LABORATORY STUDIES ON COCCOPHAGUS SCUTELLARIS (DALMAN) (HYMENOPTERA: APHELINIDAE), PARASITOID OF THE SOFT SCALE INSECT, PULVINARIA TENUIVALVATA (NEWSTEAD), A PEST OF SUGAR CANE IN EGYPT | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 4, Volume 81, Issue 3, September 2003, Page 967-980 PDF (3.13 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2003.281428 | ||||
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| Author | ||||
| SAADIA A. ABDEL-SAMEA | ||||
| Plant Protection Research Institute, Agricultural Research Centre, Giza, Egypt | ||||
| Abstract | ||||
| The aphelinid Coccophagus scutellaris parasitizes the coccid Pulvinatia tenuivalvata, one of the most serious pests of sugar cane. The different stages of the parasitoid were described and illustrated .The mean incubation period of the parasitoid egg was 2.75 days. The mean durations of the larval stages, prepupa and pupa were 16.19, 1.25 and 8.96 days, respectively. This aphelinid species is a primary endoparasitold and attacks the pest throughout its development. It is also shown that C.scuttelaris prefer the second and third nymphal instars to any of the other stages host. Female laid an average of 67 eggs and lived for an average of 13.5 days.The females lived longer than males (7.3 days). The sex ratio of C. scutellaris receded 1:4.6 as males : females. One or more adult parasitoids developed successfully in one host. The maximum number of adult parasitoids emerged from one individual host was ten, depending on stage of the host. Percentage of parasitism was 95% in 2nd instar nymph of P. tenulvalvata. It is concluded that C. scutellaris can be considered as a potential biological control agent for this insect. | ||||
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