There is also a complex selection of horticultural pests and diseases, including the tobacco or sweet potato whitefly, bemisia tabaci and other glasshouse insects, the pepino mosaic virus - which hits tomatoes - potato spindle tuber
viroid and angular leaf spot on strawberries.
A shipment of Maine seed potatoes was prohibited from being planted in New Brunswick, Canada, because it was believed to be infected with potato spindle tuber viroid.
The crux of the matter was what type of test would be used to determine whether or not potato spindle tuber viroid was present.
Virus detectados en Costa Rica: sintomatologia, morfologia, transmision e importancia de Potato Virus Y, A, S, V, M, T y X, asi como de Potato Leaf Roll-, Mop-Top, Andean Mottle, Aucuba Mosaic-, Alfalfa Mosaic- y Tobacco Ringspot Virus, y de Potato Spindle Tuber
Another USDA scientist found the first viroid ever identified by scientists when studying potato spindle tuber
disease, which is transmitted in tubers and seed.
In 1971, ARS researchers determined that a viroid was the cause of potato spindle tuber
disease, which previously had been identified as a virus.
At the heart of all this activity is the potato spindle tuber
viroid (PSTVd), which the scientists use in their experiments.
It is able to detect potato spindle tuber viroid that attacks potato tubers and tomato roots, stems, and leaves.
So far, Podleckis has screened over 200 apple and pear trees for apple scar skin viroid and about 100 potato plants for potato spindle tuber viroid using the new tissue blot technique.