Prevention and control of cucumber anthracnose: what medicine is the best?

Children living in rural areas know that cucumbers are usually planted in March-April every year, and that they need to be taken good care of in the planting process to bear fruit. I remember that when I was a child, my mother liked to grow cucumbers in the garden, in which the prevention and control of diseases was indispensable. For example, if the cucumber leaves had insects, they had to be sprayed with medicine, otherwise it would cause the cucumber seedlings to wither and die. So do you know the prevention and control methods of cucumber anthracnose? Which medicine is the best?

I. introduction of cucumber anthracnose

In recent years, cucumber anthracnose is an important disease harmful to cucumber, mainly because it is caused by infected bacteria during introduction. The disease usually occurs in spring and autumn, and the control methods are difficult. If it is not controlled properly, it will have a great impact on the yield of cucumber in the same year.

1. Symptoms of cucumber anthracnose

Cucumber anthracnose mainly occurs in seedlings and adult plants, in which the incidence of seedlings is higher, the main symptoms are semi-oval light brown disease spots on the edge of leaves, orange-yellow spots, adult leaves infected, the disease spots are nearly round, grayish brown to reddish brown, when serious, the leaves dry up.

two。 Cause of anthracnose in cucumber

The cause of cucumber anthracnose is caused by sporophyte infection. If the soil is sticky, poor drainage, partial application of nitrogen fertilizer, insufficient light and untimely ventilation, the disease will be more serious, and the pathogen will spread with the help of wind and rain, irrigation water, agricultural operations and so on. Cause re-infection.

II. Control methods of cucumber anthracnose

Prevention and control of cucumber anthracnose is the most important. We can control cucumber anthracnose through the following points.

1. Selection of disease-resistant cucumber varieties

According to the old farmer, now cucumber disease-resistant varieties are better, such as Jinyan 4, Zaoqing 2, Zhongnong 1101, etc., which need to be selected according to the climatic conditions of their own areas. Then select the disease-free seeds, soak the cucumber in 50 degrees warm water for 20 minutes before planting, and then sprout.

two。 Practise crop rotation

If the rotation is carried out for more than 3 years, the seedbed should be disinfected or disinfected with disease-free soil to reduce the source of primary infection. The use of plastic film mulching can reduce the chance of bacteria transmission, reduce the damage, and increase the application of phosphorus and potassium fertilizer to improve plant disease resistance.

3. Strengthen the management of temperature and humidity in shed

(1) planting cucumbers in the greenhouse requires ecological control, mainly through ventilation and moisture drainage, to keep the humidity in the greenhouse below 70%, and to reduce leaf condensation and water spitting.

(2) Field management, disease and pest control, vine binding and harvesting should be carried out after the dew is dry to reduce the spread of man-made transmission.

The above three points are the introduction of the prevention and control methods of cucumber anthracnose.

What medicine is the best for cucumber anthracnose?

In addition to the prevention and control of cucumber anthracnose in daily life, if related diseases are found, they need to be treated with chemicals in time. Generally, the following agents can be used to treat cucumber anthracnose.

1. Smoke with 45% chlorothalonil smoke remover, 0.5 jin per mu

two。 Spray 2 jin per mu with dust, 5% chlorothalonil or carbendazim.

3. The cucumber anthracnose was sprayed with 50% methyl thiophanate wettable powder 700x and 75% chlorothalonil wettable powder 200x, or 80% anthrax Fumei wettable powder 800x or 65% mancozeb wettable powder 50000x, or 70% mancozeb wettable powder 400x, or 2% antimycin 200x, 10% high water dispersible granule 1500 times.

These are the best treatments for cucumber anthracnose.

Summary: the above content is about the introduction of cucumber anthracnose prevention and control methods, hoping to help cucumber growers in need. This paper is integrated with the Internet.