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SUMMARY OF CURRENT RESEARCHES RELATING TO 
New Identifications of Mycorrhizal Fungi. — Beniamino Peyronel 
{Bull. Soc. Mycol. France , 1921, 37, 143-6). The author has succeeded 
in tracing the connexion between the mycorrhiza of forest trees and 
several well-known Hymenomycetes. For five forest trees he finds 
eighteen fungi that provide the mycorrhiza. He gives an account of 
the way in which he identifies and connects up the fungus with the 
mycelium in the tree roots. A. L. S. 
Decaying of Mulberry Buds. — Giovanni Briosi and Rodolfo 
Farnati {Atti 1st. Bot. Univ. Pavia , 1920, 17, 185-201, 14 pis.). 
The deterioration of the buds has been considered as due to weather 
conditions, etc., but the authors have proved by observation and experi- 
ment that the trouble is due to a fungus, Fusarium lateritium. They 
found associated with Fusarium the Pyrenomycetous fungus Gibberella 
moricola , and were able to prove by cultural growths that it was the 
perfect stage of the Fusarium. Full descriptions are given of the 
effect of the fungus on the tissues of the host. The authors recommend 
the careful removal and destruction of all affected parts of the tree. 
A. L. S. 
Observations in Malaya on Bud-rot of Coco-nuts. — A. Sharples 
and J. Lambourne {Ann. Bot., 1922, 36, 55-70, 6 pis.). The writers 
recount the various theories as to the origin of Bud-rot, the disease 
having been attributed either to bacteria or to Phytophthora. From 
their own experiments they were unable to isolate a fungus, but three 
organisms appeared in the cultures, one producing a deep red pigment, 
the second a lemon-coloured growth, the third pure white. They 
consider that Bud-rot may be due to different organisms in different 
localities. A. L. S. 
Alternaria Spots of Tomatoes in California. — Bruce Douglas 
{Phytopathology, 1922, 12, 146-8, 1 fig.). The spotting occurs soon 
after the first autumn rains or fogs. The spots remain firm and dry 
until secondary fungi and bacteria enter, when the fruit goes down with 
a watery decay. Leaves and fruits were inoculated with the spores, and 
it was found that while some kinds became diseased others were only 
slightly affected or entirely immune. A. L. S. 
New Disease of Cacao. — Malusio Turconi {Atti 1st. Bot. Pavia , 
1920, 17, 1-8, 1 pi.). The cocoa plant, Theobroma Cacao , belonged 
originally to tropical America, but it grows more or Jess successfully in 
the botanical gardens at Pavia, and it was on one of the plants there 
that the disease was noted. The leaves were affected, the fungus that 
caused the disease growing on the leaves and destroying the tissues. 
The writer gives full descriptions and finally the diagnosis of three 
fungi : Physalospora Theombromse sp. n., and associated with it 
Stachylidium Theobromae sp. n. and Helminthosporium Theobromae sp. n. 
A. L. S. 
Sporotricose of Peaches. — Gino Pollacci {Atti 1st. Bot. Pavia, 
1920, 17, 203-8, 1 pi.). An investigation of white spots which dis- 
figured peaches at different stages of development was undertaken by 
Pollacci. He found they were due to a minute white fungus, Sporo- 
