贵州黔南烟草马铃薯Y病毒病重病区蚜虫发生规律研究

Study on Occurrence Regularity of Aphid of Severe PVY Disease in Qiannan Tobacco Planting Area of Guizhou Province

为了有效降低烟草马铃薯Y病毒病的发病率，应加强烟蚜发生规律预测预报工作，以测报指导防治。在贵州黔南烟区马铃薯Y病毒病重病区，对有翅蚜和无翅蚜的种群消长动态进行了调查。结果表明：黔南烟区有翅蚜发生高峰期为5月上旬～6月初，整个5月有翅蚜活动均较频繁，6月上旬后发生数量开始大幅度减少；无翅蚜发生高峰期为5月下旬～6月中旬，6月下旬发生数量开始大幅度减少。根据黔南烟区烟蚜的发生规律，认为烟蚜的重点防治时期为烟苗移栽期。

In order to degrade the incidence of tobacco PVY Disease efficiently, forecast of occurrence regularity of tobacco aphid should be strengthen and control was directed via forecast. Investigation of population dynamics of winged and wingless aphids was conducted in tobacco planting area where PVY disease severely occurred in Qiannan of Guizhou Province. The results indicated that winged aphids occurred peak period was from early May to early June. The movement of winged aphids was comparatively frequent during the whole May, and the occurred number of aphid was decreased dramatically in early June. Wingless aphids peak period was from late May to middle June, and the occurred number of wingless aphids was decreased dramatically in late June. On the basis of occurrence regularity of Qiannan tobacco aphid, it was suggested that the key control period of tobacco aphid was transplanting stage of tobacco seedling.