作者：Chengping; FAN; Enfa; CHEN; Junming; Y...tobaccospodopteralituraoccurrenceregularitysexpheromonecentralguizhou
摘要：The Spodoptera litura occurrence quantity in Tianlong Town,Pingba County,Anshun City was dynamically monitored by an insect sex pheromone electronic measurement and forecast system in 2015 and 2016 and the trapped effect of S.litura was studied by the home-made S.litura sex pheromone traps in Baishiyan Town,Ziyun County and Tianlong Town,Pingba County in 2016 to accurately grasp the occurrence regularity of S.litura and apply insect sex pheromone for controlling S.litura in Central Guizhou tobacco-growing region.There are 5 generations of S.litura in a year in Central Guizhou region.The first generation of S.litura occurs from late April to middle May,the second from middle-to-late July to middle-to-late August,the third from early-to-middle August to the end of September,the fourth is in the end of October and the fifth in the end of November.S.litura emigrates or enters into the overwintering stage in December.S.litura is almost in active in the daytime during the peak occurrence period of S.litura adults.The first mating time of S.litura is at 17:30 and its peak mating time is about 22:00.The second mating time of S.litura is at 1:00-5:00 and its peak mating time is about 2:30.The trapped S.litura quantity presents an obvious layer-belt distribution that the number in the outer ring is significantly higher than that in the middle ring,and the number in the middle ring is significantly higher than that in the inner ring.The number of trapped S.litura is higher around the outer ring of the testing field and at the draught position than in the low-lying land and inner flat ground.
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