ISSN:
1423-0445
Keywords:
larval frass
;
predator
;
prey
;
biological control
;
kairomones
;
Rhizophagus grandis
;
Dendroctonus micans
;
Coleoptera
;
Rhizophagidae
;
Scolytidae
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Adults of the predatory beetleRhizophagus grandis are strongly attracted to both adult and larval frass of its specific prey,Dendroctonus micans, in walking bioassays. Spruce bark and resin are relatively unattractive. Solvent extracts of larval frass that were attractive toR. grandis adults in a flight wind tunnel contained a mixture of monoterpenes of host plant origin. A synthetic mixture of these monoterpenes, (+)—α-pinene, (−)—β-pinene, β-phellandrene,dl limonene and 3-carene, was responsible for 70–80% of the activity of the most attractive extract. We suggest that a blend of monoterpenes in frass acts as a kairomone forR. grandis but that attraction to monoterpenes is only the first of a sequence of behavioural responses that ensures successful host location and identification.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01240667
Permalink