木薯的大田生产受到生物性和非生物性因素限制。生物限制包括病虫害导致木薯大幅减产。根据诊断调查,在贝宁、加纳、尼日利亚,木薯弯孢菌茎枯病侵染率分别为9%、13%和38%。病害的感染率(根据取样的总株数中具有明显症状数)为0~80%,而严重损伤率(损害数)介于2%~5%之间。根据温室 Field production of cassava is limited by both biological and non-biological factors. Biological restrictions, including pests and diseases, have led to a dramatic cut in cassava production. According to diagnostic investigations, the prevalence of stem blight in Curubutum was 9%, 13% and 38% respectively in Benin, Ghana and Nigeria. The infection rate of the disease (based on the number of obvious symptoms in the total number of samples) is 0 to 80%, and the severe damage rate (damage number) is between 2% and 5%. According to the greenhouse