Soybean (Glycine max Merr.) is an alternative crop during the summer in Sinaloa, a northern state of Mexico. During the last 4 years, symptoms of yellowing, curled leaves, and stunting have been observed on soybean plantings, and a scrutiny of field samples collected in 2003 identified a begomovirus
Severe symptoms of suspected geminivirus etiology were manifested as intense yellow or golden mottling or mosaic of the lamina accompanied by mild leaf margin distortion on dicotyledonous weed species, Sida rhombifolia (L.) and Rhynchosia minima (L.), collected from 1999 to 2002 from the
In September 1998, tomato plants in Barbados exhibited symptoms of severe leaf curling without marginal chlorosis. These symptoms were often associated with an increase in whitefly (Bemisia tabaci) populations. DNA was extracted from leaf tissue from symptomatic tomato plants. Polymerase chain
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