Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Martti Varama"'
Publikováno v:
Silva Fennica, Vol 57, Iss 3 (2023)
Unequivocal evidence on the antagonistic effects of endophytic fungi associated with woody plants against insect herbivores has been documented in only a few cases so far. Experimental evidence of the significance of needle endophytes to coniferous t
Externí odkaz:
https://doaj.org/article/0109bb465ffe4de29f126d44cf966c8d
Publikováno v:
Silva Fennica, Vol 30, Iss 2-3 (1996)
The European Pine Sawfly (Neodiprion sertifer Geoffroy) is one of the most serious defoliators of Scots pine (Pinus sylvestris L.) in northern Europe. We studied the pattern in the regional occurrence of the outbreaks of N. sertifer in Finland in yea
Externí odkaz:
https://doaj.org/article/e8a36d8b98b9445f851506cf43f59753
Autor:
Gunnar Bröhan, Janik Hundacker, Martti Varama, Christoph Weise, Monika Hilker, Norbert Bittner
Publikováno v:
Plant, Cell & Environment. 45:1033-1048
Known elicitors of plant defenses against eggs of herbivorous insects are low-molecular-weight organic compounds associated with the eggs. However, previous studies provided evidence that also proteinaceous compounds present in secretion associated w
Publikováno v:
Oecologia, 2006 Dec 01. 150(3), 519-527.
Externí odkaz:
https://www.jstor.org/stable/40210605
Autor:
Gunnar Bröhan, Monika Hilker, Janik Hundacker, Christoph Weise, Martti Varama, Norbert Bittner
Known elicitors of plant defenses against eggs of herbivorous insects are low-molecular-weight organic compounds associated with the eggs. However, previous studies provided evidence that also proteinaceous compounds present in secretion associated w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3232d5c35f496f8ecdf36e712985c7f3
https://doi.org/10.22541/au.162796610.03372484/v1
https://doi.org/10.22541/au.162796610.03372484/v1
Publikováno v:
Animal Behaviour. 79:1077-1086
Olfactory orientation by insects may be guided by specific volatile blends released from sites where resources are present. Such blends need to be recognized against the odorous background of the habitat. The egg parasitoid Closterocerus ruforum is k
Autor:
Andrzej Sierpinski, Olle Anderbrant, Gunnar Bergström, Fredrik Östrand, Werner Heitland, Annette Herz, Erik Hedenström, Helene Edlund, Martti Varama, Ann-Britt Wassgren, Marie-Anne Auger-Rozenberg
Publikováno v:
Zeitschrift für Naturforschung C. 64:733-742
3,7-Dimethylpentadecan-2-ol and 3-methylpentadecan-2-ol were identified in female whole body extracts from the two pine sawfly species Gilpinia frutetorum and Gilpinia socia. This is the first observation of 3-methylpentadecan-2-ol in extracts of a f
Autor:
Riitta Julkunen-Tiitto, Karita Saravesi, Martti Varama, Pasi Rautio, Juha Tuomi, Annamari Markkola, Marja Roitto
Publikováno v:
Tree Physiology. 29:207-216
Phenolic compounds often accumulate in foliar tissues of deciduous woody plants in response to previous insect defoliation, but similar responses have been observed infrequently in evergreen conifers. We studied the effects of defoliation on the foli
Publikováno v:
Animal Behaviour. 75:1423-1430
Parasitoids of herbivorous larvae are well known to be able to associatively learn a response to feeding-induced plant volatiles. However, little is known of the abilities of egg parasitoids to learn a response to herbivore oviposition-induced plant
Insect egg deposition induces defence responses inPinus sylvestris: characterisation of the elicitor
Publikováno v:
Journal of Experimental Biology. 208:1849-1854
SUMMARYEgg deposition by the phytophagous sawfly Diprion pini L.(Hymenoptera, Diprionidae) is known to induce locally and systemically the emission of volatiles in Scots pine (Pinus sylvestris L.) that attract the egg parasitoid Chrysonotomyia ruforu