This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
Causes spots on leaves. See also under Fig.
Fig. Leaf-Spot (Cercospora bolleana) - Brown spots on leaves. Leaves turn yellow and drop off.
Spray with bordeaux mixture while leaves are young.
Serious stem disease, canker girdles the stems and kills parts above.
Prune off affected parts and burn.
Forms sub-circular spots.
Spray with bordeaux mixture. Fraxinus.
Swellings of midribs of leaves and petioles with orange rust spots on them.
Keep the common grass Spartina cynosuroides away from the trees.
Large brown spots with darker margin, numerous; soon the leaves wilt and die.
Spray with ammoniacal copper sulfate. Galanthus.
In place of the flower a shapeless mass is produced covered with brown mildew. Tubers decay also.
Remove all affected parts and burn. Use new soil thereafter.
See under Coffea. Same disease.
Lower leaves first attacked, become yellow and die. Disease gradually works upward.
Destroy affected plants.
Downy mildew of leaves.
Spray with bordeaux mixture.
Black smut pustules on corms.
Destroy affected corms. Use new soil.
Leaflets become covered with small black specks, causing some of them to turn yellow and fall.
A powdery mildew of the fruit and young growth of English varieties.
Spray with potassium sulfid, one ounce to two gallons of water, at intervals after leaves begin to unfold.
Brown circular spots on leaves, black, elongated, sunken pits on petioles, canes, etc., and on the berry a brown rot with shriveling and wrinkling.
Spray with bordeaux mixture, 4-4-50, before rains. Spray (1) when the third or fourth leaf unfolds; (2) as soon as the blossoms have fallen; (3) when berries are size of a pea; (4) about two weeks later. Two more applications if wet season.
White frost-like patches on under side of the leaf.
Same as Black-Rot. Grapefruit.
Large spots with dark margins. Leaves fall prematurely. On other species of Citrus also.
Destroy affected leaves. Guava.
Circular brown, decayed areas on fruit. Like apple bitter-rot.
None given. Hedera.
Rapid blackening of the etiolated portion of the leaf.
Remove and burn affected leaves and spray with bordeaux mixture. Helianthus.
Red rust pustules on leaves of most species of Helianthus.
No specific control measures worked out.
Large circular brownish blotches of scorched appearance, covered with minute black dots.
Cut off and burn affected leaves.
See under Freesia.
Indistinct brown spots with whitish centers.
Burn affected leaves.
Powdery mildew of leaves.
Dust with sulfur.
Large leaf-spot, causing premature dying of leaves.
Spraying with bordeaux mixture may be of value.
Catalogue of Diseases, continued.
All parts of plant show reddish brown pustules.
Eradicate mallow. Pick off diseased leaves and burn. Spray every week with bordeaux mixture, 4-3-50.
Deforming and swelling of leaves and stems, with white powdery surface growth.
Hardly important enough on the radish to necessitate control. Hyacinthus.
Serious pest in the Netherlands. Sap-tubes filled with yellow slime.
Destroy all affected plants.
Leaf-spot disease which become? serious at times.
Destroy diseased leaves as soon as noticed.
See under Cabbage.
Downy mildew of the leaves.
Remove affected leaves and spray with bordeauǽ mixture. Ipomoea.
Common rust spotting of leaves.
Destroy affected leaves.
See under Convolvulus.
First the leaves and flowers are much distorted and covered with black mold growth; later the bulb may be destroyed.
Eradicate diseased plants and grow in new soiL Juglans.
Brown leaf-spot, causing defoliation.
Collect and burn fallen leaves. Spray with bordeaux mixture while leaves are young.