21. Some of the more common symptoms are chlorotic rings, leaf rugosity and green mosaic. 22. This chlorosis then spreads throughout the leaf and eventually these chlorotic areas can become necrotic. 23. On a later stage, a hard crust can cover the lesions showing a chlorotic halo. 24. The needles of lightly to moderately infested trees exhibit chlorotic mottling where individual adults have fed. 25. Additionally, the crown may become thin and foliage ( leaves or needles ) becomes chlorotic . 26. There are currently four species in this genus including the type species Soybean chlorotic mottle virus. 27. Plants with Ht1 Ht2, or Ht3 genes have smaller, chlorotic lesions and reduced sporulation. 28. Its name comes from its most common symptom being chlorotic ringspots on the leaves of infected plants. 29. There are currently seven species in this genus including the type species Apple chlorotic leaf spot virus. 30. In sweet cherries, PNRSV causes reduced leaf size and produces diffused chlorotic rings and / or spots.
