Seven tricks to save fruit trees

In summer and autumn, fruit trees are prone to phytotoxicity. The damage of pesticides to fruit trees is divided into acute and chronic. Acute injury is manifested within a few hours to several days after spraying, such as spotting, yellowing, chlorosis, withering, rolling leaves, deciduous fruiting, and shrinking tufts. Chronic drugs will only appear after a long time, such as weakened photosynthesis, flower bud formation and fruit ripening delay, a small, deformed, flavor and color deterioration. Once fruit trees are found to have been sterilized, the following measures should be taken immediately to rescue them.

Rinse most chemical agents in clean water and do not wash with water. If the pesticide concentration is too high, use a sprayer to fill the water. Repeat the washing of the leaves of the fruit tree to flush out the remaining pesticide on the surface of the leaves. The sooner the effect of this measure, the better.

When spraying and neutralizing, for example, the damage caused by pesticides, the granular 50% sodium humate can be sprayed with 3000 times foliar spray; or 50% of sodium humate can be used for irrigating in the same way. The leaves will turn gradually after 3 to 5 days. green. If borates from the copper sulfate ion in Bordeaux mixture, it can be sprayed with 0.5% to 1% lime aqueous solution to eliminate it. As a result of lime sulfur poisoning, based on the washing, and then spraying 400 to 500 times the solution of rice vinegar, can reduce the damage. If misuse or excessive use of organic phosphorus, pyrethroids, amino methyl esters and other pesticides cause harm, can spray 0.5% to 1% of lime water, detergent powder, soapy water, detergent, etc., especially spray Ammonium bicarbonate alkaline fertilizer solution is better, not only has detoxification effect, but also can play the effect of dressing fertilizer outside the root.

When the topdressing fruit trees suffer from phytotoxicity, the growth is hindered and the growth is weakened. Fertilizers (nitrogen, phosphorus, potassium and other fertilizers or thin human waste) must be applied in time to prompt the affected fruit trees to resume growth as soon as possible. If the pesticides are caused by acidic pesticides, some grass ash and quicklime can be applied, and the weight of the pesticides can be sprayed with 1% bleach solution. For the pesticide harm caused by alkaline pesticides, acid fertilizer such as ammonium sulfate can be applied. No matter what kind of harm, spray 0.3% of urea solution plus 0.2% potassium dihydrogen phosphate mixture, spray once every 15 to 17 days, and spray 2 or 3 times, can reduce the injury.

When injecting fresh water to prevent and treat dried aphid pests such as longhorned beetle, gizilidae, and wood-moth moths, due to phytotoxicity caused by high drug concentration, immediately inject a large amount of fresh water into the tree body from the wormhole on the trunk, and Outflow of water to dilute pesticides. If it is an acid pesticide injury, adding appropriate amount of quicklime in the water injection solution can accelerate the decomposition of the pesticide.

After cultivating the arable crops, timely cultivating the soil in the garden to a depth of 10 to 15 cm and artificially growing the roots, adding phosphorus and potassium fertilizers to improve the permeability of the soil, promoting root development, and enhancing fruit trees. Its own recovery ability.

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, and the dead leaves should be removed to prevent the dead parts from spreading or being infected by pathogens to cause diseases.

Suspend the use of similar pesticides to minimize the use of pesticides before the complete release of the hazards, especially to stop using similar pesticides, so as not to increase the harm.

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