Analyses of two parasitoids with convergent foraging strategies

Consuelo M De Moraes, W. J. Lewis

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We compared the foraging strategies of two key braconid endoparasitoids of the tobacco budworm (Heliothis virescens Fab.), Cardiochiles nigriceps Vier. and Microplitis croceipes Cresson, that differ in host and habitat range but otherwise share comparable, overlapping niches. The most important host-location cues by far for both species were materials associated with damaged plants. Both species demonstrated a significant preference for volatiles released from plants damaged by H. virescens larvae over those released from undamaged tobacco and cotton plants. In choice experiments with damaged tobacco versus cotton, M. croceipes showed a significant preference for cotton plants. In contrast, C. nigriceps preferred damaged tobacco plants. Plant compounds provoked a strong response even when released from systemically induced plants (from which damaged leaves, host, and host by-products were removed). C. nigriceps appears to have a much keener ability to locate hosts over long distances than M. croceipes. This observation may be related to the highly specialized nature of this parasitoid. The possible adaptive significance of the foraging behaviors of these two parasitoids is discussed.

Original languageEnglish (US)
Pages (from-to)571-583
Number of pages13
JournalJournal of Insect Behavior
Volume12
Issue number5
DOIs
StatePublished - Jan 1 1999

Fingerprint

parasitoids
foraging
Cardiochiles nigriceps
Microplitis croceipes
tobacco
Heliothis virescens
cotton
endoparasitoids
host location
foraging behavior
parasitoid
byproducts
niche
niches
larva
larvae
habitat
habitats
leaves
experiment

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Insect Science

Cite this

De Moraes, Consuelo M ; Lewis, W. J. / Analyses of two parasitoids with convergent foraging strategies. In: Journal of Insect Behavior. 1999 ; Vol. 12, No. 5. pp. 571-583.
@article{e1602bd7da0a40d981f011920898e71c,
title = "Analyses of two parasitoids with convergent foraging strategies",
abstract = "We compared the foraging strategies of two key braconid endoparasitoids of the tobacco budworm (Heliothis virescens Fab.), Cardiochiles nigriceps Vier. and Microplitis croceipes Cresson, that differ in host and habitat range but otherwise share comparable, overlapping niches. The most important host-location cues by far for both species were materials associated with damaged plants. Both species demonstrated a significant preference for volatiles released from plants damaged by H. virescens larvae over those released from undamaged tobacco and cotton plants. In choice experiments with damaged tobacco versus cotton, M. croceipes showed a significant preference for cotton plants. In contrast, C. nigriceps preferred damaged tobacco plants. Plant compounds provoked a strong response even when released from systemically induced plants (from which damaged leaves, host, and host by-products were removed). C. nigriceps appears to have a much keener ability to locate hosts over long distances than M. croceipes. This observation may be related to the highly specialized nature of this parasitoid. The possible adaptive significance of the foraging behaviors of these two parasitoids is discussed.",
author = "{De Moraes}, {Consuelo M} and Lewis, {W. J.}",
year = "1999",
month = "1",
day = "1",
doi = "10.1023/A:1020967417801",
language = "English (US)",
volume = "12",
pages = "571--583",
journal = "Journal of Insect Behavior",
issn = "0892-7553",
publisher = "Springer New York",
number = "5",

}

Analyses of two parasitoids with convergent foraging strategies. / De Moraes, Consuelo M; Lewis, W. J.

In: Journal of Insect Behavior, Vol. 12, No. 5, 01.01.1999, p. 571-583.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Analyses of two parasitoids with convergent foraging strategies

AU - De Moraes, Consuelo M

AU - Lewis, W. J.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - We compared the foraging strategies of two key braconid endoparasitoids of the tobacco budworm (Heliothis virescens Fab.), Cardiochiles nigriceps Vier. and Microplitis croceipes Cresson, that differ in host and habitat range but otherwise share comparable, overlapping niches. The most important host-location cues by far for both species were materials associated with damaged plants. Both species demonstrated a significant preference for volatiles released from plants damaged by H. virescens larvae over those released from undamaged tobacco and cotton plants. In choice experiments with damaged tobacco versus cotton, M. croceipes showed a significant preference for cotton plants. In contrast, C. nigriceps preferred damaged tobacco plants. Plant compounds provoked a strong response even when released from systemically induced plants (from which damaged leaves, host, and host by-products were removed). C. nigriceps appears to have a much keener ability to locate hosts over long distances than M. croceipes. This observation may be related to the highly specialized nature of this parasitoid. The possible adaptive significance of the foraging behaviors of these two parasitoids is discussed.

AB - We compared the foraging strategies of two key braconid endoparasitoids of the tobacco budworm (Heliothis virescens Fab.), Cardiochiles nigriceps Vier. and Microplitis croceipes Cresson, that differ in host and habitat range but otherwise share comparable, overlapping niches. The most important host-location cues by far for both species were materials associated with damaged plants. Both species demonstrated a significant preference for volatiles released from plants damaged by H. virescens larvae over those released from undamaged tobacco and cotton plants. In choice experiments with damaged tobacco versus cotton, M. croceipes showed a significant preference for cotton plants. In contrast, C. nigriceps preferred damaged tobacco plants. Plant compounds provoked a strong response even when released from systemically induced plants (from which damaged leaves, host, and host by-products were removed). C. nigriceps appears to have a much keener ability to locate hosts over long distances than M. croceipes. This observation may be related to the highly specialized nature of this parasitoid. The possible adaptive significance of the foraging behaviors of these two parasitoids is discussed.

UR - http://www.scopus.com/inward/record.url?scp=0033504910&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033504910&partnerID=8YFLogxK

U2 - 10.1023/A:1020967417801

DO - 10.1023/A:1020967417801

M3 - Article

VL - 12

SP - 571

EP - 583

JO - Journal of Insect Behavior

JF - Journal of Insect Behavior

SN - 0892-7553

IS - 5

ER -