Pesticides are an indispensable part of agricultural production. If pesticides are used improperly in agricultural production, they will also cause fatal damage to our crops, causing large-scale production cuts and severe production. The following examples illustrate:

Fluazidin

1. High temperature can not be used, it is very prone to phytotoxicity.

2. The general effect on downy mildew.

3. Can not be combined with emulsifiable oil, because the permeability is very good, and after the emulsified oil, there will be leaf deformity, curling.

4. Sensitive to melons, easy to produce phytotoxicity. Leafy vegetables are also not used as much as possible.

5. The most important point, medication: do not apply drugs in plastic facilities.

Pyrimethanil

Pyrimethanil is very, very sensitive to temperature, and is particularly susceptible to phytotoxicity when it exceeds 25 degrees. Beans and eggplant can be used without being used, especially for spots.

Symptoms of phytotoxicity at high temperatures:

1. After the eggplant is applied, the leaves appear dark brown spots.

2. After the cucumber is used, there is a chlorotic plaque. Severe blade burning, whitening.

3. The beans are dried directly, like a herbicide.

4. There may be yellowing of the leaf margin in the tomato.

5. do not use the cherry, spray once, three years dry.

Metalaxyl

Methotrex 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. The potting effect of this medicine is very good, making full use of the system's systemic and conductive properties. Many agricultural stores use this medicine as a secret recipe to root. However, if a bucket of water is used for more than 25 grams and the rooting is less than 300, it is very prone to yellow head and stop growing. It has not grown or grown slowly for nearly a month, and many people have suffered from it. Be sure to pay attention.

Chlorpyrifos

The quick-acting effect of chlorpyrifos and red spider is unparalleled.

However, if the chlorpyrifos is high temperature, 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, we 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 this year and has been restricted to use.

Zhengzhou Delong Chemical CO., Ltd. is the production base of plant growth regulators in China, which established in 2009, specializing in offering plant protection products. If you have any question, contact us any time.