Mosaic
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Mosaic is caused by Potato Virus Y. Primary symptoms of PVY will depend upon potato variety. Symptoms may include mottling or yellowing of leaflets and crinkling of the leaf tissue. |
Potato Leafroll Virus
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Potato Leafroll Virus is an aphid-vectored virus. Typically the leaves will be rolled with a leathery feel to the touch. When shaken, the leaves will make a sound similar to parchment. The rolled leaves are usually lighter in color than healthy ones. In some varieties, a reddish or purple discoloration occurs on the underside of the leaves. |
Growth Regulator Damage
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Herbicide growth regulators such as 2,4D cause irregular growth patterns in potato foliage. |
