Glucosinolate induction by parasitized caterpillars

Herbivore feeding damage induces increased production of chemical defenses in many plants and the amount of induction is often correlated with the amount of feeding damage. Many parasitoids are thought to increase plant fitness by decreasing herbivore feeding in the near term or reducing herbivore populations in the long term, making defenses which negatively impact parasitoids typically disadvantageous for the plant. Solitary parasitoids (where only one individual completes development per host) generally cause their hosts to feed less than unparasitized herbivores. However, gregarious parasitoids (where more than one individual develops per host) can decrease plant fitness if parasitized herbivores feed more than unparasitized herbivores, which should then also induce greater defense chemistry. Yet, it is unclear whether differential induction effects are primarily due to differences in feeding amount or parasitoid identity.
We explored the relationship between plant defense induction..., , , # Glucosinolate induction by parasitized caterpillars

[https://doi.org/10.5061/dryad.1vhhmgr4q](https://doi.org/10.5061/dryad.1vhhmgr4q)

## Description of the data and file structure

Data on caterpillar fitness, plant damage, and glucosinolate content for plants fed on by caterpillars parasitized by different parasitoid wasps. Plants were fed on by caterpillars for three days with leaves being analyzed for glucosinolate content before and after feeding damage. Leaf content was analyzed with HPLC-PDA and leaf damage was quantified using ImageJ to measure area.

### Files and variables

#### File: induction\_full\_data\_csv\_dryad.csv

**Description:** Caterpillar fitness data and glucosinolate content of plants after feeding by parasitized and unparasitized caterpillars (primary experiment in manuscript); missing/blank data indicated by \"NA\"

##### Variables

* Treatment: Cr4 (Cotesia rubecula-parasitized 4th instar), Cg4 (Cotesia glomerata-parasitized 4th instar), Cg5 (C. glomerata-p...,