性诱剂监测邵阳烟区斜纹夜蛾发生动态研究

Study on Occurrence Dynamics of Spodoptera litura in Shaoyang Tobacco Area by Sex Pheromone

为了探明邵阳烟区斜纹夜蛾的危害规律及影响诱蛾效果的关键气象因子,2015—2017年在湖南省邵阳县利用性诱剂对斜纹夜蛾进行了3年的诱捕监测,并对诱蛾量与气象因子进行了相关性分析。结果表明,邵阳烟区斜纹夜蛾发生高峰为5月上旬至7月下旬,6月中下旬达到最大值。诱蛾量与气象因子相关性分析表明,斜纹夜蛾诱蛾量与日平均气温、日最高气温、日最低气温成极显著相关,即斜纹夜蛾诱蛾量随气温的升高而增多。因此,邵阳烟区斜纹夜蛾的防治最佳时期为5—7月,其间如遇干旱高温天气,斜纹夜蛾繁殖、生长速度加快,群体数量增加,此时应当加强对斜纹夜蛾的防治力度,一方面增加性诱剂安置密度,另一方面科学地使用化学农药,从而达到防治目的。

In order to find out the damage regularity of Spodoptera litura and the key meteorological factors affecting the moth-inhibiting effect in Shaoyang tobacco area,the three-year trapping and monitoring of S.litura was carried out in Shaoyang County of Hunan Province from 2015 to 2017,and the correlation between moths and meteorological factors was analyzed. The results showed that the peak of S.litura in Shaoyang tobacco area was from early May to late July,and reached the maximum in mid-to-late June.The analysis of the factors related to moths and meteorological factors showed that,the moths of S.litura were significantly correlated with daily average temperature,daily maximum temperature and daily minimum temperature,the number of S.litura increased with increasing temperature.Therefore,the best period of prevention and control of S.litura in Shaoyang tobacco area was from May to July.During this period,the growth rate of S.litura would accelerate and the number of populations will increase when drought and high temperature occurred.At this time,the prevention and control of S.litura should be strengthened.On the one hand,the density of sex pheromone increased,and on the other hand,chemical pesticides were used scientifically to achieve the purpose of prevention and control.