21G SUMMARY OF CURRENT RESEARCHES RELATING TO 



The same writer, along with II. M. Lefroy, * undertook experiments 



with Mncor exitiosus on insects of the locust tribe, to see if the fungus 

 would attack these and so aid in reducing their numbers. Tin- 

 experiments all proved the futility of the attempt. The fungus did no 

 harm even when introduced as a wound-parasite into the bodies of tin- 

 locusts. 



W. Harris f has published a paper on vine culture, and adds an 

 account of the fungoid diseases which attack it. These are Sphacelous 

 ampelinum, Lee-stadia Bidwelli, Peronospora viticola, Uncinula spiralis, 

 Oidium Tucker i, and Glozosporium. fructigenum. Various remedies are 

 suggested for these diseases. 



P. HariotJ describes an Oidium of the genus Microsphcera that 

 infested an oak. Its development coincided with a prolonged time of 

 wind from the north-east. 



A. Maublanc § gives a study of the fungi that infest Conifers, with 

 a more detailed description of Fusicoccum abietinum, which attacks the 

 branches and kills the tips, or sometimes fastens on branches several 

 years old with equally serious results. The diseased portion is easily 

 recognised by the coloration of the affected part, which becomes a 

 blackish-brown. 



Economic Mycology. || — An account of various fungous diseases of 

 fruit trees which have done serious damage in the Kent orchards has 

 been published by B. S. Salmon. These are chiefly cherry leaf scorch 

 (Gnomonia ery thro stoma) and apple scab or black-spot (Fusicladium 

 dendriticum). Both of these have done great harm. Salmon recom- 

 mends spraying with Bordeaux mixture as an effective and proved remedy. 

 He notes also the first appearance in England of Urophlyctis Alfalfa on 

 lucerne plants. It forms galls on the crown of the plant, and completely 

 destroys it. He also redescribes the American gooseberry mildew 

 (Sphmrotheca mors-uvce), confined so far to a few localities in the Mid- 

 lands, but quite certain to spread rapidly if measures are not adopted to 

 stamp it out. In a second paper 1f he describes a serious disease of 

 potatoes that has appeared in England within the last ten years, and 

 forms black scabs on the tubers. It is due to a chytridiaceous fungus, 

 Oh/rysophlyctis endobiotka, which, as Salmon points out, has erroneously 

 been described by several writers as CEdomyces leproides, a totally different 

 fungus. Growers are specially warned against diseased seed. The fungus 

 has appeared so far chiefly in Scotland and the north of England, where 

 whole crops have been rendered useless. 



Pathogenic Spotting of Vine-shoots.** — Emil Molz has examined 

 the spots on the young stems of the vine, and finds they are due to a 



* Agric. Res. Inst. Pusa, Bull. No. 5 (1907) 5 pp. See also Ann. Mycol., v. 

 (1907) p. 451. 



t Bull. Jamaica Dept. Agric, v. (1907) pp. 1-26. See' also Bot. Centralbl., cv. 

 (1907) pp. 670-1. 



% Bull. Soc. Mycol. France, xxiii. (1907) pp. 157-9. 



§ Tom. cit., pp. 160-73 (6 rigs.). 



|| Report S.E. Agric. Coll. Wye., 1907, 58 pp. (26 pis.). 



•([ Leaflet, Black-scab or Warty Disease of Potatoes, S.E. Agric. Coll. Wye., Opp. 

 (6 pis.). 



** Centralbl. Bakt., xx. (1908) pp. 261-72 (2 pis. and 13 figs.). 



