Effect of the environment with a high dose of sex pheromone on the calling and mating behavior of Spodoptera frugiperda(Smith)
In this paper,a comprehensive study was conducted on the calling and mating behavior of Spodoptera frugiperda under the environment with a high dose of sex pheromones Z7-12:Ac,Z9-14:Ac and Z11-16:Ac,sprayed automatically at different time intervals in a wind tunnel,with the objective of laying a basis for the development of mating disruption technology.The results showed that,in the environment of high dose of sex pheromones,the activity of male moth begins later,while that of female moths remained unchanged,exhibiting a time disparity in the activity between male and female moths.In addition,both the mating rate and mating duration decreased significantly,and the mating day-age was significantly delayed for two days.The delay in the mating day-age caused a reduction in the number of egg production and hatchability rate.The time interval of spraying sex pheromones had a significant effect on the titer of sex pheromones released by S.frugiperda,when interval was 5,10,or 20 min,the titer of sex pheromone released by female moths decreased significantly,with the lowest level at 5-minute interval.Therefore,the high-dose sex pheromone in the environment not only had a significant impact on the orientation behavior of male moths towards the sex pheromone source but also had a significant impact on the calling and mating behavior between female and male moths.
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