BIOLOGY OF A PREDATORY COCCINELLID COCCINELLA SEPTUMPUNCTATA LINN. (COLEOPTERA: COCCINELLIDAE)
Pushpendra K. Sharma* and P. C. Joshi
*Department of Zoology, D.A.V. (P.G.) College, Dehradun-248001 (U.K.), India
Department of Zoology and Env. Sci., Gurukul Kangri University, Hardwar (U.K.), India
A predatory coccinellid beetle Coccinella septumpunctata Linnaeus was reared in the laboratory at temperatures 25 ± 20 C, relative humidity 60 ±5% and photoperiod 12L: 12D on aphid species Lipaphis erysimi and thereafter biological tables were constructed. During the study period, it was observed that the eggs of C. septumpunctata are elongated or cylindrical and laid in clusters. The eggs are yellowish when freshly laid. The observed incubation period varies from 3.2 – 3.5 days. Larval development study has also been done with rearing of larvae in Ist instar to imagoes after passing through 5 instars and on an average taking 12 to 15 days from larval to pupal stage and 3-5 days from pupa to emergence. First larval instars faced maximum mortality in the immature stages.
Keywords: Coccinellid beetle, temperature, aphid, egg, larva, pupa