Purple-red color of progressed psyllid yellows
Vegetable
Symptoms of psyllid yellows first show up as slight yellowing or purpling
As the condition progresses the entire plant top changes to a yellowish-green or purple-red color
Close up of a psyllid nymph on a tomato leaf
A psyllid nymph found on the underside of a tomato leaf about two weeks ago in Kaysville, Utah
Thrips frass occurs as dark tarspots which can contaminate fruit
Larvae are wingless with tapered bodies
"Rasping" and stippling are typical symptoms of thrips feeding
Most adult thrips are slender, elongate, minute, and range in color from white, yellow, dark brown, or black
IYSV symptoms include bleached spots on leaves that sometimes have a green center
TSWV symptoms include necrotic spots on the upper sides of young leaves - Cornell University
