Four major types of fungal diseases prevention and treatment, how to choose pesticides to cure the disease?

As long as you look at the disease and understand the medicine, you can correctly choose the right pesticide , reduce the blindness, enhance the science, and get twice the result with half the effort.

Plant diseases can be divided into non-invasive diseases and invasive diseases. Different diseases, different pesticides and control schemes are used, so it is not necessary to spend money.

Non-invasive diseases are caused by unfavorable environmental conditions. There are many reasons for their occurrence. The most important reasons are unsuitable soil and climatic conditions, such as lack of nutrients, water imbalance, high temperature and drought, low temperature and freezing damage. And harmful substances in the environment.

Common non-invasive diseases are: cucumber root, tomato umbilical rot, Chinese cabbage dry heart and so on. Non-invasive diseases do not produce diseases, do not spread each other, and the disease-causing factors disappear after development, no need for chemical control. However, non-invasive diseases often cause the decline and death of plant tissues, and breed some saprophytic fungi and bacteria, which are easily mistaken for infective diseases.

Infectious diseases are caused by pathogenic organisms, mainly including fungi, bacteria, viruses, and nematodes. Among them, fungal diseases are the most important type of plant diseases, and the species and quantity are also the most.

One or four major types of pathogenic fungi

1, low fungi

Most of them grow in water or soil. The main diseases are collapse disease, root rot, downy mildew, white rust, epidemic disease, and cotton blight. Generally, there are more cases in the spring and autumn when the temperature is low (15-20 degrees Celsius).

2, higher fungi

The main diseases are scab, powdery mildew, anthracnose, leaf spot, black spot and so on. Such as: wheat scab; peanut black spot; grape, apple, peach, melon, wheat, beans, sugar beet powder; cotton, beans, melon anthracnose; apple, pear scab; peach Apricot leafy disease; melon seed blight; grape black rot, house blight; apple ring disease, black rot, rot disease, dry rot; onion leaf blight; eggplant brown streak. The disease occurs at a point where the affected part has a more pronounced edge and forms a lesion of a certain shape.

3, the highest fungi

The diseases caused mainly include smut, rust, sheath blight and blight. Such as: black powder disease, black powder disease, grain black powder disease, leaf black powder disease, pear, peach, apple, grape, bean, peanut, onion, sunflower rust, cotton, eggplant blight. Generally only cause local infection, forming a point of symptoms.

4, higher, highest fungal complex type

Most of the types of disease symptoms caused by local necrosis, common symptoms are:

(1) Leaf spot type: such as legume leaf spot, beet, pepper brown spot, cruciferous vegetable black spot, potato, tomato early blight;

(2) types of anthracnose: such as apples, peaches, beans, melons, onions, cruciferous vegetables, Solanaceae, cotton anthracnose;

(3) Types of scabies: such as grape black pox disease and peach sore disease;

(4) Types of ulcer disease: such as apple rot disease;

(5) Types of wilt disease: such as cotton, blight, and melon wilt;

(6) Types of rot disease: such as peach brown rot, eggplant brown streak and so on.

Second, how to choose the right pesticide

First of all, we must have an understanding of pesticides for controlling fungal diseases. Many drugs for controlling fungal diseases: such as commonly used chlorothalonil, cream, manganese zinc, nail cream, manganese zinc, difenoconazole, triadimefon, diniconazole, carbendazim, thiophanate-methyl, Mancozeb, myclobutanil, tebuconazole, flusilazole, ethylphosphonium bromide, procymidone, amishida and the like.

Among them, the prevention and treatment of low-grade fungal diseases include: creams, manganese zinc, nail cream, manganese zinc and ethyl phosphine aluminum; and the prevention and treatment of higher fungal diseases include: difenoconazole, triadimefon, myclobutanil, tebuconazole , flusilazole, diniconazole, carbendazim, thiophanate-methyl, procymidone, and the like.

For high-grade fungi and low-grade fungal diseases: chlorothalonil, amishida and manganese-zinc, of which chlorothalonil and mancozeb are protective agents. Amishida is the most broad-spectrum systemic fungicide with killing activity against lower and higher fungi. Knowing the disease and the agent, you can choose the corresponding fungicide according to the pathogenic fungus, such as downy mildew, late blight, plague, squatting disease, etc. It is a low-grade fungal disease, you can choose the cream, manganese zinc or nail Frost·manganese-zinc; for high-grade fungal diseases such as leaf spot, leaf blight, anthracnose, powdery mildew, smut, black scab, early blight, and scab, difenoconazole and triazole can be used. Ketone, carbendazim, thiophanate-methyl, myclobutanil and the like.

In short, as long as you look at the disease and understand the medicine, you can correctly choose the right pesticide, reduce the blindness, enhance the science, and get twice the result with half the effort.

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