Male accessory gland substance of Spodoptera littoralis (Boisd): a stimulant of egg-laying in virgin females in relation male age | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 1, Issue 1, 1987, Pages 1-13 PDF (855.88 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.1987.461661 | ||
| Authors | ||
| M. Hashem* ; A. S. Ibrahim; N. Mansour | ||
| Department of Plant Protection, Faculty of Agriculture, University of Alexandria, Egypt | ||
| Abstract | ||
| Male substances were extracted from the whole male reproductive system (MRS), male accessory gland (MAG) end male reproductive system free from accessory gland (AG free—MRS) of different aged S. littoralis adults. The amount of each male substance extract increased with the Increase in the ace of the male. AG extracts were the most stimulatory in egg lying induction by newly emerged (NE) virgin moths were responded to the injection of different concentrations. The higher the amount of injected MRS and AQ free -MRS extracts the higher the percentage of the ovipositing • females. the other hand, results showed that the younger the male, from which the extract wag obtained, the higher the percentage of ovipositing females. The majority of male stimulatory factor(s) seems to be concentrated int' the MAG. The stimulating activity was found to be concentration—dependent. All male substance extracts of NE males stimulated egg-laying, in NE/ females, more than those of older males. The extracts obtained from younger males were more potent. | ||
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