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A study on occurrence regularity of Ulmus pumila withered disease


, : A study on occurrence regularity of Ulmus pumila withered disease. Journal of Northwest Forestry College 14(2): 45-50

Withered disease of Ulmus pumila is very serious in northern Shaanxi (China). There are two periods in the year when disease occurrence peaks: infection in August of the current year, and high death rate in April of the next year. The spread of spores Phoma (the causative organism) is mainly by air flow and rainfall, as well as by insects. The pathogen invades the bark through wounds and bark holes.

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Related references

Lester D.T.; Smalley E.B., 1972: Response of ulmus pumila and ulmus pumila rubra hybrids to inoculation with ceratocystis ulmi. Phytopathology 62(8): 848-852

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