64 HORTICULTURIST'S RULE-BOOK. 



Remedies. Bordeaux mixture or ammoniacal carbonate 

 of copper. 



Pea. MILDEW (Erysiphe Martii, L6v.). A whitish fungus 

 overspreading the foliage of peas, particularly the late 

 crops. 



Remedies. Try Bordeaux mixture or ammoniacal carbo- 

 nate of copper. 



Peach. BLACK-SPOT (Cladosporium carpophilum, Thm.). 

 Sooty-black scab-like patches upon the fruit, causing it to 

 crack deeply. Some varieties, as Hill's Chili, are very 

 liable to attack. 



Remedies. Probably spraying with dilute Bordeaux mix- 

 ture, or ammoniacal carbonate of copper, would be useful. 



BROWN-ROT. See under CHERRY. 



CURL, LEAF-CURL or 'TRENCHING" (Exoascus deformans, 

 Fuckl. ; written also Ascomyces deformans and Taphrina 

 deformans). The leaves become blistered and crumpled 

 early in the season and fall off. 



Remedies. Good culture, to enable the tree to put 

 forth new leaves, is to be recommended. Spray in spring, 

 before the buds open, with sulphate of copper or iron, and 

 follow with two or three applications of Bordeaux mixture. 



LEAF-RUST. See under PLUM. 



POWDERY MILDEW. See under APPLE. Spray with weak 

 Bordeaux mixture. Attacks both foliage and fruit of the 

 peach. 



ROOT-GALL and ROOT-KNOT. See entries under R, Chap. II. 



ROSETTE. An obscure southern disease of peach trees 

 and some kinds of plums, characterized by bunchy growths 

 containing very many rolled and yellowish leaves which 

 fall prematurely. The tree dies the first or second year. 

 There is no premature fruit, as in yellows. It is often ac- 

 companied by gummosis of the roots. The disease is 

 communicable by budding, and it may enter through the 

 roots. All affected trees should be exterminated. Known 

 in South Carolina, Georgia, Kansas, and Arkansas. 



ROT and BLIGHT (Monilia fructigena, Pers.). This is the 



