Downy Mildew
(fungus - Peronospora trifoliorum): This disease is often seen in the spring
when cool, moist weather exists. It may cause serious reductions in yield. The
fungus, which causes new growth to turn yellow and new leaves to be twisted, infects
that plant systemically for life and can remain in soil on old plants for several
years. A white moldy growth is usually present on the underside of diseased leaves.
Where severe, cut early to save as many leaves as possible. Prevention is possible
by using clean, certified, and treated seed to establish new stands. Practice
long rotations when the fungus is present.
