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Updated: Nov 20, 2025
06:52
Characterizing Herbivore Resistance Mechanisms: Spittlebugs on Brachiaria spp. as an Example
Published on: June 19, 2011
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Insect species richness affects plant responses to multi-herbivore attack
Maite Fernández de Bobadilla1, Mitchel E Bourne1, Janneke Bloem1
1Laboratory of Entomology, Wageningen University and Research Centre, Droevendaalsesteeg 1, Wageningen, 6708PB, the Netherlands.
The New Phytologist
|January 23, 2021
Summary
Plants attacked by multiple insect herbivores respond differently based on attacker type. Phloem feeders decrease plant defense, while leaf chewers increase it, showing varied plant resistance strategies.
Area of Science:
- Plant-insect interactions
- Chemical ecology
- Ecosystem dynamics
Background:
- Plants face diverse herbivore attacks, impacting their defense mechanisms.
- Understanding plant responses to varied herbivore species richness and feeding guilds is crucial.
Purpose of the Study:
- To investigate how black mustard (Brassica nigra) resistance is affected by increasing species richness of phloem feeders, leaf chewers, or mixed guilds.
- To determine plant responses to subsequent attacks by diamondback moth (Plutella xylostella) caterpillars.
Main Methods:
- Subjecting Brassica nigra to 51 treatments with varying species richness (1, 2, or 4) of phloem feeders, leaf chewers, or a mix.
- Maintaining constant total herbivore density across treatments.
- Assessing plant resistance to subsequent Plutella xylostella (diamondback moth) caterpillar attack.
Main Results:
- Increased richness of phloem-feeding herbivores compromised plant resistance to Plutella xylostella.
- Leaf chewers induced stronger resistance to Plutella xylostella, irrespective of species richness.
- Mixed-guild herbivore attacks resulted in plant resistance levels similar to naive plants.
Conclusions:
- Brassica nigra exhibits feeding-guild specific defense responses under same-guild multi-species attack.
- Plants integrate defense responses when facing mixed-guild herbivores.
- Plant defense strategies vary significantly based on the diversity and type of attacking herbivores.
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