70 SUMMAlty OF CUKliENT KESEAEGUES KELATING TO 



Univ. Circular, 1917, 3, 193-4). The preliminary work so far has been 

 in the observation of cultures of Pythiacystis citropUhora, which attacks 

 the trunk and the fruit of the lemon tree. Growth was most vigorous 

 between 10 to 20° C, the rate being doubled, from 20° to 28° it 

 increased 25 p.c, at 33"^ the rate was nearly the same as at 10°. 



A. L. 8. 



Fungi and Disease in Plants. — A text-book of fungi, with special 

 reference to disease of plants in India, has been published by E. J. 

 Butler (Thacker, Spink and Co., Calcutta and Simla, 1918, 547 pp., 

 206 figs.). The first part deals with a general description of fungi and 

 their relation to other organisms. In the second pirt are described the 

 more prevalent diseases that affect economic plants in India, from 

 cereals to rubber. Remedies for these diseases are suggested. Butler 

 states that in such a large country as India the diseases are unavoidably 

 numerous, and many of them are endemic. Cereals and pulse crops 

 receive necessarily much attention. Root-crops and oil- seeds, dye, drug 

 and spice crops, including tobacco, have each their parasites. Tea and 

 ruliber are also important Indian plants, and are subject to severe 

 attacks. A. L. S. 



Sterigmatocystis Smut of Figs. — Robert W. Hodgson {Phyto- 

 'patlioloyy, 1918, 8, 545-0) has published an account of the trouble 

 caused to fruit merchants by the disfigurement and injury to figs. When 

 opened the figs show streaks of a blackish gummy nature mainly caused 

 by a Sterigmatocystis. A. L. S. 



Cacao Disease. — The disease of cacao-beans due to Phytophthora. 

 Faberi has been studied in Samoa by Ernst Dejiandt (Zeitschr. 

 Pfianzenkr., 1918, 28, 241-391, 2 pis., 13 figs.). After along account 

 of the disease he gives methods of treatment. He then gives a short 

 description of the disease on the fruits of Hevea. Associated with the 

 Phyto'phthora he found Fmarium sarnoense and another species un- 

 described, which also gave rise to cankers. A. L. S. 



Root-rots of Ginseng. — C. !>. Zinssmeister {Phytopathology, 191H, 

 8, 557-71, 8 figs.) has investigated diseased roots of Ginseng {Panax 

 qvinquefoiinm). The disease has been known as a root-rust, but the 

 author has traced it to the Ramularia fungus. He has examined the 

 tissues, in which he has traced the course of the disease, and he has made 

 cultures and inoculations. He describes three new species of Ramularia 

 which he has isolated. A. L. S. 



Pink Disease of Plantation Rubber.— This disease has been 

 abundant in Malayan Estates since 1912, and F. T. Brooks and A. 

 Sjiari'LKS {Ann. Ap/i. Biol., 1915, 2, 58-80, 11 figs.) have investigated 

 its distribution, hosts, etc. It is due to the fungus Corticium. salmonicolor, 

 which may exist in a sterile condition. It affects both the bark and the 

 wood, inducing tyloses in the vessels of the latter. Instruction is given 

 as to treatment. A. L. S. 



