Impatiens Necrotic Spot on Cineraria
Tom Creswell, Plant Disease Diagnostician, Purdue University
Impatiens Necrotic Spot Virus (INSV) is spread in greenhouses
insects and is very difficult to control. It typically causes necrotic
spots, rings and dieback symptoms on many of the greenhouse ornamentals
which it is commonly found. See Picture
of the Week for 17 March 2003.
This sample of Cineraria had atypical symptoms of yellowing in splotches. The ELISA stick
a clear positive result for INSV and a negative for Tomato Spotted
Virus (TSWV). Control depends on ridding the greenhouse of plants
obvious symptoms and a stringent program of thrips control.