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Selection of Sampling Methods to Determine Weed Abundance in Apple (Malus domestica) Orchards

Published online by Cambridge University Press:  12 June 2017

Jeffery S. Conn ,
Charles H. Proctor  and
Walter A. Skroch
Jeffery S. Conn
Affiliation:
Dep. Hortic. Sci., currently Res. Agron., Agric. Res. Serv., U.S. Dep. Agric, Agric. Exp. Stn., Univ. of Alaska, Fairbanks, AK 99701
Charles H. Proctor
Affiliation:
Dep. Statistics
Walter A. Skroch
Affiliation:
Dep. Hortic. Sci., North Carolina State Univ., Raleigh, NC 27650
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Abstract

A method is presented to determine which of a set of sampling techniques is most nearly optimum for sampling weed abundance. To employ the method, one needs first to develop a set of sampling alternatives. A pilot survey is then conducted to determine time costs and sampling and measurement error variances associated with each technique. We used this method to determine which of three plot sizes (0.6 by 0.6 m, 0.6 by 1.5 m, 1.2 by 2.1 m) and two types of orchard scans is most nearly optimum for estimating weed abundance in apple [Malus domestica (Bork)] orchards. The results indicate that, for weed species that are fairly apparent, orchard scans are optimal when less than 8 h of sampling effort is expended, but when a high degree of precision is required, or when the weed species is more difficult to detect, plot samples may be the better choice. A size of plot ca. 0.6 by 1.5 m size was found to be most nearly optimum.

Keywords

Optimum samplingplot samplingMuhlenbergia schreberiRubus sp.Plantago majorTaraxacum officinaleSolanum carolinenseintegrated pest management
Type
Research Article
Information
Weed Science , Volume 30 , Issue 1 , January 1982 , pp. 35 - 40
Copyright
Copyright © 1982 by the Weed Science Society of America 

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References

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