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The spring rain continues and temperature rises, it is also the season for downy mildew and blight diseases to break out. In recent years, due to the irrational use of fungicides, downy mildew and blight disease have occurred serious resistance, the usage of pesticides is increasing, and so on, it has entered a vicious circle with no way out, which cause great economic losses to growers.
In early spring, there is little sunlight, low temperature, high rainfall, and high humidity. The requirements for vegetable planting are strict, a little careless management is easy to reduce yields and cause serious economic losses. \nHow to manage scientifically to grow high-quality and high-yield vegetables in early spring?
Cucumber bacterial angular spot, cabbage soft rot, peach bacterial shot-hole disease, fruit tree canker, tomato pepper bacterial leaf spot and other bacterial diseases will seriously affect crop yields and the income of growers. The general fungicides commonly used by growers are easy to have resistance with unsatisfactory effects. Microbial fungicides are poor in treatment effect and slow to take effect.
When talking about cabbage worms, many pictures of leafy vegetables being destroyed by cabbage worms will always flash in the grower\'s mind, leaves were eaten up with full of holes, only stems or petioles remain. all leaves are covered with the feces of cabbage worms, the yield and quality of vegetables were greatly reduced.
Which kind brassinolide is more active? this is the most sensitive topic in the brassinolide industry with various opinions. Some people use the conclusions of scientists, and someone use the actual effects of field trials to explain the problem.
There are many fungal diseases of melons, which often cause big troubles for growers, such as: leaf spot, powdery mildew, downy mildew, anthracnose, etc. These fungal diseases are difficult to control, once treatedt afterdiseases occurred, it will often cause residual disease spots and unhealthy leaves, which will affect yields, so growers should spray preventive fungicide in advance.
There are different kinds of sugarcane underground pests, with high population density and long-term serious damage sugarcane cultivation. They hide in soil for a long time to harm sugarcane, if growers do not take effective control measures, it will cause uneven seedling growth, lack of seedlings and ridge breaking, which will seriously affect the yield of sugarcane.
Wheat scab is a common and important disease in the main wheat cultivation areas, in recent years, with the climate change and the increase of straw returning to the field, it shows an increasing trend year by year. After this disease occurred, the infected wheats showed obvious symptoms such as seedling dead, ear rot and stalk rot, which resulted in reduced yield and wheat quality, and caused a serious threat to wheat safety production.
Have growers founded that if a certain kind of vegetables are continuously planted on the same field parcel for 3 to 5 years, its yield and crop quality are likely to reduce. People usually think that it was caused by the lack of nutrients in soil or some plant diseases and insect attack on the ground. In fact, the damage is most likely caused by soil-borne diseases.
Red spider mites are common pest on flowers, which often gather on the back of flowers, they spin silks and weave webs to harm flowers. Due to the small size, it is difficult to find out with naked eye in the early stage, and flowers have been badly damaged when red spider mites are found.
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