Antennal olfactory responses of black turpentine beetle,Dendroctonus terebrans (Olivier), to bark beetle pheromones and host terpenes

1990 ◽  
Vol 16 (4) ◽  
pp. 1321-1329 ◽  
Author(s):  
J. D. Delorme ◽  
T. L. Payne
Keyword(s):  
Bark Beetle ◽  
Olfactory Responses ◽  
Dendroctonus Terebrans

scholarly journals Interactions among Norway spruce, the bark beetle Ips typographus and its fungal symbionts in times of drought

2021 ◽  
Author(s):  
Sigrid Netherer ◽  
Dineshkumar Kandasamy ◽  
Anna Jirosová ◽  
Blanka Kalinová ◽  
Martin Schebeck ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Physiological Stress ◽  
Current Knowledge ◽  
Ips Typographus ◽  
Future Research ◽  
Emission Rates ◽  
Olfactory Responses ◽  
Effects Of Drought

AbstractResilience and functionality of European Norway spruce forests are increasingly threatened by mass outbreaks of the bark beetle Ips typographus promoted by heat, wind throw and drought. Here, we review current knowledge on Norway spruce and I. typographus interactions from the perspective of drought-stressed trees, host selection, colonisation behaviour of beetles, with multi-level effects of symbiotic ophiostomatoid fungi. By including chemo-ecological, molecular and behavioural perspectives, we provide a comprehensive picture on this complex, multitrophic system in the light of climate change. Trees invest carbon into specialised metabolism to produce defence compounds against biotic invaders; processes that are strongly affected by physiological stress such as drought. Spruce bark contains numerous terpenoid and phenolic substances, which are important for bark beetle aggregation and attack success. Abiotic stressors such as increased temperatures and drought affect composition, amounts and emission rates of volatile compounds. Thus, drought events may influence olfactory responses of I. typographus, and further the pheromone communication enabling mass attack. In addition, I. typographus is associated with numerous ophiostomatoid fungal symbionts with multiple effects on beetle life history. Symbiotic fungi degrade spruce toxins, help to exhaust tree defences, produce beetle semiochemicals, and possibly provide nutrition. As the various fungal associates have different temperature optima, they can influence the performance of I. typographus differently under changing environmental conditions. Finally, we discuss why effects of drought on tree-killing by bark beetles are still poorly understood and provide an outlook on future research on this eruptive species using both, field and laboratory experiments.

Olfactory responses and feeding preferences of Copitarsia uncilata (Lepidoptera: Noctuidae) to four aromatic herb specie

2017 ◽  
Vol 43 (2) ◽  
pp. 179
Author(s):  
Miguel Mendieta ◽  
Andreas Gaigl ◽  
Juan Carlos Getiva de la Hoz ◽  
Anibal Orlando Herrera
Keyword(s):  
Host Plant ◽  
Feeding Preferences ◽  
Larval Weight ◽  
Olfactory Responses ◽  
Host Selection Behavior ◽  
Selection Behavior ◽  
Larva Feeding ◽  
Plant Choice ◽  
Lepidoptera Noctuidae ◽  
Aromatic Herbs

Colombian aromatic herbs have great potential as an export commodity. The genus Copitarsia is considered as an economic and a quarantine pest attacking them. In herbivore insects, host plant choice is made by adults and influenced by host plant quality. There were performed olfactory and feeding tests by using four-arm olfactometer and offering four different aromatic herbs (basil, mint, rosemary, or thyme) to determine the host selection behavior of Copitarsia uncilata Burgos and Leiva. Parameters, such as adult choice, larval weight, and time spent by larva on particular herb were measured. The preferences of adults and immature of C. uncilata varied significantly among the herbs in olfactory and larva feeding tests. The adults showed significantly higher responses to essential oils of basil and rosemary. Higher weight of larva was recorded on mint and basil. Further studies on larval development and longevity of adults on different herbs are necessary.

Conifer snagfall data in bark-beetle infested subalpine forests at the Fraser Experimental Forest, Colorado, USA

2019 ◽  
Author(s):  
Charles C. Rhoades ◽  
Robert M. Hubbard ◽  
Paul R. Hood ◽  
Banning J. Starr ◽  
Daniel B. Tinker ◽  
...  
Keyword(s):  
Bark Beetle ◽  
Subalpine Forests
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