are subject to a large number of virus diseases, including mosaic, chrysanthemum
smut virus, tomato spotted wilt virus, and aster yellows. Virus-infected plants
generally have spindly, stunted shoots and yellowed foliage. Leaves may be
marked with ring spots, lines, pale areas, or mottling. Infected plants are
stunted, form dense "rosettes", and have small flowers. Virus
diseases are spread by sucking insects such as aphids and leafhoppers.
There is no cure for
virus-infected plants. Remove and destroy them. To control the insects that
transmit these viruses, Remove weeds that may harbor the viruses. Wash tools
used around infected plant.
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