BIOLOGICAL STUDIES ON COTTON MEALYBUG Phenacoccus solenopsis TINSLEY UNDER LABORATORY CONDITIONS | ||
| Zagazig Journal of Agricultural Research | ||
| Article 11, Volume 46, Issue 2, March and April 2019, Pages 385-389 PDF (304.7 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/zjar.2019.33394 | ||
| Author | ||
| Hassan A. Nabil* | ||
| Plant Prot. Res. Inst., ARC, Dokki, Giza, Egypt | ||
| Abstract | ||
| This study was carried out on cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Sternorrhyncha: Coccoidea : Pseudococcidae) in Scale Insects and Mealybugs Department, Plant Protection Research Institute, Sharkia Branch. It was done during the period extended from July to November 2018 to study periods of the developmental stages of the tested insect under laboratory conditions 25 ± 1˚C, 65 ± 5% RH and a photoperiod 12 hrs., for the possible use of this information in mass rearing and designing prediction and control programs of this pest. Results showed that three nymphal instars were recorded for females with no pupal stage, while only two nymphal instars and a pupal stage were recorded for males. The developmental periods for first, second, third nymphal instars, adult female longevity, life cycle and generation were 6.41, 4.45, 7.09, 28.17, 46.12 and 29.76 days, respectively. The developmental periods for first, second, pupal stage and adult male longevity were 7.10, 8.49, 9.05 and 2.0 days, consecutively. The females showed dynamic patterns of fecundity with the number of crawlers produced per female ranging between 120 and 385, with a mean of 227. | ||
| Keywords | ||
| biological studies; Cotton mealybug | ||
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