Sampling schemes for estimating spikelet incidence of Fusarium head blight

Ridout, Martin S. and Xu, X. and Wan, Y.Y.K (2007) Sampling schemes for estimating spikelet incidence of Fusarium head blight. Annals of Applied Biology, 151 (3). pp. 341-347. ISSN 0003-4746 . (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Fusarium head blight (FHB) is an important disease of wheat crops. The incidence of diseased spikelets in the population is most naturally estimated by sampling ears of wheat and counting the number of infected spikelets, X, and the total number of spikelets, Y, on each ear. However, there is usually much more variation from ear to ear in the number of infected spikelets than in the total number of spikelets and in practice it is common to obtain a larger sample of X values than Y values. In this paper, we investigate the relative efficiencies of these alternative sampling procedures. Based on historical data, we show that for the levels of disease incidence typically encountered, the latter sampling scheme is indeed more efficient. The results are relevant to estimating disease incidence in other crops.

Item Type: Article
Uncontrolled keywords: delta method; disease incidence; overdispersion; relative efficiency; underdispersion
Subjects: Q Science > QA Mathematics (inc Computing science) > QA276 Mathematical statistics
S Agriculture > SB Plant culture
Divisions: Faculties > Science Technology and Medical Studies > School of Mathematics Statistics and Actuarial Science > Statistics
Depositing User: Martin S Ridout
Date Deposited: 07 Jun 2008 12:01
Last Modified: 01 May 2014 15:55
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