CLso infection and vector (IMAGE) University of California - Riverside Caption Top left: CLso-infected tomato plant showing symptoms of disease. Top right: the potato psyllid vector of the CLso bacteria. Bottom left: Solanum umbelliferum, the wild nightshade that harbors non-pathogenic forms of CLso. Bottom right: a preserved herbarium specimen of wild nightshaded that tested positive for CLso infection. Credit Kerry Mauck/UCR Usage Restrictions none License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.