Abstract
Tobacco etch is one of the most prevalent and injurious viruses on sweet peppers in southern Ontario. The virus occurs in several strains. Detailed descriptions of symptoms produced by etch on sweet, hot, and semihot varieties of peppers are described. Symptoms on the pepper fruits have been observed chiefly on the sweet types. The widespread occurrence of etch in peppers is attributed to the prevalence of the vector Myzus persicae Sulz. Possible sources of etch that may give rise to epidemics on pepper and tobacco crops in southern Ontario are discussed.
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