ã€leaf】
Spots of different colors and shapes appear (small round spots due to drug spray) or scorching and perforation. Leaves lose chlorosis (such as phytotoxicity of Guangmianling to fruit trees and chlorobenzene herbicides to crops. Etc.) Yellow leaves (such as soya bean overdose in soy), leaf char (such as atrazine on the damage of wheat seedlings), leaf deformities (such as duh, pull rope make the heart of the corn twist into a whip, It is often referred to as the tail of a cow's tail. Leaves fall off.
Fruit: Mott fruit (such as brown spots, stains, etc., Bordeaux liquid can produce rust on apples or pears), abnormal fruit, fruit drop, etc.
ã€flower】
It is mainly before flowering or blooming, with falling flowers, premature withering, or sturdy (such as Bordeaux mixture and oil emulsions, etc., which will cause fruit trees to fall during the flowering period).
ã€root】
Cause rot or thick (such as pentachlorophenol sodium on rice root phytotoxicity, 2,4 D herbicide in the jointing stage of rice will make the stem base enlargement); root hair is scarce.
ã€seed】
The main reason is that the germination rate is reduced (such as seed dressing double-mix wheat seeds, the drug amount of more than 0.5% will reduce the germination rate of wheat seeds).
For the harm caused by different reasons, some remedial measures can be taken.
Drainage and irrigation remediation of some pesticides caused by herbicides, appropriate irrigation and drainage can reduce the degree of injury, such as agricultural damage caused by irrigation can be reduced by irrigation and drainage.
Topdressing remedy for the injury of the leaves and the symptoms of plant chlorosis, increase fertilization materials can reduce the degree of injury.
If the water spray leaching is caused by the spraying of foliar and plant pesticides, and if it is found early, spray the foliar of the phytotoxic crop quickly with plenty of water, and repeat 2 or 3 times as much as possible. Plants were washed off the drug and applied phosphorus and potassium fertilizers to promote root development and enhance crop recovery.
Hormonal remedies For the inhibition or interference of gibberellin herbicides, plant growth regulators, such as 2,4 D butyl ester, methamphetamine, ethephon, etc., gibberellin can be sprayed to ease the extent of damage; such as crops The phytotoxicity of pesticides such as Omethoate can be used to spray 0.2% borax on damaged crops.
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