Common pesticide species phytotoxicity problem

● Mancozeb (non-complexed mancozeb)

It should not be used for the young fruit stage of edamame, litchi, grape, tobacco, cucurbit crops, and some pear tree varieties. The use of mancozeb is easy to appear on the pear fruit. When the concentration is too high, phytotoxicity is easily caused on the jujube tree.

● Propiconazole

In the seedling stage, the seedling rate is reduced, the seedlings are rigid, the growth is inhibited, the young fruit is burned, and it is used in the middle and late crops. It is sensitive to crops such as melons, grapes, strawberries, tobacco, etc. Please strictly control the dosage and use it 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, so pay attention when using.

● Chunleimycin

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 frequency of application. In the hot season, it should be applied early and late to avoid the application at noon.

● Oil emulsion

In the germination and flowering period, the spray oil emulsion 150 times +40% sulphate 1200~1500 times, causing phytotoxicity. After spraying the oil emulsion for 10~15 days, the sulphur mixture and Bordeaux mixture can be sprayed; after spraying the pine ash mixture for 1 week Do not use organophosphorus pesticides within the product, and do not spray stone sulfur mixture within 20 days.

● Spring thunder oxygen copper

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. It is advisable to spray me after 4 pm.

● Bordeaux mixture

Cabbage, peach, plum and nai are sensitive to it during the growing season. No matter what kind of formula, it is easy to produce phytotoxicity; it can be used on apples, pears and grapes. Control citrus scab in spring, the temperature exceeds 30 °C, the bud length is longer than "1cm", and the spray of 0.8% of the same amount of Bordeaux liquid will produce severe burning buds. It should be changed to 0.5% of the volume of Bohr safe; pear to copper The ion is sensitive, the double-type Bordeaux mixture is used; the grape is sensitive to lime, and the lime half-type Bordeaux mixture is applied. For example, the high temperature period around the noon in summer, the rainy day, the morning fog and the dry air spray are easy to cause phytotoxicity.

● Stone sulfur mixture

For young plants of grape, peach, pear, plum, plum, apricot and other fruit trees, susceptibility to phytotoxicity should be taken. Use it carefully. It is best to spray it 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

For dicotyledonous plants such as cotton, beans, vegetables, and rapeseed, large, wheat, and rice seedlings should not be used before and after jointing.

● Double armor

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

● alkyne

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 the safety of crops, 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 advisable to use a concentration of 1500 to 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 the drug, and attention should be paid to the concentration.

● Dimethoate, Omethoate

Some hops, compositae, some varieties of sorghum, tobacco, jujube, peach, apricot, plum, fig, citrus and other crops are sensitive to dimethoate emulsion diluted below 1500 times, and the number of peanuts used is too high. The leaves are not closed at night, so pay attention to the concentration before use.

● chlorpyrifos

Brassica vegetables such as cabbage, radish, broccoli, kale, green vegetables, and cauliflower are sensitive to cruciferous vegetables and sorghum.

● phoxim

Cucumber, green beans, and watermelon are sensitive to the drug. 50% emulsifiable concentrate is sprayed with 500 times emulsification. 1000 times liquid may also have slight phytotoxicity. Beet is also sensitive to phoxim. Reduce dosage and suffocation time. Sorghum is sensitive and should not be sprayed; corn can only be used to control corn mash with granules; it is sensitive to leafy vegetables at high temperature.

● Triazophos

Crops such as sugar cane, white peony and corn 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

Spray should be avoided during the flowering period to avoid causing phytotoxicity. The use time should be before flowering, and the concentration should not be increased arbitrarily, otherwise brown leaf spots will be caused. In June-July, when the temperature exceeds 30 °C, 800 to 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 using in the flowering period 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

Avoid using cockroaches for 10 days before and after applying rice fields to avoid phytotoxicity.

● Killing Dan

When the flowering period of rice or 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 high temperature grows weakly 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 emulsifiable concentrate does not exceed 50 ml/mu.

● Isoprocarb

Potato crops are sensitive to this 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 conjunction with herbicides such as chlorpyrifos or chlorpyrifos in order to avoid phytotoxicity (application of cockroaches should be carried out 3 to 4 days before application of carbofuran, or 1 month after administration of the drug) Application).

● Buprofezin

If the liquid is exposed to the leaves of cabbage, radish, etc., brown spots or whitening may occur.

● insecticidal double

The cruciferous vegetable seedlings such as beans, cabbage and cabbage are sensitive to insecticidal double reaction at high temperature in summer, and are prone to phytotoxicity and should not be used.

Fluampazine

It is easy to burn leaves of Brassica chinensis and other vegetables in the 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. Pay attention when using.

More pesticide knowledge , please pay attention to China Pesticide Network

We are a professional manufacturer of  Pin Nailers.

Pin Nailers are characterized by:

l Nailing depth can be adjusted quickly strong.

l lightweight, flexible operation.

l Easy-molded rubber handle and ergonomic gun body design operation.

l Easily broken parts are imported from Taiwan.

Pin Nailers Series

Pin Nailers Series,Pin Nailers,Capacity Pin Nailer,Micro Pin Pneumatic Nailer,Pin Headless Nailer,Headless Pin Nailer,Best Micro Pin Nailer

DAHOO Tools Co., Ltd. , http://www.dahootools.com