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Effects of Combining Microbial and Chemical Insecticides on Mortality of the Pecan Weevil (Coleoptera: Curculionidae)

The pecan weevil, Curculio caryae (Horn), is a key pest of pecan [Carya illinoinensis (Wangenh.) K. Koch], Current control recommendations are based on chemical insecticide applications. Microbial control agents such as the entomopathogenic nematode, Steinernema carpocapsae (Weiser) and the fungus B... Full description

Journal Title: Journal of economic entomology 2011, Vol.104 (1), p.14-20
Main Author: Shapiro-Ilan, David I
Other Authors: Cottrell, Ted E , Wood, Bruce W
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: Lanham, MD: Entomological Society of America
ID: ISSN: 0022-0493
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title: Effects of Combining Microbial and Chemical Insecticides on Mortality of the Pecan Weevil (Coleoptera: Curculionidae)
format: Article
creator:
  • Shapiro-Ilan, David I
  • Cottrell, Ted E
  • Wood, Bruce W
subjects:
  • Animals
  • Antagonism
  • Beauveria
  • Beauveria bassiana
  • Biological and medical sciences
  • Carbaryl
  • Carbaryl - chemistry
  • Carya
  • Carya - parasitology
  • Coleoptera
  • Control
  • Curculio caryae
  • Curculionidae
  • Cypermethrin
  • Fundamental and applied biological sciences. Psychology
  • Generalities
  • Horns
  • Insecta
  • Insecticides
  • Insecticides - chemistry
  • Invertebrates
  • Mortality
  • Nemathelminthia. Plathelmintha
  • Nematoda
  • Orchards
  • Pest Control, Biological
  • Pests
  • Phytopathology. Animal pests. Plant and forest protection
  • Protozoa. Invertebrates
  • Pyrethrins - chemistry
  • RAPID COMMUNICATION
  • Rhabditida
  • Steinernema
  • Steinernema carpocapsae
  • Weevils
ispartof: Journal of economic entomology, 2011, Vol.104 (1), p.14-20
description: The pecan weevil, Curculio caryae (Horn), is a key pest of pecan [Carya illinoinensis (Wangenh.) K. Koch], Current control recommendations are based on chemical insecticide applications. Microbial control agents such as the entomopathogenic nematode, Steinernema carpocapsae (Weiser) and the fungus Beauveria bassiana (Balsamo) Vuillemin occur naturally in southeastern U.S. pecan orchards and have shown promise as alternative control agents for C. caryae. Conceivably, the chemical and microbial agents occur simultaneously within pecan orchards or might be applied concurrently. The objective of this study was to determine the interactions between two chemical insecticides that are used in commercial C. caryae control (i.e., carbaryl and cypermethrin applied below field rates) and the microbial agents B. bassiana and S. carpocapsae. In laboratory experiments, pecan weevil larval or adult mortality was assessed after application of microbial or chemical treatments applied singly or in combination (microbial + chemical agent). The nature of interactions (antagonism, additivity, or synergy) in terms of weevil mortality was evaluated over 9 d (larvae) or 5 d (adults). Results for B. bassiana indicated synergistic activity with carbaryl and antagonism with cypermethrin in C. caryae larvae and adults. For S. carpocapsae, synergy was detected with both chemicals in C. caryae larvae, but only additive effects were detected in adult weevils. Our results indicate that the chemical-microbial combinations tested are compatible with the exception of B. bassiana and cypermethrin. In addition, combinations that exhibited synergistic interactions may provide enhanced C. caryae control in commercial field applications; thus, their potential merits further exploration.
language: eng
source:
identifier: ISSN: 0022-0493
fulltext: no_fulltext
issn:
  • 0022-0493
  • 1938-291X
url: Link


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titleEffects of Combining Microbial and Chemical Insecticides on Mortality of the Pecan Weevil (Coleoptera: Curculionidae)
creatorShapiro-Ilan, David I ; Cottrell, Ted E ; Wood, Bruce W
creatorcontribShapiro-Ilan, David I ; Cottrell, Ted E ; Wood, Bruce W
descriptionThe pecan weevil, Curculio caryae (Horn), is a key pest of pecan [Carya illinoinensis (Wangenh.) K. Koch], Current control recommendations are based on chemical insecticide applications. Microbial control agents such as the entomopathogenic nematode, Steinernema carpocapsae (Weiser) and the fungus Beauveria bassiana (Balsamo) Vuillemin occur naturally in southeastern U.S. pecan orchards and have shown promise as alternative control agents for C. caryae. Conceivably, the chemical and microbial agents occur simultaneously within pecan orchards or might be applied concurrently. The objective of this study was to determine the interactions between two chemical insecticides that are used in commercial C. caryae control (i.e., carbaryl and cypermethrin applied below field rates) and the microbial agents B. bassiana and S. carpocapsae. In laboratory experiments, pecan weevil larval or adult mortality was assessed after application of microbial or chemical treatments applied singly or in combination (microbial + chemical agent). The nature of interactions (antagonism, additivity, or synergy) in terms of weevil mortality was evaluated over 9 d (larvae) or 5 d (adults). Results for B. bassiana indicated synergistic activity with carbaryl and antagonism with cypermethrin in C. caryae larvae and adults. For S. carpocapsae, synergy was detected with both chemicals in C. caryae larvae, but only additive effects were detected in adult weevils. Our results indicate that the chemical-microbial combinations tested are compatible with the exception of B. bassiana and cypermethrin. In addition, combinations that exhibited synergistic interactions may provide enhanced C. caryae control in commercial field applications; thus, their potential merits further exploration.
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subjectAnimals ; Antagonism ; Beauveria ; Beauveria bassiana ; Biological and medical sciences ; Carbaryl ; Carbaryl - chemistry ; Carya ; Carya - parasitology ; Coleoptera ; Control ; Curculio caryae ; Curculionidae ; Cypermethrin ; Fundamental and applied biological sciences. Psychology ; Generalities ; Horns ; Insecta ; Insecticides ; Insecticides - chemistry ; Invertebrates ; Mortality ; Nemathelminthia. Plathelmintha ; Nematoda ; Orchards ; Pest Control, Biological ; Pests ; Phytopathology. Animal pests. Plant and forest protection ; Protozoa. Invertebrates ; Pyrethrins - chemistry ; RAPID COMMUNICATION ; Rhabditida ; Steinernema ; Steinernema carpocapsae ; Weevils
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addtitleJ Econ Entomol
descriptionThe pecan weevil, Curculio caryae (Horn), is a key pest of pecan [Carya illinoinensis (Wangenh.) K. Koch], Current control recommendations are based on chemical insecticide applications. Microbial control agents such as the entomopathogenic nematode, Steinernema carpocapsae (Weiser) and the fungus Beauveria bassiana (Balsamo) Vuillemin occur naturally in southeastern U.S. pecan orchards and have shown promise as alternative control agents for C. caryae. Conceivably, the chemical and microbial agents occur simultaneously within pecan orchards or might be applied concurrently. The objective of this study was to determine the interactions between two chemical insecticides that are used in commercial C. caryae control (i.e., carbaryl and cypermethrin applied below field rates) and the microbial agents B. bassiana and S. carpocapsae. In laboratory experiments, pecan weevil larval or adult mortality was assessed after application of microbial or chemical treatments applied singly or in combination (microbial + chemical agent). The nature of interactions (antagonism, additivity, or synergy) in terms of weevil mortality was evaluated over 9 d (larvae) or 5 d (adults). Results for B. bassiana indicated synergistic activity with carbaryl and antagonism with cypermethrin in C. caryae larvae and adults. For S. carpocapsae, synergy was detected with both chemicals in C. caryae larvae, but only additive effects were detected in adult weevils. Our results indicate that the chemical-microbial combinations tested are compatible with the exception of B. bassiana and cypermethrin. In addition, combinations that exhibited synergistic interactions may provide enhanced C. caryae control in commercial field applications; thus, their potential merits further exploration.
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4Biological and medical sciences
5Carbaryl
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13Cypermethrin
14Fundamental and applied biological sciences. Psychology
15Generalities
16Horns
17Insecta
18Insecticides
19Insecticides - chemistry
20Invertebrates
21Mortality
22Nemathelminthia. Plathelmintha
23Nematoda
24Orchards
25Pest Control, Biological
26Pests
27Phytopathology. Animal pests. Plant and forest protection
28Protozoa. Invertebrates
29Pyrethrins - chemistry
30RAPID COMMUNICATION
31Rhabditida
32Steinernema
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34Weevils
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8Carya - parasitology
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21Mortality
22Nemathelminthia. Plathelmintha
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24Orchards
25Pest Control, Biological
26Pests
27Phytopathology. Animal pests. Plant and forest protection
28Protozoa. Invertebrates
29Pyrethrins - chemistry
30RAPID COMMUNICATION
31Rhabditida
32Steinernema
33Steinernema carpocapsae
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abstractThe pecan weevil, Curculio caryae (Horn), is a key pest of pecan [Carya illinoinensis (Wangenh.) K. Koch], Current control recommendations are based on chemical insecticide applications. Microbial control agents such as the entomopathogenic nematode, Steinernema carpocapsae (Weiser) and the fungus Beauveria bassiana (Balsamo) Vuillemin occur naturally in southeastern U.S. pecan orchards and have shown promise as alternative control agents for C. caryae. Conceivably, the chemical and microbial agents occur simultaneously within pecan orchards or might be applied concurrently. The objective of this study was to determine the interactions between two chemical insecticides that are used in commercial C. caryae control (i.e., carbaryl and cypermethrin applied below field rates) and the microbial agents B. bassiana and S. carpocapsae. In laboratory experiments, pecan weevil larval or adult mortality was assessed after application of microbial or chemical treatments applied singly or in combination (microbial + chemical agent). The nature of interactions (antagonism, additivity, or synergy) in terms of weevil mortality was evaluated over 9 d (larvae) or 5 d (adults). Results for B. bassiana indicated synergistic activity with carbaryl and antagonism with cypermethrin in C. caryae larvae and adults. For S. carpocapsae, synergy was detected with both chemicals in C. caryae larvae, but only additive effects were detected in adult weevils. Our results indicate that the chemical-microbial combinations tested are compatible with the exception of B. bassiana and cypermethrin. In addition, combinations that exhibited synergistic interactions may provide enhanced C. caryae control in commercial field applications; thus, their potential merits further exploration.
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pubEntomological Society of America
pmid21404833
doi10.1603/EC10303
tpages7