How to cure cucumber disease

Cucumber is a common fruit, can also be eaten directly raw, is a lot of people like to eat. Farmers who have experienced planting know that cucumbers are prone to diseases. So, how to treat cucumber disease?

Downy mildew of cucumber

The leaves were mainly damaged, the seedlings were susceptible, and round bright yellow disease spots appeared on the front of cotyledons, which reached the peak in the peak melon stage. The primary waterlogged disease spot of the leaf is enlarged and connected into a large disease spot. In severe cases, the disease leaf curls and turns yellow-brown and dry, and the disease spot on the back of the leaf grows thick purple-gray to purple-black mold.

Prevention and control methods:

1. Improve cultivation techniques

The disease can be reduced by adopting measures such as high border plastic film mulching combined with drip irrigation, increasing base fertilizer, topdressing nitrogen fertilizer during melon setting period and preventing flood irrigation.

two。 Strengthen chemical prevention and control

After planting, we should strengthen the prediction and forecast, find the disease, and apply the medicine in time.

Commonly used control agents: 75% chlorothalonil wettable powder 500 times or 70% mancozeb wettable powder 500 times, sprayed in the morning of sunny days, once every 7-10 days, 3-4 times in a row.

Fusarium wilt of cucumber

Cucumber Fusarium wilt, also known as vine cutting disease, is a serious disease of cucumber in protected areas, especially in continuous cropping greenhouse and greenhouse. Generally speaking, the incidence of greenhouse with short planting years is 5%-10%. With the increase of continuous cropping years, the disease is aggravated, and the serious incidence rate is more than 50%, even can not be planted.

Prevention and control methods:

1. Seed disinfection

Soak the seeds in 55 degrees warm water for 15 minutes before sowing, or soak the seeds with 50% carbendazim wettable powder 500 times solution for 60 minutes, or roast the dry seeds at 70 degrees for 72 hours, wait for cooling and sowing.

two。 Strengthen cultivation management

Adopt high border and plastic film cultivation, apply sufficient rotten base fertilizer to enhance plant resistance, avoid flood irrigation during melon fruiting period, and take good drainage measures in rainy weather.

3. Soil disinfection in shed

After mixing with 50% carbendazim wettable powder and 30kg fine dry soil per mu, ditch or hole application was applied at the time of planting.

Third, cucumber powdery mildew

Cucumber powdery mildew mainly harms leaves, petioles and stems, and fruits are generally not harmed; at the beginning of the disease, there are white and nearly round small powder spots on the front and back of the leaves, which will cover the whole leaf surface with the spread of the disease, and will become grayish white in the later stage, and wither and yellow in severe cases. The plant withered and died.

Prevention and control methods:

1. Chemical control

At the initial stage of the disease, 2000 times of 25% triadimefon wettable powder or 50% methyl topiramate wettable powder were sprayed every 7-10 days for 2-3 times.

two。 Strengthen cultivation management

Avoid planting flowers susceptible to powdery mildew in greenhouse; when applying base fertilizer, it is necessary to apply phosphorus and potassium fertilizer reasonably.

Strengthen greenhouse ventilation and indoor ventilation to reduce humidity.

These are the three common diseases of cucumber, in addition, there are brown spot, bacterial angular spot, anthracnose, quenching, blight, blight, gray mold, target spot and other diseases. The main reason for the disease is that with the warming of the weather, the gradual rise of temperature and improper management, it is caused by the environment of high temperature and high humidity. The symptoms of these diseases are very similar.