Potential Problems with Dahlias:
Early in growing season:
Aphids
 |
| Aphid |
Cause: Aphids are a well known pest insect that can
quickly colonise the soft tissue parts of your plant. They damage and weaken
the plant by sucking the sap out.
Symptoms: Clusters of these small insects are readily
identifiable, normally at the plants tips or on the underside of their leaves.
In severe cases, the infected parts can begin to wither due to the quantity of
sap being removed from that area.
Treatment: There are many chemical treatments available including a number of
organic, but all of these must be applied at the first signs of infection to
achieve the best results.
Slugs
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| Slug |
Cause: Slugs are the number 1 garden pest, and are
particularly active in the spring and over wet summers.
Cause:Slugs are
particulary drawn to new growth creating irregular holes in and along the sides
of the leaves.
Treatments: There are a number of treatments both
chemical and organic.
Mid to late summer:
Spider Mites
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| Mite |
Cause: Spider mites thrive in warm or hot, dry weather. They survive over the winter on a number of plants, including many evergreens.
Symptoms: Dahlias infested with mites often have shriveled tops, distorted leaves, curling leaves and dark foliage with light-colored streaks.
Treatments: Treat spider mites with neem oil; warm oil and spray underside of leaves.
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