P1.6
Study of the impact of weather factors on the types and characteristics of fungi diseases affecting wheat crops
Zbigniew Szwejkowski, Warmia and Mazury Univ., Olsztyn, Poland; and T. Kurowski
Fungi diseases are the most serious threat to wheat crops in Poland causing losses of up to 25%. Weather factors affect the types and intensity of disease outbreaks. The paper contains analysis of the impact of pre-onset as well as contemporaneous weather conditions such as temperature (both average and max/min), rainfall, and relative humidity on the frequency of infections caused by following pathogens: powder mildew (Erysiphe graminis), Septoria blotch (Mycosphaerella graminicola st. kon. Septoria Tritici), Glume blotch (Phaeosphaeria nodorum st. kon. Stagnospora nodorum, syn. Septoria nodorum), Brown rust (Puccinia recondita f. sp. tritici). Eyspot (Pseudocercosporella herpotrichoides), Take all (complex of fungi). Several multiple regression models were estimated using both linear as well as non-linear functional form to examine how weather factors impact the wheat crop vulnerability to those pathogens. The results of this study contribute to our ability to forecast the magnitude and characteristics of disease outbreaks in the future based on observed meteorological data, thus enabling us to take optimal protective measures.
Poster Session 1, Formal Viewing
Tuesday, 15 August 2000, 1:30 PM-3:30 PM
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