Symptoms and Treatments. Diseased Plants Or Those With Insect Pests
Description
This section is from the book "The Complete Garden", by Albert D. Taylor. Also available from Amazon: The Complete Garden.
Symptoms and Treatments. Diseased Plants Or Those With Insect Pests
The following list shows in parallel columns (1) the symptoms which appear upon diseased plants or those with insect pests, (2) the cause and lastly (3) the indicated treatment.
Symptom | Cause | Treatment |
Scab | Bordeaux or lime-sulphur | |
Leaf spot | Fungus | Bordeaux, also gather and burn diseased leaves |
Leaf curl | Leaf curl fungus | Lime-sulphur or Bordeaux |
Freezing or rot fungus | Cut out and destroy diseased parts | |
Rust fungus | Bordeaux, also cut out cedar apples | |
Fungus | Bordeaux | |
Twig blight | Fungus | Lime-sulphur, also cut out and burn diseased parts |
Mildews | Mildew fungus | Sulphur dust, also burn leaves in autumn |
Fruit rot | Anthracnose fungus | Bordeaux |
Smut | Smut fungus | Bordeaux. |
Tip burn (leaves) | Too much water followed by hot weather | Watch soil conditions |
Scald | Freezing and thawing or fungus | Protect from winter sun and use Bordeaux |
Gum excretion | Borers | Protective wash and dig out borers |
Sawdust excretion | Borers | Protective wash |
Leaf discolouration of conifers | Red spider | Dry sulphur dust |
Bark discolouration | Scales | Lime-sulphur or kerosene emulsion |
Leaf curling | Aphids | Nicotine sulphate or soapsuds |
Wilt. | Cut worms | Paris green in molasses in bran |
Symptom | Cause | Treatment |
Defoliation | Bag worms or other caterpillars | Arsenate of lead and burn winter nests and egg masses |
Defoliation | Rose slugs | Arsenate of lead |
Defoliation | Leaf beetles | Arsenate of lead |
Defoliation | Thrips | Nicotine sulphate |
Leaf discolouration of rhododendrons | Lace-wing fly | Soap solution, I bar to 20 gallons. |
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