Sampling protocol to detect Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) in mixed species populations in greenhouse vegetable crops

Jennifer Spinner, Sarah Mansfield, Leigh Pilkington, Peter Thomson

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Current sampling protocols for pest whitefly in greenhouse cropping systems are not adequate for detection of Bemisia tabaci when it is part of a mixed species population. Greenhouse vegetable and flower crops in the north, west and south of Sydney were sampled for fourth-instar whitefly nymphs in autumn, winter and spring of 2007. Bemisia tabaci was found in all regions: in the north in winter, the west in all seasons and the south in autumn and winter. A comparison of a Poisson model for pest abundance and a binomial model of presence/absence showed the same factors to be significant, indicating that it is sufficient to sample for presence/absence of the pest on individual plants, rather than to measure pest abundance per plant. A model using the binomial distribution determined that if more than 20% of plants are infested with B. tabaci, a sample size of 20 whole plants per greenhouse is sufficient to detect the presence of B. tabaci with greater than 95% confidence.
Original languageEnglish
Pages (from-to)276-280
Number of pages5
JournalAustral Entomology
Volume50
Issue number3
DOIs
Publication statusPublished - Aug 2011

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Bemisia tabaci
vegetable crops
Aleyrodidae
vegetable
Hemiptera
pests
greenhouses
whitefly
crop
sampling
winter
autumn
nymphs
cropping systems
cropping practice
flower
instars
vegetables
flowers
pest

Cite this

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title = "Sampling protocol to detect Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) in mixed species populations in greenhouse vegetable crops",
abstract = "Current sampling protocols for pest whitefly in greenhouse cropping systems are not adequate for detection of Bemisia tabaci when it is part of a mixed species population. Greenhouse vegetable and flower crops in the north, west and south of Sydney were sampled for fourth-instar whitefly nymphs in autumn, winter and spring of 2007. Bemisia tabaci was found in all regions: in the north in winter, the west in all seasons and the south in autumn and winter. A comparison of a Poisson model for pest abundance and a binomial model of presence/absence showed the same factors to be significant, indicating that it is sufficient to sample for presence/absence of the pest on individual plants, rather than to measure pest abundance per plant. A model using the binomial distribution determined that if more than 20{\%} of plants are infested with B. tabaci, a sample size of 20 whole plants per greenhouse is sufficient to detect the presence of B. tabaci with greater than 95{\%} confidence.",
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Sampling protocol to detect Bemisia tabaci (Gennadius) (Hemiptera : Aleyrodidae) in mixed species populations in greenhouse vegetable crops. / Spinner, Jennifer; Mansfield, Sarah; Pilkington, Leigh; Thomson, Peter.

In: Austral Entomology, Vol. 50, No. 3, 08.2011, p. 276-280.

Research output: Contribution to journalArticle

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