| Titles |
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English :
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Entomopathogentic Nematodes as biocontrol agents for the cotton leafworm, Spodoptera littoralis and the peach fruit fly, Bactrocera zonat
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Arabic :
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النيماتودا الممرضة للحشرات كأحد عناصر المكافحة الحيوية ضد كلا من دودة ورق القطن Spodoptera littoralis وذبابة ثمارالخوخ Bactrocera zonata
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| Abstract |
Pathogenicity of the entomopathogenic nematodes, Steinernema sp. (Steinernematidae) and Heterorhabditis indicus (Heterorhabditidae) was investigated against the cotton leafworm, Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae) and the peach fruit fly, Bactrocera zonata (Saunders) (Diptera: Tephritidae) in the laboratory.
Three concentrations of the nematodes were utilized; 12.5, 25 and 50 infective juveniles (IJs) / cm² of sand surface, in plastic cups, for S. littoralis and 25, 50 and 100 IJs / cm² of sand surface for B. zonata. Percentages of mortality of S. littoralis pupae (1, 2, 3 and 6-day old) by H. indicus were 84.8, 78.7, 60.7 and 40.6 %, respectively, at the concentration of 50 IJs/cm² of sand surface. The respective values for Steinernema sp. were 81.2, 72.0, 51.3 and 40.6 %. Average numbers of IJs produced / infected pupa ranged from 2313 to 5490 in case of H. indicus and from 1534 to 10051 in case of Steinernema sp. Percentages of mortality in moths of S. littoralis emerged from treated pupae (1- 6-day old) at the concentration of 50 IJs/cm² of sand surface reached 100% by H. indicus and ranged from 87.3 to 100% by Steinernema sp. Average numbers of IJs produced / moth ranged between 683 – 28086 in case of H. indicus while no IJs were produced from cadavers of moths infected with Steinernema sp. % Mortality in full-grown larvae of B. zonzta infected with H. indicus were 93.3, 96.4 and 97.8% at the concentrations of 25, 50 and 100 IJs/cm² of sand surface, respectively. The respective figures for Steinernema sp. were 93.3, 100 and 100% .Average numbers of IJs produced / larva ranged 13152– 15750 in case of H. indicus and 1476– 9845 in case of Steinernema sp. Percentages of mortality in pupae (0.0– 4 hrs old) ranged from 80 to 95.2 % by H. indicus and from 86.7 to 100% by Steinernema sp. at the same concentrations (25– 100 IJs / cm² of sand surface).
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| Publication year |
2009
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| Pages |
71-81
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| Organization Name |
Plant Protection Research Institute (PPRI)
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| City |
القاهرة
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| serial title |
مجلة الجمعية المصرية الألمانية لعلم الحيوان
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| ISSN |
1110-5364
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| Author(s) from ARC |
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| Agris Categories |
Pests of plants
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AGROVOC
TERMS |
Bactrocera.
Biological control.
Entomophilic nematodes.
Heterorhabditis.
Spodoptera littoralis.
Steinernema.
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| Publication Type |
Journal
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