Publications

Titles

English :

Interaction Between Beauveria bassiana (Balsamo) and Metahrizium anisopliae (Metsch.) and the Host /Parasitoid System Aphis craccivora (Koch) / Aphidius colemani (Viereck.)

Arabic :

التداخل بين فطرى Beauveria bassiana و Metahrizium anisopliae و العائل الحشرى من اللوبيا Aphis craccivora وطفيله الداخلى Aphidius colemani

Abstract

Laboratory experiments were conducted to evaluate the virulence of two entomopathogenic fungi, Beauveria bassiana (Balsamo) and Metahrizium anisopliae (Metsch.) against the cowpea aphid, Aphis craccivora (Koch). The relationships between the solitary endoparasitoid Aphidus colemani (Viereck.) in the cowpea aphid, infected with the same entomopathogenic fungi was also considered. The mortality percentages in A. craccivora treated with B. bassiana and M. anisopliae were increased by increasing the concentrations of fungal conidia and time elapsed after treatment. The LC50 of B. bassiana and M. anisopliae for A. craccivora were estimated to be 2.94x107 conidia/ ml and 1.8x107 conidia/ ml at three days post treatment and 2.06x106 conidia/ ml and 1.92x106 conidia/ ml at eight days post treatment, respectively. Releasing A. colemani on fungus-treated seedlings infested with A. craccivora resulted in reduction of parasitism percentages with B. bassiana and M. anisopliae, where it recorded an average 91.9% and 93.5% in control pots and it ranged from 85.4 to 53.1% and from 86.6 to 54.9% with the increase of the concentration of the fungus from 1x106 - 1x1012 conidia/ ml, respectively. It was found that, B. bassiana and M. anisopliae reduced emergence percentage of A. colemani from the mummies at concentrations of 1x108 - 1x1012. While the two concentrations 1x106 and 1x107 were found to have little effect.

Publication year

2010

Pages

1-10

Organization Name

Plant Protection Research Institute (PPRI)

serial title

مجلة الجمعية المصرية – الألمانية لعلم الحيوان

ISSN

1110-5364

Author(s) from ARC

Hassan Mohamed El-Saadany