Vince chemist, Are the growing tips of the plant affected? Does your plant appear to be stunted?
According to a plant pathologist at our University, viral symptoms are often most obvious in an area of active cell division, i.e., the youngest leaves, the growing tip.
A publication from our University of Hawaii College of Tropical Agriculture says of TSWV:
"Tomato plant growth ceases and senescence is promoted after infection with spotted wilt virus. In older plants, leaves near the growing tips show dark, bronze or purplish, circular necrotic spots. Fruits also show circular concentric marks. Tomato spotted wilt virus is the only virus known to be transmitted by thrips."
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