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Three Release Rates of Dicyphus hesperus (Hemiptera: Miridae) for Management of Bemisia tabaci (Hemiptera: Aleyrodidae) on Greenhouse Tomato

The sweetpotato whitefly, Bemisia tabaci, is a pest of greenhouse-grown tomato. Restrictions on insecticides in enclosed structures and the presence of commercial pollinators limit the options for the chemical control of whiteflies in greenhouses, increasing the importance of biological controls. Di...

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Autores principales: Smith, Hugh A., Krey, Karol L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6681358/
https://www.ncbi.nlm.nih.gov/pubmed/31331037
http://dx.doi.org/10.3390/insects10070213
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author Smith, Hugh A.
Krey, Karol L.
author_facet Smith, Hugh A.
Krey, Karol L.
author_sort Smith, Hugh A.
collection PubMed
description The sweetpotato whitefly, Bemisia tabaci, is a pest of greenhouse-grown tomato. Restrictions on insecticides in enclosed structures and the presence of commercial pollinators limit the options for the chemical control of whiteflies in greenhouses, increasing the importance of biological controls. Dicyphus hesperus is a zoophytophagous mirid predator native to North America. Three release rates of D. hesperus were evaluated on greenhouse tomato for control of the sweetpotato whitefly. The release rates were one, two or three adult D. hesperus per tomato plant each week for three weeks in cages containing four tomato plants and one mullein banker plant. There were fewer whitefly eggs in cages receiving predators than untreated cages one week after the third release, and fewer whitefly nymphs in cages receiving predators two weeks after the third release. There were no statistical differences in whitefly eggs or nymphs among predator release treatments. The highest release rate resulted in a 60% reduction in whitefly nymphs. Forty-two days after the first predator releases, there were no differences among release treatments in the number of D. hesperus. Our results indicate that D. hesperus can contribute management of B. tabaci on greenhouse tomato, but that it may be insufficient as a sole strategy.
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spelling pubmed-66813582019-08-09 Three Release Rates of Dicyphus hesperus (Hemiptera: Miridae) for Management of Bemisia tabaci (Hemiptera: Aleyrodidae) on Greenhouse Tomato Smith, Hugh A. Krey, Karol L. Insects Article The sweetpotato whitefly, Bemisia tabaci, is a pest of greenhouse-grown tomato. Restrictions on insecticides in enclosed structures and the presence of commercial pollinators limit the options for the chemical control of whiteflies in greenhouses, increasing the importance of biological controls. Dicyphus hesperus is a zoophytophagous mirid predator native to North America. Three release rates of D. hesperus were evaluated on greenhouse tomato for control of the sweetpotato whitefly. The release rates were one, two or three adult D. hesperus per tomato plant each week for three weeks in cages containing four tomato plants and one mullein banker plant. There were fewer whitefly eggs in cages receiving predators than untreated cages one week after the third release, and fewer whitefly nymphs in cages receiving predators two weeks after the third release. There were no statistical differences in whitefly eggs or nymphs among predator release treatments. The highest release rate resulted in a 60% reduction in whitefly nymphs. Forty-two days after the first predator releases, there were no differences among release treatments in the number of D. hesperus. Our results indicate that D. hesperus can contribute management of B. tabaci on greenhouse tomato, but that it may be insufficient as a sole strategy. MDPI 2019-07-19 /pmc/articles/PMC6681358/ /pubmed/31331037 http://dx.doi.org/10.3390/insects10070213 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Smith, Hugh A.
Krey, Karol L.
Three Release Rates of Dicyphus hesperus (Hemiptera: Miridae) for Management of Bemisia tabaci (Hemiptera: Aleyrodidae) on Greenhouse Tomato
title Three Release Rates of Dicyphus hesperus (Hemiptera: Miridae) for Management of Bemisia tabaci (Hemiptera: Aleyrodidae) on Greenhouse Tomato
title_full Three Release Rates of Dicyphus hesperus (Hemiptera: Miridae) for Management of Bemisia tabaci (Hemiptera: Aleyrodidae) on Greenhouse Tomato
title_fullStr Three Release Rates of Dicyphus hesperus (Hemiptera: Miridae) for Management of Bemisia tabaci (Hemiptera: Aleyrodidae) on Greenhouse Tomato
title_full_unstemmed Three Release Rates of Dicyphus hesperus (Hemiptera: Miridae) for Management of Bemisia tabaci (Hemiptera: Aleyrodidae) on Greenhouse Tomato
title_short Three Release Rates of Dicyphus hesperus (Hemiptera: Miridae) for Management of Bemisia tabaci (Hemiptera: Aleyrodidae) on Greenhouse Tomato
title_sort three release rates of dicyphus hesperus (hemiptera: miridae) for management of bemisia tabaci (hemiptera: aleyrodidae) on greenhouse tomato
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6681358/
https://www.ncbi.nlm.nih.gov/pubmed/31331037
http://dx.doi.org/10.3390/insects10070213
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