The Population Dynamics and Spatial Distribution Pattern of European Sunflower Moth, Homoeosoma nebulella

Author of the article:BAI Quan-jiang1

Author's Workplace：Plant Protection Institute, Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences

Key Words：Sunflower Moth; Population Dynamics; Spatial Distribution Pattern; Inner Mongolia

Abstract：For the purpose of determining the time of control and choosing optimal control methods, and giving a scientific instruction on applying the methods of adjusting planting date, pheromone trapping and using of Trichogramma in the field, we studied the population dynamics and spatial distribution of adult Homoeosoma nebulella by using the pheromone trap in Bayannur, Inner Mongolia from 2009 to 2011. The results showed that the emergence of Homoeosoma nebulella adults was begun at mid-July and would last till late September. There were two distinct flight peaks in a year, the first peak appeared during the time between late June to early July, and the second peak appeared during the time between late July to middle August. The local cultivated sunflower would receive damage caused by the lava of two generations, and the degrees of damage was closely related with the goodness of fit between flowering period and moth flight peak. Based on testing five indices of aggregation and analyzing the value of λ, the distribution of adult sunflower moth in the field showed aggregated pattern, and such pattern is resulted