FUNGAL AND
BACTERIAL LEAF DISEASES |
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There are numerous fungal leaf diseases and a few bacterial
ones that do damage to leaves through the course of the
season. These are seen as discolored spots or larger areas
which eventually turn brown. Most of these don't start showing
up until summer, but Botrytis can begin early in the spring.
These only damage the leaves and don't harm the plant unless
leaf damage is so severe that the plant can't grow. |
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Treatment for these is much the same for all of them. Fungicides
come in two types - the barrier type that prevents spores from
entering the leaves and systemics that work inside the plant. Most
of these problems can be stopped by spraying a barrier type of
fungicide like copper or Daconil. Phyton works well too. Regular
spraying will be necessary to get through the whole season with no
damage.
An article on Bacterial Leaf Streak can be found HERE.
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In the
Garden: Hosta leaves can be kept free of
these diseases by spraying a barrier fungicide. If botrytis is not a
problem, spraying can begin when the first symptoms are seen. |
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In the
Nursery: To keep nursery stock clean there are a number of
professional fungicides like the newer Mural that should work very
well. Phyton has proven to be very effective as well. |
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