In recent years, the widespread occurrence of root diseases of fruit trees, mostly due to improper fertilization or mismanagement, caused great losses to farmers, to take proper remedial action is crucial, Chinese pesticide network Xiaobian give you Weapon:
Generally speaking, the root disease of fruit trees is mainly caused by three reasons: one is pathogen infection, the other is the weakening of fruit trees, and the third is the deterioration of rhizosphere soil environment, and harmful microorganisms occupy a dominant position. Therefore, the treatment of diseased fruit trees must also take measures against these three aspects, and not rely on a single method.
First of all, we must solve the problem of root infection of fruit trees. For the diseased fruit trees, the main root of the disease should be exposed first, and the fungicide should be used for painting. The selected fungicide should be a drug that has a specific effect on soil-borne bacteria, such as "malignant", and pesticides with broad-spectrum bactericidal effects, such as copper preparations and iodine preparations. It should be reminded that the use of "azole" pesticides is not recommended when roots are sterilized. Because these pesticides have a certain inhibitory effect on crop growth, they have adverse side effects on fruit trees that have been poor in growth.
After sterilizing the roots of fruit trees, it is necessary to regulate the growth potential of the debilitating fruit trees and promote their development. Growth regulators that promote the growth of fruit trees, such as "Bai", can also be used for rooting treatments of chitin preparations that have a significant growth promoting effect on the roots of the crops. You can also mix these two. For fruit trees with poor root growth, in order to maintain their overall growth, it is necessary to supplement the fertilizer from the foliage. The potassium nitrate can be applied several times a year to supplement nitrogen or potassium. The concentration of potassium nitrate spray was 0.3%. At the same time, the root should pay attention to the application of calcium fertilizer. Calcium has a significant effect on promoting the growth of fruit tree roots.
The rhizosphere soil environment of the diseased fruit trees is often poor, and harmful microorganisms occupy a dominant position, which is an important cause of the root disease of fruit trees. Therefore, after sterilizing the roots of the fruit trees and rooting the growth regulator, further high-quality microbial agents or microbial organic fertilizers (such as EM or microbial agents containing a large number of spores) should be applied to make the beneficial bacteria occupy the soil. Position, which gives rise to a dominant position and creates a good soil environment for the growth of the roots of fruit trees.
The pesticide network reminds everyone that if these measures are taken in turn, most of the diseased trees will resume normal growth.
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