Physalis floridana, P. angulata, andDatura stramonium have been demonstrated to have characteristics which make them more favorable than the potato as test plants for transmission studies with leafroll virus. All three species can be inoculated in the seedling stage and develop distinct symptoms within 15 to 30 days following inoculation. Transmission percentages from single insect feedings generally range around 20 to 40 per cent forP. angulata, 40 to 70 per cent forD. stramonium and 70 to 100 per cent forP. floridana.