508 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Mch. 5, 1910 ; 1 fig., 4 plates). — Brown-rot allects llie fruit of tlie peach, [ 

 causing it to decay on tlie trees or en route to market. It is due to 

 the fungus Sclerotinia fmctigena (P.) Sclirot, wliich is often called 

 Monilia, the name given to the summer stage of the fungus before the 

 perfect form was known. 



This fungus has for years been recognized as the most destructive 

 disease of stone fruits; it also attacks the apple, pear, and quince, but 

 in a lesser degree. It occurs in Great Britain, Germany, France, 

 Austria, and Belgium. 



Peach scab, or black-spot, is caused by the fungus Cladosporhm \ 

 carpophilum Tliiim. This disease spoils the appearance of the fruit, 

 and the large cracks which occur in severe cases open the way for 

 brown -rot. 



The bulletin describes experiments in spraying and gives a summary 

 of the season's work (from 1907 to 1909 inclusive), with recommenda- 

 tions for the treatment of orchards. — V. G.J. 



Peach Fruit Spot, Sppaying- for. By A. B. Cordley and 0. C 

 Gate {U.S.A. Exp. Stn. Oregon, Bull 106, Aug. 1909; 8 figs.).— The ! 

 results so far obtained indicate that one of the most important steps in 

 controlling this disease is to spray in fall with some good fungicide. 



A more extended account will be published when the work has been 

 completed, but a brief note is given so that growers may know what 

 has already been accomplished and thus be prepared to spray at the 

 proper time. — V. G. J. 



Peach Varieties In Oklahoma. By 0. M. Moms {U.S.A. 

 Exp. Stn. OUaJioma, 18th Report, pp. 93-98; 1908-1909).— 

 Seedling trees are more hardy and live longer than budded trees, 

 but the quality, size, and quantity of fruit is more satisfactory in 

 budded trees. The weather conditions are discussed, and full notes 

 given as to the behaviour of some 40 varieties tested. — G. F. S.-E. 



Pear-leaf Blister Mite {Phytoptus pyH). By Pierre Passy 

 (La Pom. Franc; July 1910; pp. 212-220). — These mites in autumn 

 iiide among the scales of the buds and in the crevices of the bark and 

 clefts of the small branches. Towards spring they pierce the small 

 leaves of the buds and enter the parenchyma of the leaf, moving freely 

 in the empty spaces formed in the thickness of the leaf. Soon they 

 lay their eggs, the young larvae grow quickly, absorbing the juice of 

 the leaf, the mites quit the leaves and go to the extremities of the 

 young shoots and pierce the small unexpanded leaves. There are, 

 therefore, at least two invasions yearly, those of spring and autumn. 

 In spring nearly all the leaves of the same bud are attacked, numerous 

 blotches being distributed aU over the leaves. In the autumn fewer 

 leaves of the same bud are attacked, and in these the blotches are 

 chiefly along two parallel lines. At this autumn attack the larva of the 

 tly Cecidomyia pyri is also often at work preventing the expansion of the 

 terminal leaves. On the approach of the fa]l of the leaf the Phytoptus 



