What is the best medicine to control cucumber anthracnose?

Those who grew up in rural areas know that cucumbers are generally planted in March to April each year, and they need careful care during the growing process to bear fruit. I remember that when I was a child, my mother liked to grow cucumbers in the garden, and disease control was indispensable, such as spraying medicine when there are insects on the cucumber leaves, otherwise the cucumber seedlings will wither and eventually die. So do you know the control methods for cucumber anthracnose? And what medicine is best to use?

I. Introduction to cucumber anthracnose

In recent years, cucumber anthracnose has been an important disease harming cucumbers, mainly caused by bacteria carried during introduction of seeds. The disease generally occurs in the two seasons of spring and autumn, and the control methods are relatively difficult. If control is not appropriate, it will have a huge impact on the cucumber yield of that year.

1. Symptoms of cucumber anthracnose

Cucumber anthracnose mainly occurs on seedlings and grown plants, with a higher incidence rate in seedlings. The main symptom is the appearance of semi-elliptical light brown lesions on the leaf edges, with orange-yellow dot-like gelatinous matter on them. When mature leaves are infected, the lesions are nearly round, gray-brown to red-brown, and in severe cases, the leaves dry up.

2. Causes of cucumber anthracnose

The cause of cucumber anthracnose is infection by spores. If the soil is clayey, drainage is poor, nitrogen fertilizer is applied excessively, field light is insufficient, and ventilation is not timely, the disease will be more severe. The pathogen spreads with wind and rain, irrigation water, and farming operations, causing re-infection.

II. Control methods for cucumber anthracnose

The key to cucumber anthracnose is prevention and control. We can prevent and control cucumber anthracnose through the following points.

1. Select disease-resistant cucumber varieties

According to experienced farmers, good disease-resistant cucumber varieties now include Jinyan No. 4, Zaoqing No. 2, Zhongnong 1101, etc., and each place needs to choose according to its own regional climate conditions. Then select disease-free seeds. Before planting cucumbers, soak them in 50°C warm boiled water for 20 minutes, then carry out sprouting.

2. Implement crop rotation

Implement a crop rotation method of more than 3 years. For the seedbed, disease-free soil should be selected or the seedbed soil should be disinfected to reduce the initial infection source. Using plastic film mulching can reduce opportunities for pathogen spread and lessen damage, and applying more phosphorus and potassium fertilizer can improve plant disease resistance.

3. Strengthen greenhouse temperature and humidity management

(1) When growing cucumbers in a greenhouse, ecological control is needed, mainly through ventilation and dehumidification, so that the humidity in the greenhouse remains below 70%, reducing leaf condensation and guttation.

(2) In field management, removing diseased plants and eliminating pests, tying vines, and harvesting should all be carried out after the dew has dried, to reduce artificial spread.

The above 3 points are an introduction to the control methods for cucumber anthracnose.

III. What medicine is best for cucumber anthracnose?

In addition to preventing and controlling cucumber anthracnose in daily life, if related diseases are found, it is necessary to use chemicals in time. Generally, the following chemicals can be used to treat cucumber anthracnose.

1. Use 45% chlorothalonil smoke agent for fumigation, 0.5 jin per mu each time;

2. Use dust agent, 5% chlorothalonil dust agent or kemeling dust agent, 2 jin per mu, for spraying;

3. Use 50% thiophanate-methyl wettable powder at 700 times plus 75% chlorothalonil wettable powder at 200 times liquid, or 80% anthracnose fumate wettable powder at 800 times liquid, or 65% mancozeb wettable powder at 500-600 times liquid, or 70% mancozeb wettable powder at 400 times liquid, or 2% antimycin at 200 times liquid, 10% difenoconazole water-dispersible granules at 1500 times liquid for spray control of cucumber anthracnose.

The above are the best chemicals for treating cucumber anthracnose.

Summary: The above content is an introduction to control methods for cucumber anthracnose, and I hope it can help cucumber growers in need. This article is compiled from the Internet.