160 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



remained, were the prominent symptoms. In every case a species 

 of Fusarium was found in the diseased portion and cultivated. Healthy 

 plants were inoculated, and the disease was reproduced. The name 

 Fusarium violae, sp. nov., is proposed for the fungus. It was noticed 

 that plants growing in ground recently manured with fresh farmyard 

 manure were the only ones to be affected. — F. J. C. 



Parasitism displayed by Insect Enemies of Weevils, On 



some Phases of. By W. D. Pierce {Jour. Econ, Entom. iii. pp. 451- 

 8; Dec. 1910). — The author enumerates some phases of superparasitism 

 additional to those mentioned by Mr. Fiske in a previous p^per (see 

 JouENAL E.H.S. xxxvii. p. 646). Owing to the numerous cases 

 of superparasitism, etc., " it is seldom possible for parasitism to reach 

 much above 45 to 50 per cent, of the tot^al number of weevils in the 

 field. '^—.F. J. C, 



Peach, A Bacterial disease of the. By J. B. Eover (Mycologia, 

 i. p. 23 ; 1909). — A shot-hole disease of the peach is described and 

 attributed to Bacterium pruni. The attack is characterized by some- 

 what angular, purplish-brown spots i to ^ inch in diameter, sometimes 

 confluent. On the leaves the diseased tissues dry and fall out. Leaves 

 drop prematurely, and the disease is worst in ill-pruned and ill-culti- 

 vated orchards. The organism was isolated, and infection experiments 

 resulting in the disease were carried out by spraying leaves with the 

 culture suspended in water. Shoots and fruits are also apparently 

 attacked. The bark of the young shoots shows purplish-black slightly 

 sunken areas | to j\ inch wide, extending two or three inches along the 

 stem, sometimes girdling it. A small purplish spot occurs on the 

 fruit, over which the skin soon cracks. The spots are small but 

 numerous. — F. J. C. 



Peach and Orange, A Gum-inducing- Diplodia of. By H. S. 



Fawcett and O. F. Berger {Mycologia, iii. p. 151; 1911). — A species 

 of Diplodia, probably D. natalensis Evans, was isolated from peach 

 and orange trees in Florida, and, inoculated in healthy ones, produced 

 gumming. The inoculations were made either in cuts or on young 

 twigs. Attempts to inoculate through uninjured cork were unsuccessful. 

 The fungus is known also in South Africa, where it produces decay in 

 lemons and other citrus fruits. — F. J. C. 



Peach, Bud Variation in. By Ed. Griffon {Rev. Hort. pp. 452-3; 

 Oct. 1, 1911). — Eeport of two instances where the peach grafted on 

 the almond has produced almond growths by bud variation when very 

 old on the upper branches far removed from the graft. Such growths 

 bore both true almond flowers and true almonds, but the latter fell 

 when of small size. — C. T. D. 



Peach in Colorado, Some Insects and Mites attacking' the 

 By George P. Weldon. Two Plant Lice of the Peach. By 0. P. 



Gillette and George P. Weldon {U.S.A. Ei'p. Sta., Colo., Bull. 169; 



