Pathogens and Parasitic Nematodes Associated With Populations of Fall Armyworm (Lepidoptera: Noctuidae) Larvae in Mexico

Molina-Ochoa, Jaime; Lezama-Gutiérrez, Roberto; González-Ramírez, Martín; López-Edwards, Marilú; Rodriguez-Vega, Manuel A.; Arceo-Palacios, Francisco

doi:10.1653/0015-4040(2003)086[0244:papnaw]2.0.co;2

Cited by 46 publications

(31 citation statements)

References 30 publications

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“…Under appropriate environmental conditions, N. rileyi has been reported to drastically reduce populations of pest noctuids in the United States, Mexico, Ecuador, Brazil, Argentina, India, and Australia (Carner, 1980;Corrêa and Smith, 1975;Faria et al, 1993;Vimala Devi et al, 2003). Research has shown that N. rileyi isolates collected from diVerent insect hosts and geographical locations possess variable biological properties (Boucias et al, 1982;IgnoVo and Boucias, 1992;Molina-Ochoa et al, 2003). For example, N. rileyi isolates originating from Spodoptera frugiperda were more virulent to S. frugiperda than were N. rileyi isolated from Anticarsia gemmatalis (Tigano-Milani et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Genotypic analysis of Nomuraea rileyi collected from various noctuid hosts

Suwannakut

Boucias

Wiwat

2005

Journal of Invertebrate Pathology

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Section: Introductionmentioning

confidence: 99%

Genotypic analysis of Nomuraea rileyi collected from various noctuid hosts

Suwannakut

Boucias

Wiwat

2005

Journal of Invertebrate Pathology

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“…They maintained that there is a need to understand, promote and maximize the effectiveness of indigenous populations of natural enemies, then based on the knowledge and results of these actions, we should supplement any gaps by importation. In accordance with Lewis et al (1997), and as a result of economic and environmental concerns, surveys for natural enemies of the FAW, particularly, pathogens, parasitoids and parasites, occurring in the Americas, and the Caribbean Basin have been conducted to develop a better understanding of this complex (Molina-Ochoa et al 2001, 2003a, 2004.…”

mentioning

confidence: 99%

Survey for Hymenopteran and Dipteran Parasitoids of the Fall Armyworm (Lepidoptera: Noctuidae) in Chiapas, Mexico

Ruiz-Nájera¹,

Molina-Ochoa²,

Carpenter³

et al. 2007

Journal of Agricultural and Urban Entomology

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“…The community of entomopathogens used in this study reflects what has been found in natural and agricultural systems, which can contain both entomopathogenic nematodes and fungi (Chandler et al, 1997;Bruck, 2004;Pilz et al, 2008). Several surveys have recovered M. brunneum, B. bassiana and nematodes in the genera Steinernema and Heterorhabditis from soil samples at the same site (Molina-Ochoa et al, 2003;Shapiro-Ilan et al, 2003). Thus, the community of entomopathogens used in this study formed a biologically realistic assemblage of soil-dwelling entomopathogens.…”

Section: Discussionmentioning

confidence: 90%

Tritrophic interactions amongBtmaize, an insect pest and entomopathogens: effects on development and survival of western corn rootworm

Petzold-Maxwell

Jaronski

Gassmann

2011

Annals of Applied Biology

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Agricultural systems often provide a model for testing ecological hypotheses, while ecological theory can enable more effective pest management. One of the best examples of this is the interaction between host-plant resistance and natural enemies. With the advent of crops that are genetically modified to produce insecticidal toxins from the bacterium Bacillus thuringiensis (Bt), a new form of host-plant resistance has been introduced to agroecosystems. How Bt crops interact with natural enemies, especially insect pathogens in below-ground systems, is not well understood, but provides a unique opportunity to study below-ground tritrophic interactions. In this study, we used two species of entomopathogenic fungi and three species of entomopathogenic nematodes to determine how this community of soil-borne natural enemies might interact with Bt maize (event 59122, expressing the insecticidal protein Cry34/35Ab1) to affect survival and development of western corn rootworm (Diabrotica virgifera virgifera), which is an obligate root feeder and a serious pest of maize. We ran two experiments, one in a greenhouse and one in a growth chamber. Both experiments consisted of a fully crossed design with two maize treatments (Bt maize and non-Bt maize) and two entomopathogen treatments (present or absent). The community of entomopathogens significantly increased mortality of western corn rootworm, and Bt maize increased larval developmental time and mortality. Entomopathogens and Bt maize acted in an independent and additive manner, with both factors increasing the mortality of western corn rootworm. Results from this study suggest that entomopathogens may complement host-plant resistance from Bt crops. RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. AbstractAgricultural systems often provide a model for testing ecological hypotheses, while ecological theory can enable more effective pest management. One of the best examples of this is the interaction between host-plant resistance and natural enemies. With the advent of crops that are genetically modified to produce insecticidal toxins from the bacterium Bacillus thuringiensis (Bt), a new form of host-plant resistance has been introduced to agroecosystems. How Bt crops interact with natural enemies, especially insect pathogens in belowground systems, is not well understood, but provides a unique opportunity to study below-ground tritrophic interactions. In this study, we used two species of entomopathogenic fungi and three species of entomopathogenic nematodes to determine how this community of soil-borne natural enemies might interact with Bt maize (event 59122, expressing the insecticidal protein Cry34/35Ab1) to affect survival and development of western corn rootworm (Diabrotica virgifera virgifera), which is an obligate root feeder and a serious pest of maize. We ran two experiments, one in a greenhouse and one in a growth chamber. Both e...

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Pathogens and Parasitic Nematodes Associated With Populations of Fall Armyworm (Lepidoptera: Noctuidae) Larvae in Mexico

Cited by 46 publications

References 30 publications

Genotypic analysis of Nomuraea rileyi collected from various noctuid hosts

Genotypic analysis of Nomuraea rileyi collected from various noctuid hosts

Survey for Hymenopteran and Dipteran Parasitoids of the Fall Armyworm (Lepidoptera: Noctuidae) in Chiapas, Mexico

Tritrophic interactions amongBtmaize, an insect pest and entomopathogens: effects on development and survival of western corn rootworm

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