Bracteal exudates in two cirsium species as possible deterrents to insect consumers of seeds [Cirsium discolor, Cirsium flodmani]

Bracteal exudates in two cirsium species as possible deterrents to insect consumers of seeds [Cirsium discolor, Cirsium flodmani]

The involucral bracts of Cirsium discolor (Muhl.) Spreng. and C. flodmani (Rydb.) are sticky. Seed predation by insects on C. discolor was significantly greater in involucres on which the sticky bracteal exudates were experimentally occluded, in central Illinois in 1980. No effect of the experimenta...

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Veröffentlicht in:The American midland naturalist 1983-07, Vol.110 (1), p.212-214
Hauptverfasser: Wilson, M.F, Anderson, P.K, Thomas, P.A
Format: Artikel
Sprache:eng
Schlagworte:
Ants
Bracts
Cirsium discolor
Inflorescences
Insect larvae
Insect traps
Insecta
Larval development
Liquids
Notes and Discussion
Plants
Predators
Seed production
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Zusammenfassung:The involucral bracts of Cirsium discolor (Muhl.) Spreng. and C. flodmani (Rydb.) are sticky. Seed predation by insects on C. discolor was significantly greater in involucres on which the sticky bracteal exudates were experimentally occluded, in central Illinois in 1980. No effect of the experimental treatment was evident for C. flodmani in northwestern Minnesota in 1980 or 1982.
ISSN:0003-0031
1938-4238
DOI:10.2307/2425228