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The effect of weather variables on infection of asparagus by Puccinia asparagi D.C.

P. Di Lenna, S. Benedettelli and B. Folletto
Advances in Horticultural Science
Vol. 9, No. 3 (1995), pp. 130-135
Stable URL: http://www.jstor.org/stable/42881352
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The effect of weather variables on infection of asparagus by Puccinia asparagi D.C.
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Abstract

Climatic data and the incidence of asparagus rust (Puccinia asparagi D.C.) were recorded from 1991 and 1992 on two experimental fields in the two most important asparagus-growing areas of the Veneto region in Italy. One site was also monitored for 1993. Disease incidence was assessed by fortnightly records of the number of uredia or telia/plants; climatic data included daily temperature (minimum and maximum), relative humidity (minimum and maximum) and rainfall (mm). Stepwise multiple regression analysis showed six significant correlations between climatic factor and disease incidence; five of them referred to relative humidity. Data indicate that disease incidence during summer is the result of the interaction among foregoing climatic events, which affect early phases of the pathogen's biological cycle, and climatic factors that directly affect the pathogen's structures present at the time of the disease onset.

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