四川省凉山州烟区烟蚜发生规律

Occurrence regularity of Myzus persicae (Sulzer) in tobacco growing area of Liangshan state,Sichuan province

2017-2018年,采用五点调查法对四川省凉山州3个主要植烟县的烟蚜(Myzus persicae)发生情况进行了调查研究。凉山州3个植烟县烟蚜的发生具有明显的时序动态,但年度间差异较大。2017-2018年四川省凉山州3个主要植烟县的烟蚜为单峰型和M型混合发生,3个县2018年烟蚜发生高峰期较2017年均早15~30 d。温度和雨量是影响烟蚜发生时间和发生量的主要因素,温度的提高和雨季的提前会导致烟蚜的发生时间提前,凉山州主要烟区的烟蚜防治关键时期是5月下旬至6月下旬,具体防治时间根据当年气候适当调整。

From 2017 to 2018, the occurrence of Myzus persicae in three tobacco growing counties in Liangshan state prefecture, Sichuan province was investigated with 5 point sampling method. The occurrence of Myzus persicae in three tobacco growing counties in Liangshan state prefecture has obvious temporal dynamics, but the annual difference is great. From 2017 to 2018, the occurrence of Myzus persicae in three major tobacco planting counties was a mixture of single-peak type and M type. The peak of Myzus persicae occurrence in the three counties in 2018 was 15~30 days earlier than that in the average year of 2017. It is found that temperature and rainfall are the main factors affecting the occurrence time and amount of Myzus persicae. Higher temperatures and earlier rainy seasons lead to earlier occurrence of peach Myzus persicae, therefore,the critical period of Myzus persicae control in tobacco growing areas of Liangshan state prefecture is from late May to late June. The specific time for prevention and control should be appropriately adjusted according to the current climate.