| Name |
Disease / Damage |
Control |
| Almond |
Leaf curl – swollen and malformed reddish blisters on leaves. |
Spray before buds burst with lime sulphur . Half pint in two gallons of water |
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| Aster |
Wilt – browning and withering of leaves from bottom of plant up. |
Take short cuttings in early spring, and plant out on fresh site in April. |
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| Begonia |
Bacterial wilt – brown spots on leaves and on stalks so that branches wilt and die . |
Cut off affected parts and spray with colloidal copper. |
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| Camellia |
Leaf blotch – greyish blotches in young rooted cuttings. |
cut off affected parts and spray with captan. |
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| Carnation |
Stem rot – Leaves turn yellow and wither. |
Destroy affected plants and use sterilized soil for the cuttings. |
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| Dahlia |
Leafy Gall – Cauliflower like growth of leaves. |
Destroy affected plants |
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| Delphinium |
Mildew |
Spray with Karathene |
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| Elm |
Mildew |
Spray with Karathene |
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| Freesia |
Leaves show pronounced striping |
Destroy infected stock and plant anew. |
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| Gardenia |
Canker |
Cut off any affected branches and spray with colloidal copper. |
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| Gladiolus |
Dry Rot – black lesions on corms. |
Dip in organo- mercurial dust before planting. Plant on a fresh site each season. |
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| Hydrangea |
Mildew |
Spray with Karathene |
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| Iris |
Ink |
On bulbous irises, black inky patches on bulbs should be burnt. |
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| Juniper |
Rust – swollen branches producing white horn like fruiting bodies containing brown spores. |
Cut off and burn. |
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| Lilac |
Blight – blackens young shoots and flowers causing them to wither and droop. |
Cut out affected shoots. |
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| Maple |
Tar Spot – black spots on leaves, but not usually serious. |
Burn old leaves. |
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| Oak |
Mildew – can be serious on young oaks. |
Spray with Karathene |
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| Rhododendron |
Rust – orange spots on underside of leaf- not very common. |
Spray with Thiram |
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| Spruce |
Rust – on needles. |
Since alternate host is rhododendron, do not grow them near these. |
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| Tulip |
Fire- scorching of leaves and potting on petals. Soil is contaminated. |
Treat soil with TCNB on planting. Choose good bulbs and spray with zineb or captan when young in foliage. |
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| Violet |
Smut – swollen blisters on shoots, and leaves contain black powdery spores. |
Spray Bordeaux mixture after destroying affected plants. |
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| Willow |
Canker – Brown spots on leaves. Small cankers on shoots. |
Cut away cankered wood and burn it. Paint over the cuts with tar. |
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| Zinnia |
Seedling Blight – seedlings die as a result of infected seed. |
Destroy. |
