Relationship of Environmental Stress and Cytospora chrysosperma Infection to Spring Dieback of Poplar Shoots
Moisture content of poplar shoots in relation to their viability was investigated from January through April 1978 in eastern Inner-Mongolia. No injurious winter desiccation was found. Irreversible injury induced by solar radiation and subsequent infection by Cytospora chrysosperma was, however, observed in early spring. Only 1-year-old plants with late growth or extended growth in the fall were susceptible to the injury. Symptoms were successfully reproduced under controlled conditions. The relationship between the environmental stress and the secondary infection by Cytospora is discussed. Forest Sci. 30:645-651.
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