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Abstract
Top-yellowing of peas, stunting and yellowing of dwarf beans. and leaf roll of broad beans in Canterbury, New Zealand, were found to be due almost entirely to infection with subterranean clover red leaf virus (SCRL V). SCRLV was also isolated from lupins, soya beans, and lentils and from a wide range of clovers and weed hosts including some non-leguminous species. In dwarf beans, pod yield was reduced by 77% when 100% of the plants were infected. Trapping of alate aphids and subsequent virus-transmission studies showed that 41 % of alate Aulacorthum solani carried SCRLV. The possible relationship of SCRLV, soya bean dwarf virus, and filaree red leaf virus is discussed.
