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Sampling and management of Bemisia tabaci (Genn.) biotype B in Australian cotton

Sequeira, R.V. and Naranjo, S.E. (2008) Sampling and management of Bemisia tabaci (Genn.) biotype B in Australian cotton. Crop Protection, 27 (9). pp. 1262-1268.

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Article Link(s): http://dx.doi.org/10.1016/j.cropro.2008.04.002

Publisher URL: http://www.elsevier.com

Abstract

Data on seasonal population abundance of Bemisia tabaci biotype B (silverleaf whitefly (SLW)) in Australian cotton fields collected over four consecutive growing seasons (2002/2003-2005/2006) were used to develop and validate a multiple-threshold-based management and sampling plan. Non-linear growth trajectories estimated from the field sampling data were used as benchmarks to classify adult SLW field populations into six density-based management zones with associated control recommendations in the context of peak flowering and open boll crop growth stages. Control options based on application of insect growth regulators (IGRs) are recommended for high-density populations (>2 adults/leaf) whereas conventional (non-IGR) products are recommended for the control of low to moderate population densities. A computerised re-sampling program was used to develop and test a binomial sampling plan. Binomial models with thresholds of T=1, 2 and 3 adults/leaf were tested using the field abundance data. A binomial plan based on a tally threshold of T=2 adults/leaf and a minimum sample of 20 leaves at nodes 3, 4 or 5 below the terminal is recommended as the most parsimonious and practical sampling protocol for Australian cotton fields. A decision support guide with management zone boundaries expressed as binomial counts and control options appropriate for various SLW density situations is presented. Appropriate use of chemical insecticides and tactics for successful field control of whiteflies are discussed.

Item Type:Article
Business groups:Agri-Science, Crop and Food Science
Additional Information:© Crown Copyright.
Keywords:Bemisia tabaci; binomial sampling plan; cotton; management zones.
Subjects:Science > Zoology > Invertebrates > Insects
Plant pests and diseases > Individual or types of plants or trees > Cotton
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Pesticides
Deposited On:03 Feb 2009 06:05
Last Modified:26 Oct 2011 01:28

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