Lodging of Dendrocalamus latiflorus trunk is generally a symptom caused by root rot, and the main reason is root rot or dry disease caused by too wet watering or too hard pot soil. Treatment: Cut off dead leaves and severely withered branches. Insert the gently shaken basin soil into the basin edge with loosening tools to make the basin soil loose and breathable, which is beneficial to the recovery and growth of roots. Water less at ordinary times to ensure that the root system is not easy to rot after the pot soil is dried, and loosening the soil properly for 2 months is beneficial to the root system growth. Prevention and control: use 800- 1000 times solution or 1-2kg water to add1gentamicin, and spray the whole plant once every 7 days for 3 times continuously.