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, 13:03, 20 December 2009
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| ===Pests and diseases=== | | ===Pests and diseases=== |
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| + | The two main diseases which infect asters are ''rust'' and ''powdery mildew'', both of which can be avoided by: |
| + | *making sure plants are well-spaced to allow for good air circulation; and |
| + | *watering plants at the roots so as to avoid the foliage becoming excessively wet. |
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| + | ''Rust'' can be easily identified by the orange pustules which form on the underside of the leaves. |
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| + | ''Powdery Mildew'' appears like a white sooty residue on the upper-side of the leaves, quickly causing defoliation. |
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| ==Species== | | ==Species== |