Properties of several commonly used fungicides

1. Carbendazim

Also known as Mian Weiling, MBC. CARBENDAZIM . Physical and chemical properties, the original drug is light brown powder, insoluble with water and general solvents, soluble in dilute inorganic acids and organic acids, stable to heat and unstable to acids and bases.

Preparation: 25%. 50% wettable powder, 40% glue suspension.

Control objects and methods: carbendazim is a widespread internal inhalation fungicide with high efficiency and low toxicity, which has protective and therapeutic effects, has toxic activity against most pathogens in ascomycetes and semi-known bacteria, and lasts a long time. It is suitable for preventing and controlling a variety of diseases on crops such as grain, cotton, oil, fruit trees, vegetables, edible fungi and flowers, and can be mixed with a variety of fungicides and insecticides, but not with preparations containing copper.

2. Dyson zinc

Also known as MANCOZEB physical and chemical properties: the original drug is a yellowish powder with low volatility, insoluble in water, insoluble in most organic solvents, soluble in pyridine, strong hygroscopicity, slow decomposition after moisture absorption, easy to decompose in case of light and heat, easy to decompose in alkaline conditions, and accelerated decomposition in case of copper salt.

Preparation: 80% wettable powder.

Control object and usage: broad-spectrum protective fungicide has strong contact effect on bacteria, mainly for foliar spray, which can effectively prevent bacteria from invading the plant, and has no toxic effect on the bacteria that have invaded the plant, and the effective period is about one week. if necessary, repeated application should be carried out every 7 times every 10 days, and the application times should be determined according to the condition.

3. Daisenmeng zinc

Also known as MANCOZEB physical and chemical properties: the original powder is a grayish yellow powder, insoluble in water and most organic solvents, easy to decompose in case of acid and alkali, high temperature exposure to air and moisture, can cause combustion.

Control objects and methods: broad-spectrum protective fungicides are often used as foliar sprays, which are suitable for the first time before the disease, and the application times are determined according to the disease, each time at an interval of 14 days. It has a good control effect on a variety of crop diseases caused by Phytophthora, Cercospora and Chlamydia, and is often mixed with internal inhalation fungicides. It can delay the development of drug resistance.

4. Aluminum triethyl phosphate

Also known as ethyl aluminum, chloramphenicol, ALIETTE physical and chemical properties: White powder, small volatility, soluble in water, 20. The solubility of C in water is 120 g / L, and the strong alkali is easy to decompose in case of strong acid.

Preparation: 40%, 805 wettable powder, 90% soluble powder. 30% glue suspension.

Control object and usage: this product is an internal absorption fungicide with high efficiency and low toxicity. After being absorbed by plant leaves or roots, it can dredge downward or upward, play a protective and therapeutic role. It is suitable for the prevention and control of diseases caused by downy mildew, Phytophthora and uniaxial mildew in fruit trees, vegetables, cash crops, flowers and other crops. The mixed use of aluminum triethylphosphonate with thiram, carbendazim and Dysenmeng zinc can improve the control effect and expand the control scope.

This agent is mainly used for foliar spray, shallow irrigation of soil and soaking.

5. Thiophanate methyl

Also known as methyl topiramate, THIOPHANATEMETHYL. Physical and chemical properties: light yellow crystal, insoluble in water, soluble in organic solvents, stable to acids and bases.

Preparation: 70% soluble powder, 50% colloidal suspension.

Prevention and treatment objects and methods: thiophanate methyl is a high-efficient, low-toxic, broad-spectrum internal absorption fungicide with protective and therapeutic effects. After entering the plant, it is transformed into carbendazim with bactericidal activity for a long time, and can be mixed with a variety of insecticides and fungicides, but not with copper-containing preparations.

6. Chlorothalonil

Also known as CHLORTHALONIL physical and chemical properties: the original drug is a light yellow powder with slightly irritating odor, insoluble in water, slightly soluble with acetone, xylene and other organic solvents, stable to light, acid and alkali.

Preparation: 75% wettable powder, 10% EC

Control object and usage: Chlorothalonil is a broad-spectrum fungicide, mainly protective, has a certain therapeutic effect, and lasts for a long time. It is suitable for the prevention and control of a variety of fungal diseases on fruit trees, vegetables, flowers and other crops. (it clears up when it snows fast)