Publications

Titles

English :

Laboratory evaluation of three Egyptian Heterorhabditid (Heterorhabditidae) and one imported Steinernematid nematodes (Steinernematidae) against mealybugs Planococcus citri (Risso) and Icerya aegyptiaca (Douglas) (Homoptera: Pseudococcidae and Margarodidae

Arabic :

تقييم فعالية أربع أصناف من النيماتودا الممرضة للحشرات ضد نوعين من البق الدقيقي ( بق الموالح الدقيقى و البق الدقيقى المصرى)

Abstract

The infectivity of three Egyptian Heterorhabditid nematode species Heterorhabditis bacteriophora (Poinar) ,Heterorhabditis indica (Poinar) and Heterorhabditis baujardi (Poinar) and one imported Steinernematid species Steinernema abbasi (Elawad) were evaluated against preadult of the citrus mealybug Planococcus citri (Risso) and adult of Egyptian mealybug Icerya aegyptiaca (Douglas) under laboratory conditions. Doses of (100, 500 and 1000) and (100, 200 and 400) infective juveniles (IJs) nematodes were applied to the two mealybugs P. citri and I. aegyptiaca. S. abbasi sp. achieved the highest mortality (76%) against P. citri at dose 1000IJs followed by H. indica, H. bacteriophora and H. baujardi respectively. The differences between the tested species were obvious. The imported S. abbasi was the best in the high dose with P. citri, but at the low dose H. baujardi was the best, while S. abbasi was the worst. For I. aegyptiaca. S. abbasi recorded the lowest infectivity at the dose 100IJs (0%), followed by H. bacteriophora and together with each other scored the lowest infectivity at dose 400IJs (38%). H. indica achieved the highest mortality rate at dose 400IJs (100%) followed by H. baujardi (90 %) which also recorded the highest infectivity at dose 100IJs (70%).

Publication year

2008

Pages

659-668

Organization Name

Plant Protection Research Institute (PPRI)

City

الجيزة

serial title

المجلة المصرية للبحوث الزراعية

ISSN

1110-6336