478 
At present the following facts may be considered to be 
established : — 
(1) . Thyridaria tarda is the cause of the “die-back” disease of the 
cacao plant and of the “ brown rot ” of cacao pods. Its Diplodia 
form is identical with the Diplodia which is known to cause a “die- 
back ” disease of Para rubber in the Straits Settlements and Federa- 
ted Malay States. The fungus also attacks mango, papaw, 
Caslilloa , rubber, sugarcane and Albizzia moluccana , and is considered 
to cause a root disease of coconut in Trinidad. 
(2) . It occurs in the West Indies, tropical America, tropical 
Africa, the Philippines, Ceylon (?), Java. Samoa, St. Thome 
and the Malay Peninsula. 
(3) . It is a wound parasite, and the disease is caused by the 
fungus when it is in its Diplodia stage. The Diplodia 
condition is capable of reproducing itself and passes on 
the dead parts into the ascigerous {Thyridaria) condition 
some time after they are dead. 
The following references are appended 
1892. Patouillard.- Bulletin de la Societe myeologique dc 
France, p. 136. 
1894. Prilleux & Delacroix. — Bulletin de la Societe mycolo- 
gique de France, p. 165, t.vi, fig c. 
1896. Hennings. — F ungi Camerunenses ; Engler Bot. Jahrb., 
xxii, p. 172. 
1901. Howard. — W est India Bulletin, Vol. II, p.. 203. 
1006. Appel & Laurert. — Arb. aus der Kaiserl. Biol. Anst, 
fur Land and Fortswirts, p. 147. 1906. 
1909. Griffon & Maublanc.- Bulletin de la Societe Mycolo- 
gique de France, xxv, p. 51. 
1910. P etch.— Circulars and Agricultural Journal, Royal 
Botanic Gardens, Ceylon, iv, No. 23. 
A BACTERIAL DISEASE OF POTATO AND 
TOMATO. 
By Keith Bancroft, b.a. 
Assistant Mycologist, F. M. R 
Specimens of putato plants have been recently received from Tab 
ping (Perakl exhibiting the well-known “ bacteriosis ” caused by Bacil- 
lus Solanacearum , E. Smith. The same disease has been known for two 
or three years to occur in Kuala Lumpur on tomato plants cultivated 
in vegetable gardens. These two crop? are but little cultivated in the 
