Feeding Deterrency of Some 4-hydroxycoumarins and Related Compounds: Relationship to Host-plant Resistance of Alfalfa Towards Pea Aphid (Acyrthosiphon Pisum)
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Environmental Health
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A series of 3-acyl-4-hydroxycoumarins, structurally related to dicoumarol, as well as several alfalfa constituents including coumestrol were tested for their feeding deterrency towards the pea aphid. Feeding deterrency of the 3-acyl-4-hydroxycoumarins decreased as the size of the 3-acyl group increased.
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