A Symptomatic Mutant of Onion Yellows Phytoplasma Derived from a Greenhouse-maintained Isolate

Abstract

A symptomatic mutant with mild symptoms derived from a greenhouse-maintained isolate of onion yellows phytoplasma after using garland chrysanthemum and leafhopper vector, Macrosteles striifrons for about 10 years. From comparing characteristics of the wild type and symptomatic mutant, the symptomatic mutant was similar to the wild type in its host range, transmission pattern and incubation periods in the infected plants and insects, and differed only in the symptoms in diseased plants.