Pest control of paulownia

1. Brown spot disease

Haitong green leaves appear brown spots, these spots are round, oval, and irregular shapes, some large, some small; the color is dark brown, there is light brown; some leaves have a spot, some leaves have several spots of different sizes, this is brown spot. In the later stage, brown spot will produce small black spots in the center of the spot, which is the pathogen.

Prevention and cure method

First of all, the source blocks off the pathogens, buyers pay attention to check the leaves when buying, do not buy seedlings with spots; sellers check their own seedlings at any time, find symptoms, timely treatment or destruction. After purchase, scientific planting, careful care, enhance Haitong's self-immunity, if there are spots of branches and leaves, timely removal, destruction treatment. If it is confirmed that they have the disease, they can also be treated by spraying pesticides on time in accordance with the correct treatment.

two。 Bituminous coal disease

Bituminous coal disease is mainly manifested in the leaves, is some mildew like coal ash, will cover the leaves, so that the leaves can not receive light, so that it can not grow normally, and eventually can only dry up and die.

Prevention and cure method

Because soot mainly affects the light of plants, in order to prevent and cure the disease, it is necessary to make the branches and leaves reasonable, sparse and orderly, so that each leaf can be bathed in the sun; if diseased branches are found, they should be cut off and destroyed in time.

3. Blown cotton scale

Blow cotton scale is a kind of pest that looks like a spider, it seriously affects the healthy growth of Haitong, even occurs many times a year, is a very stubborn, difficult to control a kind of pest.

Prevention and cure method

Like the prevention and control of brown spot, first stop from the source, buyers pay attention to inspection when buying, find pests, refuse to buy; sellers take good care of their seedlings, find pests, and treat them in time. When pests are found after planting, first of all, the branches and leaves with insect pests should be cut off and taken out of the field for destruction. They can also be used to prevent pests and introduce red ladybugs that like to eat cotton scale. Of course, drug control can also be carried out.