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The influence of common plant polyamines on feeding behaviour and survival of grain aphid (Sitobion avenae F., Hemiptera: Aphididae) has been studied. Laboratory tests showed that wingless females of S. avenae assimilated higher quantities of food from triticale seedlings placed in 0.01% solutions of agmatine and cadaverine, and lower in case of spermidine and spermine. Increase in the polyamines...
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