Difference in Emergence Sequence between Females and Males and the Deposition Strategy of Plodia interpunctella

• Main Authors: Soong,Jim-linn, 宋俊霖
• Other Authors: Peng,Wu-Kang
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/75532766857349893731

碩士 === 國立臺灣大學 === 植物病蟲害學系 === 84 === The Indian meal moth (Plodia interpunctella) larvae were reared on the chicken food with 25% glycerol added in a growth chamber at 30±1℃, 70±5% RH and in a photoperiodism of 12 hr light and 12 hr darkness. The emergence peak, 89.3-95.1%, occurred in the light period, especially during 5-7 hr after the light turned on. When the male and female adults were singly paired immediately after emergemce, 83.3% adults mated within 30 min. after the light turned off. The mating lasted 54±2 min. in average. The female mated on the day she emerged laid 136 eggs in 6 days in average. However, those only mated on second day or on third day after emergence produced 89 and 51 offspring, respectively, with a reduction of 34.6 and 62.5% compared with the normal. The deposition of the female mated with the male at one through seven-day old was not significantly different. All unmated female laid no eggs within the first 5 days after emergence; however,72% of which would deposited 58 eggs thereafter. It was only 37% eggs produced by normally mated female. The rest 28% of unmated female laid no eggs all in their life. The average developmental time of male and female was 27.9 and 27.5 days. When reared at the density of 30, 60, 120, 240, 480 and 960 eggs per jar, on first day of emergence commenced, the probability that the number of female was greater than male was 30, 60, 60, 60, 60 and 40%; on second day, the probability that the accumulative number of female was greater than male was 40, 60, 70, 80, 60and 30%; on third day, the probability was 30, 40, 80, 60, 70 and 50%, respectively. On free-choice test, the female preferred to deposit eggs on silk produced by the larvae rather than chicken food, brown rice, sorghum, raisin, pistachios, silk and almond .