Symptoms caused by commonly used pesticides

Fungicides, acaricides, herbicides

● mancozeb (non-complexed mancozeb)

It is not suitable for young fruit stage of edamame, litchi, grape, tobacco, cucurbitaceae and some pear varieties. Mancozeb is easy to be used in pear small fruit. When the concentration is too high, it is easy to cause drug damage on jujube trees.

● propiconazole

Use in the seedling stage is easy to reduce the seedling rate, ossify seedlings, inhibit growth, burn young fruit, use in the middle and later stages of crops as far as possible; sensitive to melons, grapes, strawberries, tobacco and other crops, please strictly control the dosage, use after fruit setting.

● pentachloronitrobenzene

Excessive use of pentachloronitrobenzene is easy to cause drug damage when it comes into contact with crop buds.

● chlorothalonil

High concentration is easy to cause drug damage to pear trees, persimmons, peaches and plums. Apples cannot be used for 20 days after falling flowers.

● carbendazim

Can not be mixed with strong acid agents, 100 times liquid may have slight drug damage to wheat, we should pay attention to when using.

● Chunleimycin

It is slightly harmful to soybeans and lotus roots, so attention should be paid to the use of nearby soybeans and lotus roots.

● sulfur

Cucumbers, beans, potatoes, peaches, plums, pears, grapes and other crops are sensitive to the drug and are prone to drug damage. It should be adapted to reduce the concentration or reduce the number of times of application, and should be applied early and late in the high temperature season to avoid noon application.

● engine oil emulsion

Spray machine oil emulsion 150 times + 40% isocarbophos 1200-1500 times in budding and flowering stage, causing drug damage. Stone-sulfur mixture and Bordeaux solution can only be sprayed 10-15 days after spraying engine oil emulsion; organophosphorus pesticides shall not be used within 1 week after spraying pine alkali mixture, and stone-sulfur mixture shall not be sprayed within 20 days.

● Chunlei oxychloride copper

The young leaves of crops such as apples, grapes, soybeans and lotus roots are sensitive to the drug, and there will be slight curls and brown spots. Pay attention to the concentration when using it, and spray me after 4 pm.

● Bordeaux solution

Chinese cabbage, peach, plum and nai are sensitive to it during the growing period, no matter which formula is easy to cause drug damage; it can be used in apples, pears and grapes. To control citrus scab in spring, the temperature is more than 30 ℃ and the bud length is longer than "25px". Spraying 0.8% equal volume Bordeaux solution will produce serious sprouting, so it is safe to spray 0.5% multiple Bordeaux solution. Pears are sensitive to copper ions and use double Bordeaux solution. Grapes are sensitive to lime, so it is easy to cause drug damage by using lime half-dose Bordeaux solution, such as high temperature around noon in summer, cloudy and rainy days, wet fog in the morning and strong wind spraying.

● stone sulfur mixture

It is easy to cause drug damage to the young tissues of grape, peach, pear, plum, apricot and other fruit trees, so it should be used cautiously, preferably in the deciduous season, not in the growing season or in the flowering and fruit season. It has certain drug damage to kiwifruit, grape, cucumber and legume flowers.

● 2, 4 drops of butyl ester

Cotton, legumes, vegetables, rape and other dicotyledonous plants, wheat, rice seedlings before and after jointing should not be used.

● diformamidine

Golden crown apple with short fruit branch is sensitive to this drug and is harmful to leaf burning.

● acetylenite

Crop seedlings and shoots and young leaves are sensitive to the drug under the conditions of high temperature and high humidity, and are prone to drug damage. For crop safety, the dilution ratio of 73% EC should not be less than 3000 times for melons, beans and cotton seedlings less than 25 cm, and not less than 2000 times for citrus shoots and leaves.

● triazolium tin

The suitable concentration is 1500-2000 times liquid. When the concentration is commonly used in the low temperature period, it will not only cause mild drug damage to spring shoots and tender leaves, but also cause falling flowers, leaves and fruits, etc., and it is easy to cause drug damage to orange shoots of 10-15 cm.

Insecticide

● malathion

Some varieties of tomato seedlings, melons, cowpeas, sorghum, cherries, pears and apples are sensitive to the drug, so pay attention to the concentration when using it.

● dimethoate, omethoate

Some varieties of hops, Compositae, sorghum, tobacco, jujube, peach, apricot, plum, fig, citrus and other crops are sensitive to dimethoate emulsion diluted less than 1500 times. Peanuts are used too many times, so the leaves will not close at night. Pay attention to the concentration before use.

● parathion

Cabbage, radish, cauliflower, cabbage, cabbage, cabbage and other cruciferous vegetables and sorghum are sensitive to this, so pay attention to it.

● phoxim

Cucumbers, green beans and watermelons are sensitive to the drug, 50% EC 500x liquid spray is harmful, and 1000 times liquid may also be slightly harmful; sugar beets are also sensitive to phoxim, such as when stuffing seeds, the dosage and time should be appropriately reduced. Sorghum is sensitive and should not be sprayed; corn can only be controlled by granules; it is sensitive to leafy vegetables and easy to burn leaves at high temperature.

● triazophos

Sugarcane, chestnut, corn and other crops are prone to drug damage.

● chlorpyrifos

Chlorpyrifos is very sensitive to tobacco and lettuce and should be prohibited; if it is harmful to melon seedlings, it should be used after the melon vine is 1 meter long. in addition, some cherry varieties are also sensitive to it.

● methophos

Should avoid spraying in the flowering period, so as not to cause drug damage, the use time is appropriate before flowering, and the concentration should not be increased at will, otherwise it will cause brown leaf spots. From June to July, when the temperature is more than 30 ℃ and the temperature is more than 800 to 1000 times, the young fruit is very easy to cause drug damage.

● propiophos

When the concentration is high, it has certain drug damage to cotton and melons, and to alfalfa and sorghum; for cruciferous vegetables and walnuts, avoid using it during the flowering period.

● trichlorfon (dichlorvos)

Sorghum and beans are particularly sensitive and should not be used; melons, corn and apples (dawning, Marshal, etc.) are also easy to cause drug damage to trichlorfon in the early stage.

● Zhong Dingwei

Before and after 10 days of application in rice fields, avoid using paspalum to avoid drug damage.

● Shamindan

It is not suitable to apply pesticide during the flowering stage of rice or when the crops are drenched by rain and dew; the seedlings of cruciferous vegetables are sensitive to the drug and should not be applied when the growth is weak at high temperature in summer.

● butyl ether urea

It is easy to cause drug damage to seedlings under the condition of high temperature and humidity. Under normal conditions, the dosage of 25% butyl ether urea EC shall not exceed 50ml/ mu.

● isoprocarb

Potato crops are sensitive to the drug and should not be used. Do not use paspalum for 10 days before and after application.

● carbofuran (carbofuran)

The application of this drug in rice fields should not be used at the same time with herbicides such as barnyardine and chlorpromazine to avoid drug damage (the application of barnyard should be carried out 3-4 days before the application of carbofuran, or 1 month after the application of the drug).