PACHYCREPOIDELIS VINDEMMIAE (RONDAN1), A NEW RECORD PARASITOID (HYMENOPTERA, PTEROMALIDAE) ON PUPAE OF THE BEET LEAFMIN ER, PEGOMYA MIXTA VILLENEUVE (DIPTERA: ANTHOMYIIDAE), AND THE BEET MOTH, SCROBIPALPA OCELLATELLA (BOYD)( LEPIDOPTERA GELECHIIDAE ) | ||
| Egyptian Journal of Agricultural Research | ||
| Article 4, Volume 86, Issue 1, March 2008, Pages 43-63 PDF (4.5 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2008.202448 | ||
| Author | ||
| SAMER A. EL-SERWY | ||
| Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt | ||
| Abstract | ||
| Pachycrepoldeus vindemmiae (Rork:Ian') (Diptera: Anthomyiidae), is a new parasitoid recorded on the pupae of the beet ieafminer, Pegamya !nada in the Governorates of Giza, Kafr Et-Sheikh (at Oria) and Dakqhliya (at El-Simbalwein and Beigas) and with the beet moth, Scrobipalpa ocellatella in Kafr El-Sheikh (at Saktia) and in Dakatillya (at Shirbin). It is a solitary pupal parasitoid, rarely polyparasitism was found. Intraspecific variations in P. vindemmiae parasitism were 16.7% and 12.6% apposed to 4,3% and 2.6% on parasitized pupae of the beet fly and moth an sugar beet at Sakha and Shirbin, respectively. Interspecific activities by P. videmmiae and Crius Medulater (Nees) (Chacidoidae: Braconidae) resulted in overall means 15.5% and 23.6% representing efficacies about 40% and 60% as biological control agents against we beet fly. On parasitized sugar beet pupae, parasitism by P. vindemmiae increased 1.7% and, 26.4% at ( Saktia & El-Simbalwein) In 2084-2005, and 32.2% & 30.0% in (2004-2005 and 2005- 2006 ) at Giza but decreased 24.4%,15.3% and 5% at ( Bile, Beigas and Shirbin ) in 2005- 2006 than 0. niticlulator. Efficacies of A vindemmiae increasing about 5% & 71% and 45% & 43% versus about 96%, 75% and 17% by 0. evaded:71w as biological control agents against the beet fly. Intraspecific variations in P vindemmiae parasitism resulted in descending means 50.4%, 25.2%, 16.7% and 3.5% on parasitized pupae reared from sugar beet, goosefoot, spinach and chard at Giza. Generally, parasitic activity by 0. nitic/u/ator started on mid November and continued until lath April, However, P. vindemmiae appeared in two cyclic activity periods from the third week of November to late January and from mid March to late May. The interspecific competition resulted in overall means of 3.1% and 47.5% by the pterornalin species versus 27.8% and 11.4% by the braconid species is the two cyclic activity periods. The activity by uncompetitive 0. atidarator suffered overall means 18.6% and 45.6% during the same periods. Interspecific competition activities between the two parasitoid species and intraspecific by 0. niticklatpr resulted in an increase about 36% and 34% in parasitism than these recorded by the competitive braconid species. Increasing parasitism by P. vindemmiae probably replaced by 0. nifidulator or acts as hyperparasitoid on its parasitized pupae. It is a generalist pupa! parasitoid resulted In overall means 4.3% and 15.5% on the beet moth and fly pupae. It did not previously recorded on lepidopterous pupae, it obligate to parasitize on the beet moth pupae as alternative host when the beet fly pupae were scarce at the end of sugar beet growing season. Wasps emerged from the third week of December to mid September and from late April to early October and about 49% | ||
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