大猿叶虫交配行为的观察

大猿叶虫Colaphellus bowringi Baly是十字花科上的重要害虫,一生能多次交配。本试验在25℃,光周期L∶D=12∶12条件下观察了大猿叶虫成虫连续7d的交配行为。结果表明:(1)每日平均交配(5.67±0.26)次,最高可达11次,不同日龄间的交配次数存在显著差异。(2)平均每日用于交配的时间为(238±10)min,占总时间的33.5%,最长可达493min,占总时间的68.5%,不同日龄间的交配时间有极显著差异。(3)交配持续时间最短8min,最长达289min,平均为(48±2)min;同一日内,随着交配次数增加,交配持续时间逐渐缩短;不同日龄间的交配持续时间存在显著差异。(4)相邻两次交配之间的间隔时间最短5min,最长300min,平均交配间隔(75±3)min;交配间隔时间随日龄的增加而明显延长。

Mating behavior of Colaphellus bowringi

The cabbage beetle,Colaphellus bowringi Baly is a serious pest of crucifers. These beetles mate repeatedly within their lifespan. The mating behavior of the C. bowringi was systematically observed at a photophase of L∶ D = 12∶ 12 at 25℃ for 7 consecutive days. The results were as follows：（1） Pairs mated on average （5. 67 ± 0. 26） times per day and the highest incidence of mating was 11. There were significant differences in mating frequency among different aged pairs. （2） Beetle spent an average of （238 ± 10） min mating per day,i. e. 33. 5% of their total time. The longest recorded amount of time engaged in mating was 493 min per day; 68. 5% of the total time. The total time spent mating per day was significantly different among different aged pairs. （3） Mating duration ranged from 8 to 289 min with a mean of （48 ± 2） min. In the course of one day, mating duration gradually shortened with increasing mating frequency. Mating duration was significantly different among different aged pairs. （4） The interval between two consecutive mating bouts ranged from 5 to 300 min with a mean of （75 ± 3） min. The interval between consecutive mating bouts significantly increased with age.