290 The Spraying of Plants. 



if possible. Tobacco dust or liquor, or some of the many liquid 

 commercial insecticides, will prove of value if properly applied. 

 Whale-oil soap has also been recommended. 



DAHLIA. 



Four-lined Plant-bug. See under CURRANT. 

 Green Lettuce- worm. See under LETTUCE. 



EGGPLANT. 

 FUNGOUS DISEASES. 



Anthracnose (Glceosporium Melongenea, E. & Hals.). De- 

 scription. This fungus appears to attack the fruit more 

 seriously than the other parts of eggplants. It causes the 

 formation of shallow pits in which very small pink blotches 

 appear. The disease has as yet not caused much loss, and no 

 attempts directed towards its treatment appear to have been 

 made. It is probable that the remedies recommended for the 

 leaf spot will be sufficient for checking the anthracnose. 



Leaf Spot (Pliyllosticta hortorum, Speg.). Description. When 

 this fungus attacks the foliage of eggplants it causes the leaf 

 tissue to turn brown, and later it becomes dry and brittle. 

 These parts may in a short time fall from the leaf, forming 

 openings of varying sizes. When several of such areas are 

 situated near each other, large portions of the leaf may be 

 affected, and it frequently happens that the plants lose nearly 

 all their foliage in this manner. The fruit appears to be 

 affected by the same fungus. Here it appears as a dark dis- 

 coloration which causes the fruit to rot, and consequently 

 renders it worthless for market. 



Treatment. If the leaf-spot fungus is feared, the young 

 plants should be sprayed with the Bordeaux mixture as soon 

 as they have become established in the field. Applications 

 should be repeated at intervals of two or three weeks. W T hen 

 the fruit is approaching maturity, a clear fungicide should be 

 applied in place of the Bordeaux mixture, to avoid staining the 

 fruit. 



INSECT ENEMIES. 



Potato-beetle. See under POTATO,. 



