Tospoviruses, weeds and thrips associated with chrysanthemum (Dendranthema grandiflora Tzvelev cv. Polaris)

Abstract Under field conditions, impatiens necrotic spot (INSV) and tomato spotted wilt tospoviruses (TSWV) were detected by the dot blot technique in chrysanthemum (Dendranthema grandiflora Tzvelev cv. Polaris) plants having concentric rings and line patterns, from Villa Guerrero and Coatepec de Harinas, State of Mexico. There were 15 species of thrips associated with chrysanthemum in the region, 10 already known and five being described as new species. The known species were: Frankliniella adadusta, F. aurea, F. helianthi, F. inutilis, F. minuta, F. simplex celata, F. occidentalis brunnescens, F. occidentalis dubia, F. occidentalis and Thrips tabaci. From among the aforementioned species, only the last two have been recognized as vectors of tospovirus. Twenty‐six species of weeds were found associated with chrysanthemum, of which, 16 were positive for the TSWV and none for the INSV.