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Activities characteristics of adult of Spodoptera frugiperda in autumn and winter season using sexual trapping in Yunnan.

Abstract

Based on the monitoring data of Shanxun TELEMO© remote real-time pest monitoring system in autumn and winter in Yunnan, we analyzed the Spodoptera frugiperda population dynamics, adult moth activities and the correlation relationship With the temperature and humidity. The results showed that S. frugiperda occurred all year-round in four monitoring sites, from August 15' to December 31"1, 2019, the amount of moths captured in the field was varied greatly, the total amount of moths sequence was South Yunnan > Central Yunnan > Northeast Yunnan > Southwest Yunnan. In the South and middle of Yunnan, where the Winter corn planting area, the number of moths captured was highest, during the monitoring period, the average number was 9.42moth/d and 8.54 moth/d. The peak time was on August 17 and September 19, and 85 and 146 moth were captured, respectively; in the South of Yunnan, winter corn scattered planting area, the relative humidity was high in the field, the number of moths captured was low, during the monitoring period, the average number was 1.21 moth/d, the peak time was on December 23, and 26 moth were captured; In the Northeast Yunnan, the adult amount attracted was higher. During the monitoring period, the average number of moths lured per day was 4.47 moth/d, the peak time was 6 September 28, and 142 moth were captured. The daily activity rhythm of male moths was 'morning and evening double peak type", the peak period of 18 1 00 - O3 3 00 and 07 3 00 - 11 I 00 accounted for 60.79% and 24.97% of the total captured number, respectively. There was a weak correlation relationship between the amount of moths and the air temperature and humidity during the peak period Of adult activity. The correlation coefficient between the amount of moths and the temperature was I r I = 0. l4 <0.3, P =0.00 <0.01, and the correlation coefficient between the amount of moths and the relative humidity was I r 1 =0. ()7 <0.3, P =0.04 <0.05. The present study provides a guidence for improving the monitoring methods of synthetic seX pheromone traps and the trapping and killing methods of adult moth of S. fiugiperda.