林州市核桃举肢蛾种群动态及成因分析

Population Dynamics of Atrijuglans hetaohei and Analysis of Its Causes in Linzhou

为了解核桃举肢蛾种群动态变化规律,于2005-2011年在林州市通过性诱剂诱集成虫对核桃举肢蛾种群进行了系统观察,并分析了气候条件及不同生境对该虫种群变动的影响。结果表明,核桃举肢蛾成虫种群在林州1a有2次发生高峰,第1代成虫发生高峰在4月中下旬,第2代成虫发生高峰在6月中下旬。分析表明,冬季最低温度、4月中旬降雨量是影响核桃举肢蛾第1代成虫种群数量变动的主要因子,6月中旬降雨量是第2代成虫数量变动的主要影响因子。不同生境条件下核桃举肢蛾危害率不同,深山沟谷和阴坡地带发生最重,被认为是影响核桃举肢蛾种群数量变动的又一重要因子。

In order to learn the population dynamics changes of Atrijuglans hetaohei （Lepidoptera. Heliodinidae）,a systematical monitoring through pheromone trapping from 2005 to 2011 was conducted on the population dynamics of A. hetaohei in Linzhou,Henan province,and the factors in relation to its population fluctuation, including temperature, rainfall, and habitats were analyzed. The results showed that the adult population of A. hetaohei occurred with 2 peaks,the first one in mid to late April and the second one in mid to late June. The analysis showed that the win- ter minimum temperature and rainfall in mid April was the main factors affecting the population dynamics of the first generation, while the rainfall in mid June was the major factor restricting population dynamics of the second generation. The hazard rate of A. hetaohei was different in different habitats, which showed the most serious in mountain valleys and shady areas. Therefore, the habitat was considered to be another important factor affecting the population fluctuation of A. hetaohei.