15N-marked aphids for predation studies under field conditions |
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| Authors: | K.M. Nienstedt and H.M. Poehling |
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| Affiliation: | (1) Institute of Plant Diseases and Plant Protection, University of Hanover, Herrenhäuser Str. 2, 30419 Hannover, Germany;(2) Present address: Springborn Laboratories (Europe) AG, Seestr. 21, CH-9326 Horn, Switzerland |
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| Abstract: | Individuals ofSitobion avenae (F.) (Homoptera: Aphididae) were marked with the stable isotope 15N through feeding on cereal seedlings which were immersed in a15N-enriched nutrient solution. Increased 15N-contents were obtained in all aphids with no detrimental effect on survival and fertility. When 15N-marked aphids were transferred to non 15N-enriched seedlings, after a short initial decreasing phase, 15N-contents remained nearly constant in time. A content of 10% 15N in the nutrient solution of the seedlings was sufficient for marking the aphids. |
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| Keywords: | 15N marker aphids Sitobion avenae |
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