Greenhouse - Impatiens Necrotic Spot Virus, INSV

INSV, Impatiens Necrotic Spot Virus attacks many greenhouse plants including impatiens, New Guinea Impatiens, Double Impatiens, and Tuberous Begonia. I have had it diagnosed in Kent County greenhouses on many occasions. It is commonly brought in on propagation material and can be spread by thrips in the greenhouse. To manage INSV you need to reject any suspicious plant materials that come in, exclude thrips, and have a good thrips control program.

INSV on impatiens, New Guinea impatiens, Alstromeria, tuberous begonia and Cineraria. Photos from NC State University and University of Connecticut Extension.