The konjac disease is most severely affected by rot and white peony disease. The rot disease is caused by bacterial infection and can occur during or during konjac growth. This disease not only has a high incidence, but also has a rapid onset of disease. It generally takes about 7 days from the onset of the disease to the inoculation of seedlings, and will fall for 2 to 3 days at high temperatures. Prevention and cure: When it is found that there are irregular small spots on the leaves that resemble an oil immersion, the enemy can use 500 to 800 times of enemy pine powder, or use 600 to 800 times of 50% dexamethasone to control spraying.