Biology, Rearing and Potential of chelonus, an Egg-Larval Parasitoid of Pink Bollworm

M. G. Hentz, S.E. Naranjo, P.C. Ellsworth, and J. Martin


The development of Chelonus sp. nr. curvimaculatus was studied at 29øC ± 1øC in a pink bollworm host. At 4 hrs. old, the egg had a length and width of 0.1810 mm and 0.0412 mm respectively. The first stadium averaged 12 days, and the first instar larvae ranged in length from 0.1654 mm (neonate) to 0.6185 mm (8 days old). The second stadium averaged 2 days, and the second instar larvae had an average length of 2.11 mm. The third stadium averaged 3 days, and the third instar larvae had an average length of 4.65 mm. The pupal stage lasted 6-7 days. Adult male and female wasps had average lengths of 2.91 mm and 2.97 mm, respectively. Longevity for males was 7.44 days and 8.00 days for females. The life cycle from egg to adult averaged about 23 days.

Reprinted from Proceedings of the 1994 Beltwide Cotton Conferences pp. 1244 - 1245
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998