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CAB eBooks

Ebooks on agriculture and the applied life sciences from CAB International

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CABI Book Chapter Info
Cover for Modelling the spread of invasive species to support pest risk assessment: principles and application of a suite of generic models.

The estimation of rates and patterns of spread is one of the key steps in a pest risk assessment. Pest risk analysts across the world wish to make quantitative, scientifically defensible assessments of likely spread by invasive alien species. However, data and time to develop detailed models for...

Author(s)
Robinet, C.; Kehlenbeck, H.; Werf, W. van der
ISBN
2015 CABI (H ISBN 9781780643946)
Type
Book chapter
CABI Book Chapter Info
Cover for Basic concepts of decision making in pest management.

Knowledge and information related to all aspects of the crop-pest system are the foundations on which modern pest management decisions are based. In this chapter, these foundations are categorized (i.e. knowledge about the dynamics of the production system, socio-economic information and...

Author(s)
Binns, M. R.; Nyrop, J. P.; Werf, W. van der
ISBN
2000 CABI (H ISBN 9780851993478)
Type
Book chapter
CABI Book Chapter Info
Cover for Basic concepts of sampling for pest management.

This chapter starts with the concept of randomness and shows how a lack of randomness in sampling can lead to bias. Bias, precision and accuracy are defined and described, and ways of avoiding bias when collecting sample data are presented. Four attributes that determine the basic trustworthiness...

Author(s)
Binns, M. R.; Nyrop, J. P.; Werf, W. van der
ISBN
2000 CABI (H ISBN 9780851993478)
Type
Book chapter
CABI Book Chapter Info
Cover for Classifying pest density.

This chapter returns to basic: the choice between sampling for estimation and sampling to make decisions. It begins by contrasting estimation and classification, and states why classification of crop pest density is more appropriate than estimation for pest management decision-making. It examines...

Author(s)
Binns, M. R.; Nyrop, J. P.; Werf, W. van der
ISBN
2000 CABI (H ISBN 9780851993478)
Type
Book chapter
CABI Book Chapter Info
Cover for Distributions.

This chapter describes how spatial patterns (e.g. spatial pattern of Colorado potato beetle [Leptinotarsa decemlineata] on potato plants) in the field are related to observed frequency distributions of sample counts. Four probability distributions are discussed, which are tools for characterizing...

Author(s)
Binns, M. R.; Nyrop, J. P.; Werf, W. van der
ISBN
2000 CABI (H ISBN 9780851993478)
Type
Book chapter
CABI Book Chapter Info
Cover for Sequential sampling for classification.

This chapter presents 3 methods for sequential classification of crop pest abundance or pest incidence: Iwao, Wald's SPRT and Converging Lines. Of these, Iwao and Wald's SPRT are commonly used in pest management sampling. With these 3 methods, the need for further sample information is evaluated...

Author(s)
Binns, M. R.; Nyrop, J. P.; Werf, W. van der
ISBN
2000 CABI (H ISBN 9780851993478)
Type
Book chapter
CABI Book Chapter Info
Cover for Enhancing and evaluating the usefulness of sampling plans.

This chapter reviews how the usefulness of sampling plans for crop pest management decision making may be maximized by proper choice of design ingredients, by suitable presentation of the decision tool to users, and by use of simulation tools and field methods, along with user interaction, for...

Author(s)
Binns, M. R.; Nyrop, J. P.; Werf, W. van der
ISBN
2000 CABI (H ISBN 9780851993478)
Type
Book chapter
CABI Book Chapter Info
Cover for Binomial counts.

This chapter shows how to construct presence-absence binomial count sample plans and other more general binomial plans as replacements for full count plans. It also shows how to assess the loss of information, and how to ensure that the loss is not critical to crop pest management decision making....

Author(s)
Binns, M. R.; Nyrop, J. P.; Werf, W. van der
ISBN
2000 CABI (H ISBN 9780851993478)
Type
Book chapter
CABI Book Chapter Info
Cover for Multiple sources of variation.

This chapter discusses the situation in which variability in sample counts is associated with the structure of the host on which a pest (such as crop pest) is found or with the spatial arrangement of observed sample units. The first part introduces a procedure called the nested analysis of variance ...

Author(s)
Binns, M. R.; Nyrop, J. P.; Werf, W. van der
ISBN
2000 CABI (H ISBN 9780851993478)
Type
Book chapter
CABI Book Chapter Info
Cover for Resampling to evaluate the properties of sampling plans.

This chapter explains how resampling is performed to estimate the operating characteristics (OC) and average sample number (ASN) functions and how functions typically differ from those on theoretical distribution models. To accumulate data representing the distribution of the crop pest over the...

Author(s)
Binns, M. R.; Nyrop, J. P.; Werf, W. van der
ISBN
2000 CABI (H ISBN 9780851993478)
Type
Book chapter