Bacterial leaf and flower spot of zinnia caused by Xanthomonas campestris pv. zinniae (Hopkins & Dowson 1949) Dye 1978

Abstract

In 1981, bacterial leaf and flower spot of zinnia was found in Ishikawa pref., Japan. The disease first appeared on the leaves as yellowish small circular spots. Those spots slowly enlarged to angular shape about 5mm in diameter and became reddish or dark brown. Lesions of flower were dark or blackish brown spots. The bacteriological tests and host range indicated that the pathogen was Xanthomonas campestris pv. zinniae (Hopkins & Dowson 1949) Dye 1978.