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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

Journal Article

مقال مجلة

Biology, ecology, and host specificity of European Aphthona spp. (Coleoptera, Chrysomelidae) used as biocontrol agents for leafy spurge, Euphorbia esula (Euphorbiaceae), in North America  [1996]

Gassmann, A. (International Institute of Biological Control, Delemont, Switzerland.); Schroeder, D.; Maw, E.; Summer, G.;

استعراض النص الكامل

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Leafy spurge (Euphorbia esula) is an herbaceous perennial of European origin that was accidentally introduced into North America where it has become a serious weed in pastures and rangelands. Five species of root-feeding chrysomelid beetles in the genus Aphthona have been released in North America for the biological control of leafy spurge. They originate from central and eastern Europe and occur in different habitats. The brown species, Aphthona cyparissiae, Aphthona flava, and Aphthona nigriscutis, occur predominantly in open dry habitats, and the black species, Aphthona czwalinai and Aphthona lacertosa, prefer moister habitats. All five species are univoltine and overwinter as larvae. The host range of these five Aphthona species is restricted to species in the subgenus Esula
المجلة
Biological control : theory and applications in pest management (USA)
الرقم التسلسلي المعياري الدولي (ردمد) : 1049-9644

معلومات ببليوغرافية

اللغة:
English
النوع:
Journal Article
في أجريس منذ:
1998
المجلد:
6
الإصدار:
1
صفحة البداية:
105
صفحة النهاية:
113
جميع العناوين:
"Biology, ecology, and host specificity of European Aphthona spp. (Coleoptera, Chrysomelidae) used as biocontrol agents for leafy spurge, Euphorbia esula (Euphorbiaceae), in North America"@eng
مسائل أخرى:
"references"
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معلومات ببليوغرافية

اللغة:
English
النوع:
Journal Article
في أجريس منذ:
1998
المجلد:
6
الإصدار:
1
صفحة البداية:
105
صفحة النهاية:
113
جميع العناوين:
"Biology, ecology, and host specificity of European Aphthona spp. (Coleoptera, Chrysomelidae) used as biocontrol agents for leafy spurge, Euphorbia esula (Euphorbiaceae), in North America"@eng
مسائل أخرى:
"references"