With the dispersal of aphids from red clover, Trifolium pratense I.., to 'Red Mexican' beans, Phaseolus vulgaris L, was studied in eastern washington by monitoring with Moericke water traps and sticky impingement traps, bean yellow mosaic disease (BYMV) was found to occur within 4 weeks of plant emergence. The time of the spread was related to the earliest monitored dispersal of the green peach aphid, Myzus persicae (Sulzer), and the pea aphid, Acyrthosiphon pisum (Harris), known vectors of BYMV. Species of leafhoppers found in fields of red clover adjacent to fields of beans were not instrumental in transmitting viruses to beans.
Document Type: Research Article
Publication date: August 1, 1970
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