Effects of nonspecific adaptive defense by pests on efficiency of biological control by multiple natural enemies

Yusuke Ikegawa, Hideo Ezoe, Toshiyuki Namba, Midori Tuda

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Whether introduction of multiple natural enemies is more effective to suppress agricultural pests than that of a single enemy is one of the important questions for biological control. Intra-guild prédation (IGP) among natural enemies has often been considered as a candidate to explain failure of biological control by multiple enemies. Classical theoretical studies on IGP supported the view, whereas some empirical studies did not. Since the classical models were very simple, neglect of adaptive behavior of pests and natural enemies might be a reason for the partial discrepancy between the theory and observation. In a companion paper, we considered two kinds of predator-specific adaptive defenses by the pest in an IGP system and revealed their possible effects on biological control by multiple natural enemies. In the present paper, we examined the effects of predator-nonspecific adaptive defense on success or failure of biological control by multiple natural enemies. Although the predator-nonspecific defense enhanced three species coexistence as the predator-specific defense did, introduction of two natural enemies could rarely improve the efficiency of biological control. We found that the specificity of the defense against two predators and the trade-off between allocation of effort toward two kinds of defenses were key factors to realize more efficient suppression of the pest by multiple natural enemies. Our results suggest that considering plasticity in behavior of pests and natural enemies may be essential to evaluate and predict efficiencies of biological control.

Original languageEnglish
Pages (from-to)305-311
Number of pages7
JournalJournal of the Faculty of Agriculture, Kyushu University
Volume59
Issue number2
Publication statusPublished - Aug 1 2014

Fingerprint

Psychological Adaptation
natural enemies
biological control
Theoretical Models
Observation
pests
predators

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science

Cite this

Effects of nonspecific adaptive defense by pests on efficiency of biological control by multiple natural enemies. / Ikegawa, Yusuke; Ezoe, Hideo; Namba, Toshiyuki; Tuda, Midori.

In: Journal of the Faculty of Agriculture, Kyushu University, Vol. 59, No. 2, 01.08.2014, p. 305-311.

Research output: Contribution to journalArticle

@article{a8c14d3d4a2c4309a8595e3a1736ffd2,
title = "Effects of nonspecific adaptive defense by pests on efficiency of biological control by multiple natural enemies",
abstract = "Whether introduction of multiple natural enemies is more effective to suppress agricultural pests than that of a single enemy is one of the important questions for biological control. Intra-guild pr{\'e}dation (IGP) among natural enemies has often been considered as a candidate to explain failure of biological control by multiple enemies. Classical theoretical studies on IGP supported the view, whereas some empirical studies did not. Since the classical models were very simple, neglect of adaptive behavior of pests and natural enemies might be a reason for the partial discrepancy between the theory and observation. In a companion paper, we considered two kinds of predator-specific adaptive defenses by the pest in an IGP system and revealed their possible effects on biological control by multiple natural enemies. In the present paper, we examined the effects of predator-nonspecific adaptive defense on success or failure of biological control by multiple natural enemies. Although the predator-nonspecific defense enhanced three species coexistence as the predator-specific defense did, introduction of two natural enemies could rarely improve the efficiency of biological control. We found that the specificity of the defense against two predators and the trade-off between allocation of effort toward two kinds of defenses were key factors to realize more efficient suppression of the pest by multiple natural enemies. Our results suggest that considering plasticity in behavior of pests and natural enemies may be essential to evaluate and predict efficiencies of biological control.",
author = "Yusuke Ikegawa and Hideo Ezoe and Toshiyuki Namba and Midori Tuda",
year = "2014",
month = "8",
day = "1",
language = "English",
volume = "59",
pages = "305--311",
journal = "Journal of the Faculty of Agriculture, Kyushu University",
issn = "0023-6152",
publisher = "Faculty of Agriculture, Kyushu University",
number = "2",

}

TY - JOUR

T1 - Effects of nonspecific adaptive defense by pests on efficiency of biological control by multiple natural enemies

AU - Ikegawa, Yusuke

AU - Ezoe, Hideo

AU - Namba, Toshiyuki

AU - Tuda, Midori

PY - 2014/8/1

Y1 - 2014/8/1

N2 - Whether introduction of multiple natural enemies is more effective to suppress agricultural pests than that of a single enemy is one of the important questions for biological control. Intra-guild prédation (IGP) among natural enemies has often been considered as a candidate to explain failure of biological control by multiple enemies. Classical theoretical studies on IGP supported the view, whereas some empirical studies did not. Since the classical models were very simple, neglect of adaptive behavior of pests and natural enemies might be a reason for the partial discrepancy between the theory and observation. In a companion paper, we considered two kinds of predator-specific adaptive defenses by the pest in an IGP system and revealed their possible effects on biological control by multiple natural enemies. In the present paper, we examined the effects of predator-nonspecific adaptive defense on success or failure of biological control by multiple natural enemies. Although the predator-nonspecific defense enhanced three species coexistence as the predator-specific defense did, introduction of two natural enemies could rarely improve the efficiency of biological control. We found that the specificity of the defense against two predators and the trade-off between allocation of effort toward two kinds of defenses were key factors to realize more efficient suppression of the pest by multiple natural enemies. Our results suggest that considering plasticity in behavior of pests and natural enemies may be essential to evaluate and predict efficiencies of biological control.

AB - Whether introduction of multiple natural enemies is more effective to suppress agricultural pests than that of a single enemy is one of the important questions for biological control. Intra-guild prédation (IGP) among natural enemies has often been considered as a candidate to explain failure of biological control by multiple enemies. Classical theoretical studies on IGP supported the view, whereas some empirical studies did not. Since the classical models were very simple, neglect of adaptive behavior of pests and natural enemies might be a reason for the partial discrepancy between the theory and observation. In a companion paper, we considered two kinds of predator-specific adaptive defenses by the pest in an IGP system and revealed their possible effects on biological control by multiple natural enemies. In the present paper, we examined the effects of predator-nonspecific adaptive defense on success or failure of biological control by multiple natural enemies. Although the predator-nonspecific defense enhanced three species coexistence as the predator-specific defense did, introduction of two natural enemies could rarely improve the efficiency of biological control. We found that the specificity of the defense against two predators and the trade-off between allocation of effort toward two kinds of defenses were key factors to realize more efficient suppression of the pest by multiple natural enemies. Our results suggest that considering plasticity in behavior of pests and natural enemies may be essential to evaluate and predict efficiencies of biological control.

UR - http://www.scopus.com/inward/record.url?scp=84908151772&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84908151772&partnerID=8YFLogxK

M3 - Article

VL - 59

SP - 305

EP - 311

JO - Journal of the Faculty of Agriculture, Kyushu University

JF - Journal of the Faculty of Agriculture, Kyushu University

SN - 0023-6152

IS - 2

ER -