SAMPLING STRATEGIES FOR ASSESSING THE INTRAPLANT DENSITY OF THE CASSAVA GREEN MITE (MONONYCHELLUS-TANAJOA) - A CASE-STUDY

被引：5

作者：

NACHMAN, G

PEDERSEN, OC

MUNSTERSWENDSEN, M

TOMKIEWICZ, J

机构：

[1] Institute of Population Biology, University of Copenhagen, Copenhagen, DK-2100 Ø, 15, Universitetsparken

来源：

EXPERIMENTAL AND APPLIED ACAROLOGY | 1990年 / 9卷 / 1-2期

关键词：

D O I：

10.1007/BF01198981

中图分类号：

Q96 [昆虫学];

学科分类号：

摘要：

Sampling data from a single cassava plant were used for testing various sampling methods. It was found that the degree of leaf damage was poorly correlated with the number of cassava green mites (CGM) present on a leaf. Sampling of specific mite stages should take into consideration the effect of leaf damage on the age distribution of the mites. Simple random sampling resulted in a high between-leaf variation caused by a vertical gradient in spider-mite abundance. The between-leaf variation could be reduced by stratified sampling. The optimum number of strata was three. Subsampling of leaflets combined with stratification provided the most precise estimates for a given sampling effort. Various regression methods for estimating the area of a cassava leaf from some simple measurements were compared. Combining the length of the longest leaflet with the number of leaflets gave the best prediction, explaining 95.8% of the total variation in observed leaf areas. © 1990 Elsevier Science Publishers B.V.

引用

页码：31 / 49

页数：19

共 21 条

[1]

Carey J.R., Practical application of the stable age distribution: Analysis of a tetranychid mite (Acari: Tetranychidae) population outbreak, Environmental Entomology, 12, pp. 10-18, (1983)

[2]

Cochran W.G., Sampling Techniques, (1977)

[3]

Colquhoun D., Lectures on Biostatistics, (1971)

[4]

French N., Parr W.J., Gould H.J., Willia J.J., Simmonds S.P., Development of biological methods for the control of Tetranychus urticae on tomatoes using Phytoseiulus persimilis, Annals of Applied Biology, 83, pp. 177-189, (1976)

[5]

Gutierrez J., The cassava green mite in Africa: One or two species? (Acari: Tetranychidae), Exp. Appl. Acarol., 3, pp. 163-168, (1987)

[6]

Hussey N.W., Parr W.J., The effect of glasshouse red spider mite, (Tetranychus urticae Koch) on the yield of cucumbers, J. Hortic. Sci., 38, pp. 255-263, (1963)

[7]

Jones V.P., Parrella M.P., Intratree regression sampling plans for citrus red mite (Acari: Tetranychidae) on lemons in southern California, Journal of Economic Entomology, 77, pp. 810-813, (1984)

[8]

LeRoux E.J., Reimer C., Variation between samples of immature stages, and of mortalities from some factors of the eye-spotted bud moth, Spilonota ocellana (D.&S.) (Lepidoptera: Olethreutidae), and the pistol casebearer, Coleophora serratella (L.) (Lepidoptera: Coleophoridae), on apple in Quebec, The Canadian Entomologist, 91, pp. 428-449, (1959)

[9]

Markham R.H., Robertson I.A.D., Kirkby R.A., Cassava green mite in East Africa. a regional approach to research and control, Insect Sei. Appl., 8, pp. 909-914, (1987)

[10]

Megevand B., Yaninek J.S., Friese D.D., Classical biological control of the cassava green mite, Insect Sci. Appl., 8, pp. 871-874, (1987)

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