As fruit growers use pesticides improperly to cause fruit damage to fruit trees, the following remedial measures should be actively taken to reduce the degree of injury to fruit trees according to the specific causes and extent of damage.
Once the water spray has found that fruit trees are at risk, sprinkle the water immediately to flush the affected plants to dilute and wash off the pesticides that adhere to the foliage and branches, and reduce the pesticide content in the tree body. The more timely and effective the measures are.
When the pesticide is sprayed and the leaves are whitened, for example, the pesticide can be sprayed with 50% granular sodium humic acid and 3,000 times of the foliar spray. Or use the same method to mix the 50% sodium humic acid into the 5000 times liquid for irrigation. The leaves will gradually turn green after 3 to 5 days. If borates are produced from the copper sulfate ions in the Bordeaux mixture, 0.5% to 1% of the lime aqueous solution can be sprayed to eliminate the phytotoxicity. For example, due to phytotoxicity caused by lime sulfur, and on the basis of water washing, 400 to 500 times of rice vinegar solution may be sprayed to reduce phytotoxicity; if pesticides are misused or excessively used, pesticides such as organophosphorus, pyrethroids, and aminomethyl esters cause pesticides. Harmful, can spray 0.5% ~ 1% of lime water, detergent powder, soapy water, wash clean water, etc., in particular, spraying ammonium bicarbonate alkaline fertilizer solution is better, not only detoxification, but also can play outside the promotion of fertilizer The effect of growth and development.
When the topdressing fruit trees are damaged by phytotoxicity, the growth is hindered and the growth is weakened. The fertilizer (nitrogen, phosphorus, potassium, etc., or thin human waste) must be applied in time to promote the recovery of the affected fruit trees as soon as possible. If the phytotoxicity is caused by acidic pesticides, some grass ash and quicklime can be applied. If the phytotoxicity is serious, 1% bleaching liquid can be used for foliar spraying. For alkaline pesticides caused by phytotoxicity, can be followed by ammonium sulfate and other acidic fertilizers. No matter what kind of pesticide, spray 0.3% urea solution + 0.2% potassium dihydrogen phosphate mixture or spray with 1000 times plant power 2003, spray once every 15~17 days, even spray 2~3 Times can reduce injury.
Injecting fresh water to prevent and treat dry insect pests such as cypress, giardinus, and moth, etc. When the drug concentration is too high and causes phytotoxicity, immediately inject a large amount of fresh water at the worm hole of the trunk and make it flow outwards. Dilution of pesticides, such as acid pesticides, can add appropriate amount of quick lime in the injected water, which can accelerate the decomposition of pesticides.
After cultivating the arable crops, timely cultivating loose soil (depth of 10~15 cm) on the garden and artificially raising the roots, adding phosphorus and potassium fertilizers to improve the permeability of the soil and promoting the development of the root system. Enhance the fruit tree's own ability to recover.
After proper pruning of fruit trees has been harmed by phytotoxicity, pruning should be carried out in an appropriate amount in time, the dead branches should be cut off, the dead leaves should be removed, and the dead parts should be prevented from spreading or being infected by pathogens to cause diseases.
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