Control methods of diseases and insect pests of water chestnut

Water chestnut is a common fruit and vegetable in daily life. it can be used not only for raw fruit, but also for stir-fried vegetables or soup. It is rich in nutrition, has excellent therapeutic effect, and is deeply loved by young and old. It has been planted in all major areas of our country. But let the growers worry is the diseases and insect pests, seriously affect the output and quality of water chestnut, reduce the economic benefits of growers, then what are the diseases and insect pests harmful to water chestnuts, how to prevent and control? Next, let's take a look at the pro-agricultural network.

1. Pathogenic diseases

The main pathogens of water chestnut are water chestnut stem blight, water chestnut wilt and chestnut hoof stem rot. These three diseases are generally prevalent from September to October, and there are also many kinds of plant diseases cross-infection. Water chestnut stem blight, also known as water chestnut plague, the plant does not bear chestnut or small chestnut after infection, which affects the yield. When the disease is serious, there may be no harvest. When the disease occurs, the stem appears waterlogged disease spot. With the development of the disease, the disease spot expands, and it is best for the stem to die and lodge. Water chestnut Fusarium wilt is similar to chestnut stalk blight, when the disease occurs, the stem appears gray spots, there are depressions, the disease spots will expand and merge, when the harm to planting is less, but also can grow and develop normally. With the development of the disease, the tissue becomes soft and easy to break, and when the humidity is high, the lesion will rot at the lesion.

Prevention and control methods: the main prevention of pathogenic diseases, early do a good job of soil disinfection and sterilization, reduce pathogens, increase the application of phosphorus and potassium fertilizer, improve plant disease resistance, adopt the method of rotation, reasonable rotation, reduce the degree of disease. Timely control after the disease is found, stem blight and Fusarium wilt can be sprayed with 50% carbendazim 600 times solution combined with other chemicals, while hoof stem rot can be sprayed with 40% pentachloronitrobenzene powder 500 mi 600 times solution.

2. Physiological diseases

The main physiological disease is the phenomenon of red tail, which is characterized by the dry seedling of red tail or the dryness of a stem at the top, which is mainly caused by crop rotation and lack of trace elements such as boron, zinc, iron and so on.

Control methods: reasonable rotation, borax, zinc sulfate 2kg can be added when fertilization, can prevent the occurrence of this disease, after the occurrence of potassium dihydrogen phosphate diluted with water, spraying foliar fertilizer, the effect is excellent.

3. Insect pests

The insect damage of water chestnut is less, and the main pest is white borer. White borer generally harms the third and fourth generation larvae of water chestnut, which will eat in the stem of the disease, which will hinder the prevention of water chestnut and water transport, and finally lead to stem rot, resulting in reduced yield and quality.

Prevention and control methods: irrigation the rice field in winter, drown the overwintering borer, reduce the source of insects, when the pest is prevalent, you can use insecticides to control, when the waist injection is easy to use dose and concentration, so as not to harm the growth of water chestnut, it can also be used to control its natural enemies, Trichogramma and red ants.

The above are the prevention and control methods of water chestnut diseases and insect pests brought by the pro-agricultural network. I hope I can help you. If you want to know more about water chestnut planting, please pay attention to the pro-agricultural network.