Effect of leaf infection by Kabatiella zeae on stalk rot prevalence and grain yield of maize hybrids

Eight maize hybrids were tested for resistance to eyespot (Kabatiella zeae) and stalk rot (Fusarium spp.) under field conditions in 1993–1995. The relationship between eyespot and stalk rot and their effect on grain yield of hybrids were studied. Effectiveness of the prochloraz fungicide in controll...

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Bibliographic Details
Published in:Journal of phytopathology 2004-08, Vol.152 (7), p.410-415
Main Authors: Pronczuk, M, Bojanowski, J, Warzecha, R
Format: Article
Language:English
Subjects:
Biological and medical sciences
corn
cultivars
disease control
disease incidence
disease prevalence
disease resistance
disease severity
Eyespot
Fundamental and applied biological sciences. Psychology
fungal diseases of plants
Fungal plant pathogens
fungicide control
Fusarium
Fusarium stalk rot
grain yield
hybrids
Kabatiella
Kabatiella zeae
leaf spotting
maize
meteorological parameters
pesticide application
Phytopathology. Animal pests. Plant and forest protection
plant pathogenic fungi
prochloraz
stem rot
Zea mays
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Summary:Eight maize hybrids were tested for resistance to eyespot (Kabatiella zeae) and stalk rot (Fusarium spp.) under field conditions in 1993–1995. The relationship between eyespot and stalk rot and their effect on grain yield of hybrids were studied. Effectiveness of the prochloraz fungicide in controlling both diseases was evaluated. The experiments were performed in three subtrials where plants were naturally infected, inoculated with K. zeae or treated with the fungicide, Sportak 450 EC. The relationship between intensity of leaf damage by eyespot and incidence of stalk rot has been evidently confirmed. High infection of leaf by K. zeae reduced grain yield of hybrids. However, considerable differences in prevalence of disease and yield losses were noted in successive years. The intensity of eyespot depended upon environmental conditions highly variable over the years: it was enhanced by low temperature and high air humidity in July and August. Hybrids showed significant differences in susceptibility to both diseases. Mona – hybrid from the USA and two experimental hybrids from Poland were less affected by diseases than Smolimag and Hidosil (commercial hybrids from Poland). The fungicide Sportak was effective in controlling eyespot and had an indirect influence on decreasing fusarium stalk rot.
ISSN:0931-1785
1439-0434
DOI:10.1111/j.1439-0434.2004.00864.x