云南河口地区香蕉黑星病与炭疽病发生规律的再研究

摘要

针对云南省河口地区气候环境的异常变化,采用定点监测、分级调查法对云南河口地区香蕉黑星病和炭疽病的发生规律进行了再研究。结果表明：降雨量及温度的异常变化对香蕉黑星病和炭疽病的发生危害影响最大。河口县香蕉黑星病7月份开始迅速扩散,9～12月份达到高峰期；不同栽培地区香蕉黑星病的危害率及病情指数具有一定的差异,危害率依次为河口东部地区＞中南部地区＞西部地区,但并不具有显著性差异；海拔对黑星病的危害情况具有一定的影响,海拔越高危害性越大；香蕉炭疽病在1～3月发病率较低,8～12月为发病高峰期；河口县西部地区危害率较东部和中南部较低,随着海拔的升高,危害率逐渐升高,但并不显著。%Aiming at the climate change in Hekou county, fixed -point monitoring and classification survey was investigated in order to study the occurrence and harm regularity of banana scab and anthracnose in Hekou. The results showed that occurrence and development of the disease were influenced by temperature and rainfall. the harm rate and disease index was influenced by altitude, the higher the altitude, the higher the harm rate and disease index, but its difference didn't reach significance level. The banana scab began to spread in July, when the temperature rise and reached peak in September to December; the different cultivation areas had different resistance to the harm rate and disease index, eastern district > central and southern district > western district, but those data was no significant difference. Harm of banana anthracnose maintained a lower level in January to March, then reached high peak in August to December; the harm rate in the western district was lower than the eastern district and central and southern district, but its no significant difference.