How to treat poplar diseases?

Poplar is a deciduous tree of the family Populus, whose trunk is tall, majestic and neat, which can prevent wind and sand and absorb waste gas, and is widely used in ecological shelterbelt, three-north shelterbelt, agricultural forest and industrial timber forest. So, how to treat poplar diseases?

First, how to treat poplar diseases?

It depends on what diseases occur in poplar in order to take corresponding control methods. Its diseases include rust, seedling yellowing, black spot, rot, leaf blight, canker and so on.

2. Introduction of poplar diseases

1. Rust

Harm: mainly harm to leaves, but also to petioles, shoots and winter buds. It is the most serious in May and June, and the disease spots of the leaves are connected into pieces, often resulting in scorched leaves and fallen leaves. The incidence was mild in the rainy season and entered the second peak period from August to September.

Prevention and treatment: spray with 25% vermicellin wettable powder 1000mm 15000x, 65% Dysen zinc 500x, dietol sodium 200x; spray 1 ∶ 1 ∶ 125170Bordeaux solution once, and then use 0.3% 0.5 Baomedushi sulphur mixture to control.

2. Etiolation of seedlings

Symptoms: mostly occur in partial alkali land, usually nitrogen deficiency or iron deficiency.

Prevention and treatment: 0.3% ferrous sulfate (black alum) plus 0.5% urea solution, green iron king, tetralin 2000-3000 times spray, spray once every 7-10 days, 2-3 times.

3. Black spot

Harm: the disease is usually transmitted by Rain Water from May to July, and the peak period is from July to August. Under the conditions of high temperature and rain, continuous cropping land, poor seedling growth, low-lying land and high density and humidity of seedlings, the disease occurs seriously, and when the disease is serious, the whole leaf blackens and dies.

Prevention and treatment: spray 1 ∶ 1 ∶ 125: 170 Bordeaux solution every 10 to 15 days, or spray 65% wettable zinc, 250 times thiram, 25% carbendazim 200 times, spray 0.3% glue (or soybean powder, soybean juice, etc.) to increase adhesion and prevent erosion.

4. Rot disease

Harm: it mainly harms all parts of the branches and branches of poplar, and the disease spot is irregular in shape and size. The disease spot expands outward every year, when encircling the branches, the upper branches and stems will all die. In the years with heavy precipitation in spring and summer, the incidence of rot is serious.

Prevention and treatment: scrape off the disease spot with a knife, scrape to the health department, and then apply 10 times the edible alkali water on the disease spot, or 20% agricultural antibiotic 120 water agent 10 times, even apply 2 to 3 times.

5. Leaf blight

Harm: harm to poplar leaves, young shoots and young stems, and the affected leaves were the most susceptible from May to June. Nearly round, polygonal or irregular plaques appear on the damaged leaves, with a diameter of 1 to 5 mm, which can be connected into large spots.

Prevention and treatment: at the beginning of the disease, chemical control is carried out, and the drug is sprayed 2 to 3 times in the whole growing season, which can be controlled by 40% ethyl phosphate aluminum 300x solution, or 75% chlorothalonil 500x solution, or 50% carbendazim 1000 times solution.

6. Ulcer disease

Harm: mainly harms the middle and lower parts of the tree trunk. The disease began in April and reached the first peak from late May to June. The disease slowed down when the temperature increased from July to August, and the second peak appeared in September and stopped after October.

Prevention and treatment: before the peak of the disease, dry it with 100 times of 70% methyl topiramate.