caa a22 4500 47708320X CHVBK 20180405111455.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF01920719 doi (NATIONALLICENCE)springer-10.1007/BF01920719 Cyclohexadienones-insect growth inhibitors from the foliar surface and tissue extracts of Senecio cannabifolius [Elektronische Daten] [L. Lajide, P. Escoubas, J. Mizutani] Dewaxed leaf surface extracts of 12 plants from Hokkaido, prepared by dipping fresh leaves in chloroform for 3 min, were used in a choice leaf-disk bioassay against larvae of the tobacco cutwormSpodoptera litura. Activity was found only in the extract ofSenecio cannabifolius, a very successful weed in Hokkaido. Individual fractions of the extract, however, were not active. Incorporation of the individual fractions of the surface extracts as well as fractions of the methanolic extracts of the leaf residue into an artificial diet fed to neonateS. litura led to the isolation of ethyl (1-hydroxy-4-oxocyclohexa-2,5-dien-1-yl) acetate, the major surface compound, as the active principle. This compound was also present in the methanolic extract of the leaf residue together with methyl (1-hydroxy-4-oxocyclohexa-2,5-dien-1-yl) acetate, which had the same growth inhibitory effect on the larvae. The presence of these compounds in the foliar surface and tissue suggests a defensive role against herbivores. Birkhäuser Verlag, 1996 Senecio cannabifolius nationallicence Compositae nationallicence foliar surface chemistry nationallicence tobacco cutworm nationallicence Spodoptera litura nationallicence Lepidoptera nationallicence Noctuidae growth inhibition nationallicence ethyl (1-hydroxy-4-oxocyclohexa-2,5-dien-1-yl) acetate nationallicence methyl (1-hydroxy-4-oxocyclohexa-2,5-dien-1-yl) acetate nationallicence Lajide L. Plant Ecochemicals Project, Research Development Corporation of Japan (JRDC), Eniwa RBP, Megumino Kita 3-1-1, 061-13, Eniwa-Shi, Hokkaido, Japan aut Escoubas P. Plant Ecochemicals Project, Research Development Corporation of Japan (JRDC), Eniwa RBP, Megumino Kita 3-1-1, 061-13, Eniwa-Shi, Hokkaido, Japan aut Mizutani J. Plant Ecochemicals Project, Research Development Corporation of Japan (JRDC), Eniwa RBP, Megumino Kita 3-1-1, 061-13, Eniwa-Shi, Hokkaido, Japan aut Experientia Birkhäuser-Verlag 52/3(1996-03-01), 259-263 0014-4754 52:3<259 1996 52 18 https://doi.org/10.1007/BF01920719 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01920719 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lajide L. Plant Ecochemicals Project, Research Development Corporation of Japan (JRDC), Eniwa RBP, Megumino Kita 3-1-1, 061-13, Eniwa-Shi, Hokkaido, Japan aut NATIONALLICENCE 700 1- Escoubas P. Plant Ecochemicals Project, Research Development Corporation of Japan (JRDC), Eniwa RBP, Megumino Kita 3-1-1, 061-13, Eniwa-Shi, Hokkaido, Japan aut NATIONALLICENCE 700 1- Mizutani J. Plant Ecochemicals Project, Research Development Corporation of Japan (JRDC), Eniwa RBP, Megumino Kita 3-1-1, 061-13, Eniwa-Shi, Hokkaido, Japan aut NATIONALLICENCE 773 0- Experientia Birkhäuser-Verlag 52/3(1996-03-01), 259-263 0014-4754 52:3<259 1996 52 18 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer