Effects of host plant phenolics on spring migration of bird cherry-oat aphid (Rhopalosiphum padi L.)
2011
Czerniewicz, P. | Leszczynski, B. | Chrzanowski, G. | Sempruch, C. | Sytykiewicz, H.
Differences in the quantity and quality of phenolic compounds between the primary and secondary hosts of bird cherry-oat aphid (Rhopalosiphum padi L.) during its spring migration were studied. The aphid population developed on the primary host, the highest concentration of total phenolics was found in the mature leaves of bird cherry (Prunus padus L.) and R. padi migration onto secondary hosts was observed. At the same time the secondary hosts, orchard grass (Dactylis glomerata L.) and winter triticale (x Triticosecale Wittm.) contained over 30% less of the identified total phenolics. However, a more important factor was qualitative difference in the phenols composition among the host plants. In particular, chlorogenic acid, (+)catechin, p-hydroxybenzoic acid and tannic acid occurred in much higher concentration within the bird cherry leaves. Siringic acid, p-coumaric acid and ferulic acid were slightly higher within tissues of the primary host. Other phenolics such as vanilic acid, caffeic acid, sinapic acid, salicylic acid, coumarin and o-coumaric acid were present in higher concentration within secondary hosts. Our results suggest that spring host alternation might be connected with variation in level and composition of the phenolics within host plants of the bird cherry-oat aphid.
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