VIEW ARTICLE

Disease Control and Pest Management

Comparison of Models for Estimating Yield Loss Caused by Leaf Rust (Puccinia hordei) on Zephyr Barley in New Zealand. P. S. Teng, Department of Agricultural Microbiology and Department of Farm Management, Lincoln College, Canterbury, New Zealand, Present address of senior author: Department of Plant Pathology, University of Minnesota, St. Paul, 55108; R. C. Close(2), and M. J. Blackie(3). (2)(3)Department of Agricultural Microbiology and Department of Farm Management, Lincoln College, Canterbury, New Zealand. Phytopathology 69:1239-1244. Accepted for publication 19 June 1979. Copyright 1979 The American Phytopathological Society. DOI: 10.1094/Phyto-69-1239.

The accurate assessment of yield loss is an important component of any comprehensive disease management scheme. Three types of disease-loss models for estimating barley yield loss caused by leaf rust (Puccinia hordei) were compared. The critical point, area-under-curve, and multiple point models were evaluated using four selected statistical criteria. Although all models were satisfactory, several multiple point models best predicted yield loss.