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Field studies on insect and animal pests attacking alfalfa (Medicago Sativa l.) and their natural enemies in five governorates in Egypt [electronic resource].

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Hady, S. A

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Language: English Summary language: Arabic Description: p.1227-1242Other title:

دراسات حقلية على الآفات الحشرية والحيوانية التي تهاجم البرسيم الحجازي والأعداء الطبيعية المصاحبة لها في خمس محافظات مصر العربية [Added title page title]

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Annals of agricultural science, Moshtohor, 2007 v.45 (3) [electronic resource].

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In: Annals of Agricultural Science, Moshtohor 2007.v.45 (3)Summary: Results indicated that alfalfa plants harbored 22, 27 and 9 species, of destructive, beneficial and visitor insects respectively, belonging to13, 15 and 9 familiesand6, 8 and 5 orders respectively. Thepopulationdensitiesof speciesin crop had an effective insect pests, (Homoptera : Aphididae) represented as Aphids (different species) 26.3 %, leafhopper (Iassid's)(Homoptera : Cicadilidae) 26.2 %and clover leaf minerfly (Diptera : Agromyzidae) 24.6 0/0, beneficial animal and insects represented as aphid lion (Neuroptera : Chrysopidae) 19.30/0, true spider (different species) (Araneida : Non-identified) 15.6 % and, lady bird beetles, (Coleoptera : Coccinellidae) by Coccine//ae spp. 15.3 % and visitor insects (Diptera : Culicidae) represented as Culex spp. 57.8 %.Each Insect population was represented by percentage of total numbers of insect pests, beneficial and visitor species, respectively.It could be stated that crop has dominant andsubdominant species. The most harmful insects;beneficialanimal andinsectsandvisitor denisitiesconcentrated in Siwa& ParisOasis and in IsmailiaAgriculture ExperimentalResearch stations.

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Results indicated that alfalfa plants harbored 22, 27 and 9 species, of destructive, beneficial and visitor insects respectively, belonging to13, 15 and 9 familiesand6, 8 and 5 orders respectively. Thepopulationdensitiesof speciesin crop had an effective insect pests, (Homoptera : Aphididae) represented as Aphids (different species) 26.3 %, leafhopper (Iassid's)(Homoptera : Cicadilidae) 26.2 %and clover leaf minerfly (Diptera : Agromyzidae) 24.6 0/0, beneficial animal and insects represented as aphid lion (Neuroptera : Chrysopidae) 19.30/0, true spider (different species) (Araneida : Non-identified) 15.6 % and, lady bird beetles, (Coleoptera : Coccinellidae) by Coccine//ae spp. 15.3 % and visitor insects (Diptera : Culicidae) represented as Culex spp. 57.8 %.Each Insect population was represented by percentage of total numbers of insect pests, beneficial and visitor species, respectively.It could be stated that crop has dominant andsubdominant species. The most harmful insects;beneficialanimal andinsectsandvisitor denisitiesconcentrated in Siwa& ParisOasis and in IsmailiaAgriculture ExperimentalResearch stations.

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