Agricultural production knows how to use pesticides correctly

Agricultural production knows how to use pesticides correctly

Not all pesticides can be used on various crops. Some pesticides are not used properly, and not only have no effect, but will cause phytotoxicity to crops, resulting in loss of production. So which pesticides are sprayed on different crops will cause phytotoxicity? Today we will share with you:

Bactericide, acaricide, herbicide

Mancozeb (non-complexed mancozeb): not suitable for young fruit stage of edamame, litchi, grape, tobacco, cucurbit crop, certain pear tree varieties, and use of mancozeb Zinc is prone to fruit spots. When the concentration is too high, phytotoxicity is easily caused on the jujube tree.

Propiconazole: It is easy to reduce the seedling rate during seedling stage, the seedlings are rigid, inhibit growth, burn young fruit, try to use it in the middle and late crops; sensitive to melons, grapes, strawberries, tobacco and other crops, please strictly control the dosage. Use after fruit setting.

Pentachloronitrobenzene: Excessive use, pentachloronitrobenzene is susceptible to phytotoxicity when in contact with the shoots of crops.

Chlorothalonil: High concentration produces phytotoxicity to pear, persimmon, peach and plum. Apples cannot be used within 20 days after falling flowers.

Malignant: can not be mixed with strong acid agents, 100 times liquid may have slight phytotoxicity to wheat, should pay attention to when using.

Chunremycin: It has slight phytotoxicity to soybeans and alfalfa, and should be used when it is used in neighboring soybeans and alfalfa.

Sulfur: Cucumbers, beans, potatoes, peaches, plums, pears, grapes and other crops are sensitive to the drug and are prone to phytotoxicity. When using, it should be adapted to reduce the concentration or reduce the number of application. In the hot season, it should be applied early and late to avoid the application at noon.

Oil emulsion: germination and flowering spray oil emulsion 150 times 40% sulphate 1200-1500 times, causing phytotoxicity, 10-15 days after spraying oil emulsion, sulphur sulphur mixture, Bordeaux mixture; sprayed pineine mixture Do not use organophosphorus pesticides within 1 week, and do not spray stone sulfur mixture within 20 days.

Spring Thunder Oxygen Chloride (Garden): The young leaves of crops such as apples, grapes, soybeans and alfalfa are sensitive to the drug, and there will be slight curling and brown spots. Pay attention to the concentration when using. It is recommended to spray after 4 pm. I.

Bordeaux mixture: Cabbage, peach, plum and nai are sensitive to the growth period, no matter which formula is easy to produce phytotoxicity; can be used on apples, pears and grapes. Control citrus scab in spring, the temperature exceeds 30 °C, the bud length exceeds "1cm", and the spray of 0.8% is equivalent to Bordeaux mixture will produce severe burning buds. It should be changed to 0.5% of the volume of Bohr safe; pear to copper Ion sensitive, the use of multi-type Bordeaux mixture; grapes sensitive to lime, the application of lime semi-quantity Bordeaux liquid, such as high temperature period around noon in summer, rainy days, morning fog and dry air and sprays are easy to cause phytotoxicity.

Stone sulphur mixture: It is easy to cause phytotoxicity to young tissues of grape, peach, pear, plum, plum, apricot and other fruit trees. It should be used carefully, so it should be sprayed in the deciduous season. Do not use it during the growing season or flowering period. It has certain phytotoxicity to kiwi, grape, cucumber and legume flowers.

2,4 drops of butyl ester: cotton, beans, vegetables, rapeseed and other dicotyledonous plants, large, wheat, rice seedlings should not be used before and after jointing.

Amitraz: The short-fruited golden-crowned apple is sensitive to the drug and has burnt leaf phytotoxicity.

Acetylene: Crop seedlings and young shoots are sensitive to the drug under high temperature and high humidity conditions, and are prone to phytotoxicity. In order to ensure crop safety, the dilution ratio of 73% emulsifiable concentrate should not be less than 3000 times for melon beans and cotton seedlings below 25 cm, and should not be less than 2000 times for young shoots of citrus.

Triazole tin: It is preferred to use a concentration of 1500-2000 times. In the low temperature period, the concentration of the spring shoots will have a lighter phytotoxicity, and it will also cause falling flowers, defoliation, fruit drop, etc., and the use of 10-15 cm of new shoots of orange may cause phytotoxicity.

Insecticide

Malathion: Some varieties of tomato seedlings, melons, cowpeas, sorghum, cherries, pears and apples are sensitive to this drug, and attention should be paid to the concentration.

Dimethoate, omethoate: hops, compositae, some varieties of sorghum, tobacco, jujube, peach, apricot, plum, fig, citrus and other crops are sensitive to dimethoate diluted below 1500 times, peanuts use Too many times, the leaves will not close at night, and the concentration should be used before use.

Killing thiophene: cabbage, radish, broccoli, cabbage, green vegetables, cauliflower and other cruciferous vegetables and sorghum are sensitive to this, pay attention when using.

Phoxim: Cucumber, green beans, watermelon are sensitive to the drug, 50% emulsifiable concentrate 500 times spray has phytotoxicity, 1000 times liquid may also have slight phytotoxicity; beet is also sensitive to phoxim, such as mixed stuffing When appropriate, the dosage and suffocation time should be appropriately reduced. Sorghum is not suitable for spraying; corn can only be used to control corn mash with granules; it is sensitive to leafy vegetables at high temperature.

Triazophos: Sugarcane, white peony, corn and other crops are prone to phytotoxicity.

Chlorpyrifos: Chlorpyrifos is very sensitive to tobacco and lettuce and should be banned. It should be used for melon seedlings after 1 meter long. In addition, some cherry varieties are also sensitive to it.

Killing phosphorus: should avoid spraying in the flowering period, so as not to cause phytotoxicity, the use time should be before flowering, the concentration should not be increased arbitrarily, otherwise it will cause brown leaf spots. In June-July, the temperature is more than 30 °C and 800-1000 times, the young fruit is easy to produce phytotoxicity.

Profenofos: When the concentration is high, it has certain phytotoxicity to cotton and melon beans, and has phytotoxicity to cockroaches and sorghum; for cruciferous vegetables and walnuts, avoid use during flowering of crops.

Trichlorfon (dichlorvos): sorghum and beans are particularly sensitive and should not be used; melon seedlings, corn, apples (dawn, marshal, etc.) are also susceptible to phytotoxicity in the early days.

Zhong Dingwei: 10 days before and after the application of rice fields, avoid using enemy cockroaches to avoid phytotoxicity.

Killing 螟: When rice is flowering or when the crop is wet by rain, it is not suitable for application; the seedlings of cruciferous vegetables are sensitive to the drug, and it is not suitable for application when the temperature is high in summer.

Dibutyl ether urea: It is easy to produce phytotoxicity to seedlings under high temperature and high humidity conditions. Under normal conditions, the dosage of 25% dibutyl ether urea EC is not more than 50ml/mu.

Isoprocarb: The potato crop is sensitive to the drug and should not be used. Do not use the enemy for 10 days before and after the application.

Carbofuran (furandan): This medicine should not be used in rice fields, and should not be used together with herbicides such as chlorpyrifos and chlorpyrifos to prevent phytotoxicity (application of cockroaches should be carried out 3-4 days before application of carbofuran, or Apply 1 month after administration of the drug).

Buprofezin: Drugs such as contact with cabbage, radish and other crops on the leaves will appear brown spots or whitening and other phytotoxicity.

Insecticidal double: Cruciferous vegetable seedlings such as beans, cabbage, and cabbage are sensitive to insecticidal double reaction at high temperatures in summer, and are prone to phytotoxicity and should not be used.

Flurazine: The leaf of the cruciferous vegetables such as Chinese cabbage is easily burned at a seedling stage, and the concentration is not less than 1500 times. The dicofol apples are sensitive to red jade and asahi, and are susceptible to phytotoxicity.

(Original title: List of pesticides and phytotoxics, you must look at agriculture! (Complete in history))