龙眼树荔枝蝽越冬成虫发生规律及交配节律

目的]研究荔枝蝽越冬成虫的发生规律及交配节律,为其有效防治提供科学依据.方法]在荔枝蝽越冬成虫交配期,对龙眼树上荔枝蝽越冬成虫交配持续时间、48 h内荔枝蝽越冬成虫昼夜发生规律及交配情况、4~6月荔枝蝽越冬成虫发生及交配情况进行观测.结果]在观察的荔枝蝽中,交配持续时间在8~9 h的约占18.2%、10~11h的约占54.5%、13h以上的约占27.3%;平均每天观察到的荔枝蝽成虫数最大值出现在9:00,其次是13:00;荔枝蝽成虫每天交配对数最大值出现在9:00,其次为13:00;在1d内观察到的荔枝蝽成虫数与交配对数随时间的变化出现两次波峰和低谷,高峰期出现在9:00和13:00,低谷期出现在6:00和19:00;荔枝蝽交配对数与观察到的成虫数呈正相关关系;从4月1日起,观察到的成虫数和交配对数徘徊上升,至4月6日均达到最高值,此后观察到的成虫数和交配对数均呈逐渐下降趋势,至6月11日后基本未发现荔枝蝽越冬成虫.结论]4~5月为荔枝蝽越冬成虫交配高峰期,荔枝蝽越冬成虫交配出现两次高峰期和低谷期,高峰期分别出现在9:00和13:00,低谷期出现在6:00和19:00;成虫行多次交尾和产卵,交尾持续时间一般为10~11h,交尾活动昼夜均可进行.

Occurrence regularity and mating rhythm of overwintering Tessaratoma papillosa imago on longan tree

Objective]The purpose of the current experiment was to study occurrence regularity and mating rhythm of Tessaratoma Papillosa imago on longan tree and provide scientific references for effective prevention and control. Method]During the mating period of overwintering Tessaratoma papillosa imago, the mating duration, occurrence regularity, and mating rhythm within 48 h as well as occurrence and mating during April and June were observed. Result]The results showed that among all the observed Tessaratoma papillosa imagoes, 18.2% imagoes’ mating duration was 8-9 h, 54.5% imagoes’ mating duration was 10-11 h, and 27.3% imagoes’ mating duration was around 13 h or more. According to daily observation, the maximum adult quantity and their mating logarithm max of Tessaratoma papillosa imagoes appeared at 9:00 followed by 13:00. There were two peaks (at 9:00 and 13:00) and troughs (at 6:00 and 19:00) for the adult quatity and its mating pairs logarithm of the observed Tessaratoma imagoes as times changed. Mating pairs were positively correlated with the adult quantity of observed imagoes. From April 1, the adult quantity of observed imagoes and mating pairs increased and reached the maximum on April 6, then gradually went down, after June 11, nearly no adult Tessaratoma papillosa imago was found. Conclusion]The mating peak of Tessaratoma papillosa imagoes was from April to May, and there were two mating peaks (9:00&13:00) and troughs (6:00&19:00) every day. Imagoes repeatedly mate and spawn, while mating usually lasted for 10-11 h either in the daytime or at night.