15N-marked aphids for predation studies under field conditions
2000
Nienstedt, K.M. | Poehling, H.M.
Individuals of Sitobion avenae (F.) (Homoptera: Aphididae) were marked with the stable isotope 15N through feeding on cereal seedlings which were immersed in a 15N-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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