms such as yellowing of leaves, spots on stems and leaves, stagnation of growth, wilting of plants, and deformities appear, it is necessary to analyze the cause of the phytotoxicity in order to take corresponding remedial measures. Commonly used remedial measures for phytotoxicity are:

(1) Spray a large amount of water to wash: If the phytotoxicity occurs after spraying certain pesticides on the leaves and plants, and it is found that the foliage of the injured crops can be quickly sprayed with a large amount of water, and the water can be sprayed repeatedly 2-3 times , Try to wash off the medicine on the surface of the plant.

(2) Topdressing quick-acting fertilizer: On the crops that have suffered from phytotoxicity, quickly topdress fertilizers to increase nutrients, strengthen the growth vitality of crops, promote early growth and accelerate the recovery of vegetables, and the effect on seedlings with less damage is more obvious .

(3) Spraying drugs for mitigating phytotoxicity: When phytotoxicity occurs to vegetables, medicaments for mitigating phytotoxicity can be sprayed on the damaged vegetables to alleviate phytotoxicity.

(4) When phytotoxicity occurs to vegetables, remove the parts with severe phytotoxicity, such as removing the leaves, or removing the top, and use the side branches to regenerate branches for production.

(5) At the same time, it is necessary to pay attention to the thorough cleaning of the medical equipment before it can be used to apply other pesticides.

Attention should be paid to avoiding the use of pesticides that will cause residual damage to the next crops.