Rose, Spinach. 363 



breeding, keep the light lands in which they breed under 

 thorough cultivation, and especially never seed them down." l 



Rose Leaf-hopper (Typhlocyba Rosce, Harris). Description. 

 These insects are generally found upon the under side of the 

 leaves, but when disturbed they move or fly rapidly from place 

 to place. They live upon the juices of the plants, and are fre- 

 quently serious. The mature insect is less than a fourth of an 

 inch in length ; its wing covers are nearly transparent, and the 

 body is yellowish- white. There are several broods. The af- 

 fected leaves show irregular, white markings on their upper 

 surface, and in this manner the presence of the pest may easily 

 be observed. 



Treatment. The same remedies mentioned under CURRANT 

 GREEX-LEAF-HOPPER may also be employed against this insect. 



SHADE TREES; SHRUBS. 



There are many fungi and insects attacking other plants 

 than those mentioned individually in this work, but it is 

 scarcely practicable to describe each in detail. The reader is 

 referred to Chapter VI., in which general directions will be 

 found ; it is hoped these will serve as guides in the treatment 

 of any trouble which it is desired to overcome. 



SPINACH. 



Anthracnose (ColletotricJium Spinacece, E. & H.). Description. 

 The affected parts are generally circular in form; they soon 

 produce brown pustules, and the color of the spot gradually 

 changes to gray. The fungus spreads with great rapidity, 

 attacking the old and the young leaves indiscriminately. 



Mildew (Peronospora effiisa, Rabenh.). Description. Spin- 

 ach grown under glass is frequently attacked by this fungus. 

 The diseased foliage shows " gray, slightly violet patches of a 

 velvety texture upon the under side of the leaves, while from 

 the upper side they have a pale yellow shade due to the loss of 

 the green color." 2 Dr. Halsted has also described three other 

 fungous diseases of spinach, viz. black mold, leaf blight, and 



Bailey, Horticulturist' 1 s Rule-Book, 1895, 42. 



* Halsted, N. J. Agric. Exp. Sta. 1890, July, Bull. 70, 5. 



