Infection of stem bases of winter wheat by Fusarium graminearum was directly related to the incidence of infection of seed at planting. The efficiency of transmission of the pathogen from seed to stem ranged from 55 to 94% over four sampling dates in two trials. The incidence of infection of stem bases did not increase between autumn and the following summer, indicating that all transmission occurred during the autumn. Per cent germination of seed and stand density decreased as the incidence of infected seed increased.
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Duthie et al. (1987) studied this question.
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