Influence of honey and maternal age on egg load of lab-cultured <Emphasis Type="Italic">Cotesia marginiventris</Emphasis> |
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Authors: | E W Riddick |
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Institution: | (1) USDA-Agricultural Research Service, Biological Control of Pests Research Unit, 59 Lee Road, Stoneville, MS 38776, USA |
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Abstract: | Laboratory experiments were conducted to determine the impact of feeding status and maternal age on egg load of Cotesia
marginiventris (Cresson) (Hymenoptera: Braconidae), a solitary, koinobiont endoparasitoid of noctuid pests. Egg load was defined as the
number of mature (i.e., fully-chorionated) eggs found in the ovaries and oviducts. Significantly more mature eggs were stored
in honey-fed than starved females. For honey-fed females, egg load increased within several days of isolation from hosts.
This study suggests that C. marginiventris is weakly synovigenic because females emerge with a considerable number of mature eggs and are capable of maturing many more
eggs. Feeding on a suitable source of carbohydrate should increase the egg load (i.e., potential fecundity) of this insect
within 3–4 days in an in vivo rearing system. |
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Keywords: | Beet armyworm Biological control Egg load Endoparasitoid Rearing |
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