赤眼卵寄生蜂Trichogramma chilonis之生態及產卵習性

Ecological Studies on an Egg Parasitoid, Trichogramma chilonis with Special Reference to Ovipositional Habits

陳健忠(Chien-Chung Chen) ； 邱瑞珍(Shui-Chen Chiu)

《中華農業研究》 34卷2期 (1985/06) Pp. 207-212

https://doi.org/10.29951/JARC.198506.0009

摘要

本研究在民國71年至72年間在本所稻田進行赤眼卵寄生蜂Trichogramma chilonis之田間調查與觀察，得知該蜂在稻田之寄主以稻縱捲葉蟲(Cnaphalocrocis medinalis)最爲主要，其自然寄生率牛均約爲52.9%，羽化率約爲72.0%，多在稻叢間活動，其活動盛期通常在正午至傍晚。雌雄性比約爲2.38:1。卵齡1至3天之稻縱捲葉蟲卵其被寄生數及寄生蜂羽化數均無顯著差異。但在飼育容器中，該蜂棲草密度小於2對／7,000立方公分時其寄生數則會降低。

並列摘要

A survey on the hosts of the egg parasitoid, Trichogramma chilonis was conducted at Wangfeng, Taichung in 1982-1983. Six new hosts of the parasitoid were recorded and the rice leaf roller (Cnaphalocrocis medinalis) was the most important one in paddy fields. The percentage of parasitism of natural occurrence averaged 52.9%, and with 72.0% of parasitoids emerged from the parasitized eggs.
The chilonis always showed more active after noon time and majority of them were found in, but not above the rice canopy. Longevity of the female parasitoids averaged 4 days, and sex ratio of female to male in the field was about 2.38 1. Number of host eggs parasitized by two pairs of the parasitoid and the percent of parasitoid emergence showed no difference within the first three days. Percentage of the host egg parasitism in cages would decline when the density of parasitoid was less than 2 pairs per 7×10cm^3.