How to properly use greenhouse vegetable pesticides

Shed vegetables often cause pests and diseases due to excessive humidity, and the commonly used spray application method also increases the humidity in the shed while applying the control. Therefore, the prevention and control of greenhouse vegetable pests and diseases should promote the application of powder spraying. Therefore, the use of powder spraying method to control greenhouse vegetable diseases has the advantages of saving labor and medicine, not increasing the humidity in the shed, and significantly improving the repellent effect. However, the application of powder spraying should pay attention to the following "two choices and two notes":

One or two choices

1. Choose a suitable dusting agent

Control cucumber downy mildew, tomato late blight, use 10% anti-mildew or 5% chlorothalonil dust; control cucumber anthracnose, black heart disease, use 5% chlorothalonil or 12% of charcoal dust For the prevention and treatment of bacterial bacterial angular spot disease of cucumber, 10% of D drops dust is used; for controlling vegetable gray mold, leaf mold, early blight and late blight, the beneficial dust is selected.

2, choose the right duster

It is advisable to use a domestic harvesting type 5 or 10 hand-cranked duster. Before the application, the shed was closed, and then the powder was sprayed at 1 kg per acre. The pesticide was placed in the sprayer medicine box, and the amount of powder discharged was adjusted to about 200 grams per minute.

Second, two attention

1, pay attention to spraying time

On sunny days, it is advisable to apply medicine in the morning or evening, and spray it on cloudy and rainy days. Applying the best after closing the shed in the evening. In the sunny morning to afternoon, the sunlight is strong and the dust control effect is low.

2, pay attention to the spraying method

When spraying powder, spray on the vegetables, whether it is uniform or not, the effect is very poor. Only a uniform air-to-air powdering effect is good. If the powder is not evenly distributed, some of the powders will not disperse well and the control effect will be reduced.