DESCRIPTION OF THE DIFFERENT STAGES IN THE LIFE CYCLE OF THE DATE PALM SCALE INSECT, Parlatoria blanchardi TARGIONI TOZZETTI (Homoptera, Diaspididae) | ||
| Fayoum Journal of Agricultural Research and Development | ||
| Article 7, Volume 22, Issue 2, July 2008, Pages 115-119 PDF (376.65 K) | ||
| Document Type: Research articles. | ||
| DOI: 10.21608/fjard.2008.197489 | ||
| Author | ||
| R.Y. Abdel Aleem | ||
| Department of Economic Entomology & pesticides Fac. Of Agrec., Cairo Univ., Giza, Egypt. | ||
| Abstract | ||
| The different stages of P. blanchardi were described. The egg is oblong, whitish yellow and averages 285 microns long and 110 microns wide. After hatching, the 1st instar, crawler that gets out from beneath the scale is also oblong yellowish white in color and measures 250 microns long and 125 microns wide. The female passes through two nymphal instars, while the male passes through four. For this reason, the main taxonomic characters of the different nymphal instars in both sexes were studied in details. In the adult stage, sex is clearly distinguished. The female becomes semicircular, elongated, and apterous, while the male is elongated and winged. P. blancgardi, like most insects of this group, protect itself with an armoured scale composed of exuviae and other secreted materials. After the last nymphal moult, the male usually emerges from beneath the scale, while the female remains motionless. | ||
| Keywords | ||
| Scale insect; Date palm; Description; Homoptera; Diaspididae | ||
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