1、 Leaf spot

Symptoms: there will be some small black spots on the leaves, which will gradually expand later, causing problems in the whole leaf and falling down later

Solution: pay attention to protection at ordinary times to prevent the occurrence of diseases. After the disease, remove the diseased leaves in time, and spray drugs for thorough treatment. Carbendazim, mancozeb, < a href can be sprayed=“ https://baike.sogou.com/lemma/ShowInnerLink.htm?lemmaId=73762647& ; ss_ c=ssc. citiao. Link "> tobuzin < / a >, metalaxyl manganese zinc, etc. can play a certain effect

2、 Leaf blight

Symptoms: in the environment of high temperature and humidity and poor ventilation, it is easy to be infected with the disease. At first, small yellow spots are formed on the leaves, and then turn gray white, as if the leaves are dry

Solution: do a good job in prevention, apply fertilizer reasonably to enhance resistance, and spray agents such as mancozeb after onset

3、 Root rot

Symptoms: the disease will lead to root rot, affect the absorption function, and eventually lead to the death of the whole plant

Solution: strengthening field management and selecting varieties with good disease resistance can increase the ability of disease resistance. After the disease, disinfect the soil, dilute and irrigate the roots with carbendazim mixed with water, and eliminate underground insects and nematodes, which can reduce the spread of the disease