1, fluazinam
(1) High temperature can not be used, it is very prone to phytotoxicity.
(2) The general effect on downy mildew.
(3) Do not mix with emulsifiable concentrate, because the permeability is very good, and after the emulsified oil is compounded, leaf deformity and curling will occur.
(4) It is sensitive to melons and is susceptible to phytotoxicity. Leafy vegetables are also not used as much as possible.
(5) The most important point is that the manufacturer's medications have the following words: Do not apply in plastic facilities.
2, pyrimethanil
The substance of pyrimethanil is very very very sensitive to temperature. My feeling is that it is more than 25 degrees, which is particularly apt to cause phytotoxicity. Beans and eggplant can be used without it, no, it is best not to use it. It is especially easy to spot.
Symptoms of phytotoxicity at high temperatures:
(1) After the administration of the eggplant, the leaves showed dark brown spots.
(2) After the cucumber is used, there is a chlorotic plaque. Severe blade burning, whitening.
(3) The beans are directly dried, like a herbicide .
(4) There may be yellowing of the leaf margin in the tomato.
(5) Do not want to use the cherry, spray once, three years dry.
Just a little, this thing has a low temperature, no phytotoxicity, and a high temperature is a madman.
3, procymidone
Procymidone is a common drug for our prevention and treatment of gray mold, and the safety factor is very, very high. However, this product has been tainted.
I used 80% water-dispersed granules for this medicine. I remember the medicinal damage. On the cabbage, the old leaves appeared white spots. After four or five days, the leaves began to yellow, and the growth of cabbage was inhibited. The cabbage in the core period stops the heart, and many people may not believe that there will be phytotoxicity, but it is out, and this year, once again, it is still on the cabbage, still using 80% water-dispersing particles. It is recommended that this medicine be used sparingly on cabbage, especially the vigorous growth of cabbage.
4, metalaxyl
Metalaxyl, do not say this medicine spray, spray this medicine has no effect. Drug resistance is there.
Metalaxe is often used in places where beans and peppers are grown. It is not used for spraying. It is used to root, to prevent root rot and stem-based rot of Phytophthora. This medicine does not look at the spray effect, the rooting effect is very good, making full use of the drug's systemic and conductive properties. Many agricultural stores use this medicine as a secret recipe to root. However, however, if a bucket of water is more than 25 grams and the roots are less than 300, it is very prone to yellow heads, stop growing, and it will not grow or grow slowly for nearly a month. Many people eat here. Loss. Be sure to pay attention and pay attention.
5, chlorpyrifos
Not to mention the effect of this drug on other insects, the quick-acting effect of this drug on Red Spider is unparalleled.
However, however, if the drug is once hot, and the concentration of the drug is too large and it is easy to damage the leaves, it causes yellowing and premature aging of the leaves. The most important thing is that this medicine is very easy to spot on the big dragon long eggplant, like a pockmark. Therefore, you must pay attention to the temperature, the concentration of the drug, and the time of spraying.
Rational use of the drug will produce a god-like effect on the spider. However, this drug has been listed as highly toxic and will not be used. such a pity.
6, Fumei double
Fumeishuang I think that many people are too lazy to use it, but I have to explain that it is very important that if this medicine is used reasonably, it will have a great effect on Sclerotinia. However, with this old medicine, the medicine that is too lazy to use is also harmful. On the tomato, it is easy to appear dry tip and specialize in young leaves. Appear once at a time. But when the sclerotinia disease breaks out, you don't have to, but the tomatoes on our side will top. Will not affect too much.
7, Copper ammonia
When the drug was just emerging, the family said it was safe and very safe. It is true that this drug is safe enough, but this drug has a fatal flaw. It sprays on the eggplant leaves and sprays in the afternoon. On the second day, the leaves appear wilted and gradually return to normal on the third day. However, this problem has caused me to lose a few big customers. The understanding of the peasants is wilting, which will affect the growth and affect the output.
However, the effect of this drug on the bacterial spot effect of eggplant is much better than other copper preparations. I don't understand what this principle is.
8, glyphosate
Glyphosate, a herbicide, is enough for cattle, but it has weaknesses, just like any martial arts kung fu, there are flaws.
The weakness of glyphosate is that low temperature does not die. So at low temperatures, don't sell this product. Farmers think that glyphosate will kill the grass. If it doesn't die, it is a fake drug. Therefore, weeding with this product at low temperatures makes it easy to earn a reputation for selling fake drugs.
9, acetamiprid
The acetamiprid, the common medicine for mites, is very familiar, but this medicine has a defect. I don't know if it is written or not written in the manual. This medicine is sensitive to temperature, high temperature and good insecticidal effect. The temperature is low, and the effect is not lost. It doesn't matter in the shed, you can pay attention to the temperature of the medicine in the open air.
10, mancozeb
The experienced vegetable growers know that if a pesticide containing mancozeb is sprayed on the eggplant, the leaves of the green oil will become dull, and the leaves in the middle and lower parts of the plant will become old and yellow, and some will be yellow. If used continuously for several times, it will cause serious defoliation. The reason is that the pesticide contains a large amount of manganese, and the eggplant is particularly sensitive to manganese. After spraying, the manganese element accumulates in the leaves, so that the manganese is excessive, the light leaves are yellow, and the heavy ones start from the top. . Anyone containing mancozeb has side effects in this area, such as anti-virus cockroach, quick kein, leidomir, ang Mn-Zn, Klu, Dasheng, Dasheng-M45, Xinwansheng, Shandesheng and so on. Therefore, once the yellow leaf phenomenon of eggplant is found, the first consideration is that it is caused by spraying mancozeb, and should be stopped immediately, and then solved with 6000 times of cytokinin mixed with 600 times of cytokinin. The use of fungicides on eggplant should be based on chlorothalonil. Because chlorothalonil is a nitrile fungicide, it is stable in alkali and acid, and has protective and preventive effects on various pathogenic bacteria. It can prevent early blight of eggplant, late blight, gray mold, spot blight, anthracnose. , cotton blight and other diseases. If mixed with DT or nail cream copper or alternately used, it can control a variety of diseases of eggplant, so the mancozeb must not be used on eggplant!
11. Paclobutrazol
Since the half-life after entering the soil is as long as 6-12 months and it is not easy to decompose, it will directly affect the growth of the sorghum vegetables. Taking eggplant as an example, planting in the soil containing paclobutrazol will directly affect the rooting and lowering of the eggplant roots, and the roots are not deep, and the roots are not strong. Under normal circumstances, eggplant colonization is the key period of root development. At this time, the expanded root system will become the backbone of the later root system. However, the application of paclobutrazol inhibited the elongation and expansion of roots. The distribution of roots in the early stage was small, which was unfavorable for the development of roots in the later stage. It was inevitable that the early stage vacancies had a good effect and the plants could not grow up in the later stage. The correct method should be that the effect of foliar application of empty trees is better and the safety is higher, and after the harvest in the season, paclobutrazol is not easy to affect the crops. In addition, even if foliar spray of paclobutrazol occurs, it can be relieved with 25-250 ml / kg of gibberellin solution, and it is difficult to remedy the soil. Therefore, it is best not to apply paclobutrazol!
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(Source: Good Agricultural Resources Network)
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