By J.M. Waller, J.M. Lenne, S. Waller
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Additional resources for Plant Pathologists' Pocketbook, 3rd Edition
James AUDPC models are more advanced than CP models in that they can be used to distinguish two epidemics with different disease progress curves but which have the same percentage severity at a critical date. Schneider et al. 95. CP and AUDPC models have been successfully applied to situations where the disease is a late epidemic and where the infection rate is reasonably stable. g. cereals. These restrictions do not apply to the multiple point models, which can be used for diseases with high variability in infection rates and where the disease progress curves can be markedly different.
IRRI, Los Banos, Philippines, 52 pp. C. (1969) A survey of foliar diseases of spring barley in England and Wales in 1967. Annals of Applied Biology 63, 253–263. C. (1971a) An illustrated series of assessment keys for plant diseases, their preparation and usage. Canadian Plant Disease Survey 51, 39–65. C. (1971b) A manual of disease assessment keys for plant diseases. Publication, Canadian Department of Agriculture No. 1458, 80 pp. C. (1974) Assessment of plant diseases and losses. Annual Review of Phytopathology 12, 27–48.
Micro-plots are the most common technique for experimentation with nematodes and soil-borne fungal diseases (Teng, 1987). The location of experiments in different geographical areas, expected to have different levels of disease, can also be used in conjunction with any of the above techniques to increase the chances of achieving variability in disease level. g. , 1973a). Data generation using on-farm surveys This aspect is also discussed in Chapter 3. In comparison to field experiments, there has been relatively little effort in the development of survey methodology, although it is equally, or perhaps even more important.