Plant Chemistry and Host Range in Insect Herbivores

Ecology ◽  
1988 ◽  
Vol 69 (4) ◽  
pp. 908-909 ◽  
Author(s):  
Paul R. Ehrlich ◽  
Dennis D. Murphy
Keyword(s):  
Host Range ◽  
Insect Herbivores ◽  
Plant Chemistry

Drought Stress in Tomatoes: Changes in Plant Chemistry and Potential Nonlinear Consequences for Insect Herbivores

Oikos ◽  
1997 ◽  
Vol 79 (3) ◽  
pp. 456 ◽  
Author(s):  
Gregory English-Loeb ◽  
Michael J. Stout ◽  
Sean S. Duffey
Keyword(s):  
Drought Stress ◽  
Insect Herbivores ◽  
Plant Chemistry

scholarly journals Improved Understanding of Weed Biological Control Safety and Impact with Chemical Ecology: A Review

2013 ◽  
Vol 6 (1) ◽  
pp. 16-29 ◽  
Author(s):  
Gregory S. Wheeler ◽  
Urs Schaffner
Keyword(s):  
Biological Control ◽  
Host Range ◽  
Chemical Ecology ◽  
Phenotypic Traits ◽  
Management Options ◽  
Plant Chemistry ◽  
Biological Control Of Weeds ◽  
Secondary Chemistry ◽  
Evolutionary Changes ◽  
Secondary Plant

AbstractWe review chemical ecology literature as it relates to biological control of weeds and discuss how this means of controlling invasive plants could be enhanced by the consideration of several well-established research approaches. The interface between chemical ecology and biological control of weeds presents a rich opportunity to exploit potentially coevolved relationships between agents and plants where chemical factors mediating interactions are important. Five topics seem relevant, which if implemented could improve the predictability of host range determination, agent establishment, and impact on the target weed. (1) The host secondary plant chemistry and a potential biological control agent's response to that chemistry can be exploited to improve predictability of potential agent host range. (2) Evolutionary changes may occur in secondary plant chemistry of invasive weeds that have been introduced to novel environments and exposed to a new set of biotic and abiotic stressors. Further, such a scenario facilitates rapid evolutionary changes in phenotypic traits, which in turn may help explain one mechanism of invasiveness and affect the outcome of biological control and other management options. (3) Herbivores can induce production of secondary plant compounds. (4) Variability of weed secondary chemistry which, either constitutive or inducible, can be an important factor that potentially influences the performance of some biological control agents and their impact on the target weed. (5) Finally, sequestration of secondary plant chemistry may protect herbivores against generalist predators, which might improve establishment of a biological control agent introduced to a new range and eventually impact on the target weed. Recognition of these patterns and processes can help identify the factors that impart success to a biological control program.

scholarly journals Varying responses of insect herbivores to altered plant chemistry under organic and conventional treatments

2009 ◽  
Vol 277 (1682) ◽  
pp. 779-786 ◽  
Author(s):  
Joanna T. Staley ◽  
Alex Stewart-Jones ◽  
Tom W. Pope ◽  
Denis J. Wright ◽  
Simon R. Leather ◽  
...  
Keyword(s):  
Insect Herbivores ◽  
Plant Chemistry

Host plant acceptance in a generalist insect: threshold, feedback or choice?

Behaviour ◽  
2020 ◽  
Vol 157 (12-13) ◽  
pp. 1059-1089 ◽  
Author(s):  
Lachlan C. Jones ◽  
Michelle A. Rafter ◽  
Gimme H. Walter
Keyword(s):  
Host Range ◽  
Host Species ◽  
Feedback Loop ◽  
Egg Laying ◽  
Broad Host Range ◽  
Insect Herbivores ◽  
Primary Host ◽  
Measured Time ◽  
Plant Acceptance ◽  
Generalist Insect

Abstract Generalist insect herbivores feed mainly on one or more primary host species, but unlike specialists they also accept numerous secondary hosts. This raises the question of how generalists retain a broad host range yet allocate most of their eggs to primary hosts. We considered three possible explanations. (1) Threshold: secondary hosts are accepted less readily than primary hosts. (2) Feedback loop: insects ovipositing on primary hosts lay subsequent eggs faster than on secondary hosts. (3) Choice: insects compare plant cues sensed over a certain period and oviposit on preferred plants. We measured time and number of landings leading to egg-laying in a generalist moth, Helicoverpa punctigera, on a primary host and two secondary hosts and recorded subsequent egg-laying rates on each. The moths typically accepted only the primary host on the first landing and laid subsequent eggs on this host earlier in the night, indicating thresholds and feedback operate together.

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