Serological detection of a mixed viral infection in onion seed crop and possible measures for its management.
In December 1993, a serious outbreak of a virus-like disease was observed in onion seed crops in villages around Delhi and Haryana, India. Symptoms of the disease are described. The causal organisms were identified by immunosorbent EM as onion yellow dwarf potyvirus and a mite-borne rymovirus. This is a new record of this complex disease of onion. Reasons for the appearance of the disease are discussed.