Abstract
Continued studies on the necrotic leaf spot disease of Populus tremuloides Michx. and related hybrids have verified transmission of the causal agent by grafting and demonstrated its passage through seed. Attempted transmissions by mechanical means to a wide variety of herbaceous hosts were negative except for extracts from two hybrids which induced necrotic spots on Vigna sinensis cv. Black Eye.Some aspects of disease development were revealed by electron microscopy. Attempts to visualize a causal agent were not successful but occasional virus-like aggregates were observed.
Publisher
Canadian Science Publishing
Cited by
5 articles.
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