Symptoms and remedial measures of drug damage to fruit trees

Fruit is a common food in our daily life and one of the sources of supplementary nutrients. however, in the process of planting fruit trees, it is inevitable that diseases and insect pests will occur, and many fruit farmers will use pesticides to control them. Improper use of pesticides will inevitably lead to drug damage. Next, let's take a look at the remedial measures after drug damage to fruit trees with the editor.

1. Symptoms of drug damage

The symptoms of drug damage are different in different parts of fruit trees. when drug damage occurs in the bud, it can not germinate normally, and when the bud is serious, the bud becomes black and dies; after 1-2 days of drug damage, round or irregular erythema will appear on the leaf surface, leaf tip and leaf edge will turn brown and dry, and in serious cases, the whole leaf will be bitter and fall off. After 5-7 days, the leaf surface will appear yellowing symptoms, and in severe cases, the whole leaf will change and fall off. After 3-5 days of drug damage, red or brown spots will appear in the fruit, and large spots will be formed with the development of the fruit. 5-7 days after the injury, a large number of young fruits will fall off, the whole plant will fall off seriously, and the drug damage will occur from July to August. The fruit will appear rust-colored spots or form flower-faced fruit, which will seriously affect the quality of the fruit. After the occurrence of drug damage to the branches, the phloem of the trunk turns brown, and in severe cases, it will extend to the rest of the branches. after 5-7 days, the leaves of the whole plant turn yellow, fall off or scorch, and some of the damaged branches will die, and some of the damaged branches will recover and grow new leaves.

2. Causes of drug damage

The main causes of drug damage in fruit trees are related to the quality of pesticides, methods of use, fruit tree varieties, climate and other factors, the quality of pesticides is poor, such as expired, it is very likely to cause drug damage; excessive use of pesticides, including excessive concentration, repeated spraying, these are very easy to cause drug damage. Improper use of pesticides, for example, chemical reactions occur after mixing two or more pesticides, so that the efficacy is greatly reduced, and it is also possible to cause drug damage; the environment is also one of the important causes of drug damage, such as after spraying, the solution is not dry in the rain or the temperature is too high, which may cause drug damage to fruit trees.

3. Remedial measures

Fruit trees were found earlier when drug damage occurred, so the plants should be washed with water in time to dilute the pesticides in leaves and branches and reduce the content of pesticides in the trees. the earlier the discovery, the better the effect. If it is caused by soil application, irrigation and drainage measures can be taken, first of all, the orchard into the size of flooding, washing off the ground pesticide residues, and then timely drainage. It can also be sprayed to neutralize drug damage, and the drug damage caused by each agent can be neutralized by spraying corresponding drugs, such as Bordeaux solution, low concentration limewater can be sprayed to eliminate drug toxicity, and stone-sulfur mixture can be sprayed to reduce drug damage after cleaning. After the fruit trees have suffered drug damage, they should be fertilized in time to restore the tree potential. If the drug damage is caused by acidic agents, plant ash or quicklime can be applied, while for the drug damage caused by alkalinity, ammonium sulfate can be applied, regardless of the drug damage caused by that kind of medicament. 0.3% urea solution and 0.2% potassium dihydrogen phosphate mixture can be sprayed to reduce the drug damage.

The above is the introduction of fruit tree drug damage symptoms and remedial measures, hope to help you, want to know more related knowledge, please follow us.