PEACH 



appear late in autumn, after the k-iives have fallen, or 



in spring before normal growth begins. They are often 



first seen upon the ends of watersprouts. This "tip" 



growth is sometimes little pronounced, and then only a 



practiced eve will detect 



"■",-' iT , It. The third mark of 



the disease is the push- 



'V ing out of slender stiff- 



'"'t leaved yellowish shoots 



~ from the body of the 



'^ tree or the sides of the 



-=-^^ large limbs (Fig. 1076). 



In pronounced cases, or 



w hen the tree is about 



to die, these shoots may 



branch into close bunchy 



tufts. These symp- 



■j^ toms are frequently 



wholly absent in this 



state throughout the en- 



1 tree tire course of the dis- 



PEACH 



1231 



The Michigan • 



-forn 



In its liurtl stage, the yellows is marked by small and 

 slender growth of all new wood, small, narrow, yellow 

 or redtlish foliage, and occasionally by a great pro- 

 fusion of slender and branchy growths in the center of 

 the tree. As a rule, yellows trees die in five or six 

 years from the first visible attack, sometimes sooner. 

 The yellow and stunted condition following neglect or 

 the work of borers — both of the common borer and the 

 pin-hole borer— is often mistaken for yellows. Ex- 

 termination of all affected trees — root and branch — is 

 the only method of keeiiiug the disease at bay. This 

 work should be d,.ne vigorously and thoroughly. The 

 entire coniiiiuiiity shuiihl unite. Trees may be set in 

 the places fruiu whiih the diseased trees are removed, 

 without fear of coutamiu:itiou. The cause of the disease 

 is wholly unknown. Almost every ascribed cause has 

 been disproved upon careful investigation. Even when 

 the cause shall have been discovered, the remedy will 

 probably remain the same- extermination. The disease 

 has no uniform preference tor varieties, soils, climate, 

 nor methods of propagation or cultivation. No fertiliza- 

 tion of the soil will cure the disease or check its spread. 

 The disease sometimes attacks the almond, apricot, and 

 Japanese plum. Yrll.uvs has been recognized for 



about a century. It i^ i iiliar tu North America, and 



is generally distrilniii.! ihnih mI' tlie Carolinas and east 

 of the Mississippi. I'.'V iiidr >|.iciflc information on 

 Peach yellows, consult tlif writings of E. F. Smith, 

 published by the U. S. Dept. of Agric. 



Rosette is a very serious disease of Peach trees in 

 the southern states, characterized by dense rosettes 

 or bunches of foliage on the young shoots. It soon 



^^k^ 



preference for some varieties, particularly those with 

 large, soft and dark-colored leaves. It is also influ- 

 enced greatly by the season, although it is rarely wholly 

 absent. A moderate attack does not perceptibly injure 

 trees in full vigor. In many cases, however, the 

 larger part of the leaves fall from the tree in June, and 

 the fruit, deprived of nourishment, may also fall. Leaf 

 curl, the curculio and lack of pollination are the chief 

 causes of the "June drop" of Peaches. The leaves 

 "curl," or become puckered, early in the season, and 

 soon die. Experiments have demonstrated that a thor- 

 ough spraying with full-strength Bordeaux mixture just 

 before the buds swell in spring is very nearly a spe- 

 cific. If long-continued wet weather follows, it may be 

 advisable to sprav again, when the petals have fallen, 

 with B.iid.aux Hiixturc, consisting ..f 2 i...im.ls of cop- 

 per sullat.'. 2 ]. Mini. Is uf .|iiii-k-Iiiii.-. and .'ill gallons of 



and ai\ , tliis >,■ 1 spraying will l.c uiiiircissary. For 



full account of iVach curl, see Newton B. Pierce, Bull. 

 20, Div. Veg. Phys. and Path., U. 8. Dept. Agric, 1900 

 (pp. 204). 



"Little Peach " is a recent disease which has appeared 

 in Michie-an and western New York. It is ordinarily 

 charari.-nzid liy tlie Peaches remaining small and hard, 

 the tri-is li.viii- \ iu'or and the leaves becoming small. 

 AftiT a fiiiir tin- tree dies. It seems to spread when 

 once istal.ii^lii M I'l an orcliard. The cause of the difil- 



young Michigan Peach orchard. 



ome it is thought to be 

 have associated it with 

 ■tility in the soil, overbearing 

 • -s.."s. It has every appear- 

 i-iiuct disease. No remedy 

 I I vised to pull out the trees 

 mI yellows. Some growers 

 iiue'the disease partially or 

 1 of nitrogenous fertilizers 

 im to tillage. All these questions, 

 to be demonstrated. 



Peacti I 



Eastern Maryland. 



proves fatal. The cause is unknown. The remedy is 

 to exterminate the trees as soon as the disease appears. 

 The leaf curl has been the subject of more concern 

 amongst Peach-growers during the past few years than 

 any other disease, except the yellows. It has a decided 



. 1 1 i >oi-der. 

 ! .;i nit have 

 iinething 

 1 il,.. -li.H.i, ,, ,1,10 to the 

 1 nit to rut. The decayed 

 hang on the tree, and be- 

 tion for the coming year. 

 1 tie found in orchards all 

 IV .as, s. a \.ai- following 



- !,.■ iii.i-t alani.laut in the 



- ..11.11 Ivill- ill.' twigs that 



-am.' tiiui;!.- attacks the 



Ex|.. ■ ^' : 11. f.iuud th: 



d,-~ti . .' IS in spring, and this injury may 



pa-- •.. - .if frost. He also found that thor- 



ougli -pi 1} iii_- •. iih copper fungicides greatly reduced 

 the injur}-. His advice for the treatment of the dis- 

 ease is as" follows: (1) Gather and burn all mummified 

 fruit. (2) Early in the spring, before the fruit-buds 



