Title: MEASURING EARLY BLIGHT, ITS PROGRESS AND INFLUENCE ON FRUIT LOSSES IN NINE TOMATO CULTIVARS'
Abstract:In field tests conducted for 3 years, the severity of early b light [Alternaria porri f. sp. solani] in nine tomato cultivars was reliably measured by counting the leaves having 75% to 100% necrotic a...In field tests conducted for 3 years, the severity of early b light [Alternaria porri f. sp. solani] in nine tomato cultivars was reliably measured by counting the leaves having 75% to 100% necrotic area. The small lesioned areas on the remaining leaves rarely exceeded 6% of the total foliage surface of a plant exposed to either natural i nfection o r artifical inoculation. Disease progress curves based on both leaf and fruit infection indicated that, on average, 60% defoliation would be necessary to obtain 10% infected fruits in all cultivars tested except Mini-Rose. Fruits of Mini-Rose were free from early blight lesions. Under conditions of moderate natural infection, the total number of fruits of marketable size was not significantly reduced but the loss due to visibly infected fruits ranged from 0% to 13%. Under conditions of severe d isease created by artificial inoculation, yield reductions of 10% to 34% occurred in some cultivars in addition to a 13% to 37% loss in quality due to blemished fruit.Read More
Publication Year: 1974
Publication Date: 1974-01-01
Language: en
Type: article
Access and Citation
Cited By Count: 46
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