Apparent resistance of groundnut cultivar Robut 33-1 to bud necrosis diseaseP WAminauthorBud necrosis disease (BN D), caused by tomato spotted wilt virus (TSWV) and transmitted by thrips Frankliniella schuhzei, is the most important virus disease of groundnut in India. A high-yielding cultivar, Robut 33-1, was identified in field tests as having 50-90% lower BND incidence than the commonly grown cultivar TMV 2. The resistance is passive; i.e., when Robut 33-1 plants are infected either by sap inoculation or by infective thrips, they develop normal symptoms of BN D. Robut 33-1 plants did not adversely affect the longevity and fecundity of F. schultzei; however, in field tests, thrips infestation was lower on Robut 33-1 than on TMV 2. This indicates a nonpreference of thrips for cultivar Robut 33-1, resulting in low incidence of BND.Groundnut1985Article