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OIKOS 89: 7080. Copenhagen 2000 How leaf domatia and induced plant resistance affect herbivores,
 

Summary: OIKOS 89: 7080. Copenhagen 2000
How leaf domatia and induced plant resistance affect herbivores,
natural enemies and plant performance
Anurag A. Agrawal, Richard Karban and Ramana G. Colfer
Agrawal, A. A., Karban, R. and Colfer, R. G. 2000. How leaf domatia and induced
plant resistance affect herbivores, natural enemies and plant performance. Oikos
89: 7080.
Predators and plant resistance may act together to control herbivorous arthropod
populations or antagonistically, which would reduce the control of pest populations.
In a field experiment we enhanced predation by adding simulated leaf domatia to
plants. Leaf domatia are small structures that often harbor predaceous arthropods
that are potentially beneficial to the plant. We also manipulated host plant quality by
inducing resistance with controlled, early season exposure of seedlings to spider mite
herbivory.
Our manipulations had profound consequences for the natural community of
arthropods that inhabited the plants. Leaf domatia had a direct positive effect on
abundances of two species of bugs and one species of thrips, all of which are largely
predators of herbivores. On leaves with domatia, each of the predators was found
inside the domatia two to three times more often than outside the domatia. Eggs of
predaceous bugs inside leaf domatia were protected from parasitism compared to

  

Source: Agrawal, Anurag - Department of Ecology and Evolutionary Biology & Entomollogy, Cornell University

 

Collections: Environmental Sciences and Ecology