86 SUMMARY OF CUERBNT RESBAECHES RELATING TO 



strands or sheets of black or red mycelium. The conidial form is a red 

 stalk with a head of spores ; the peritkecia are small dark red bodies. 



A second paper* deals with root diseases of Acacia decurrms, a tree 

 that is "planted in up-country districts as a wind-break in tea." One 

 of these diseases is caused by Armillaria fuscipes, which forms sheets of 

 red or white mycelium under the bark ; the fructification does not 

 appear till the tree has been dead for some time. The habit of the 

 fungus is very like that of A. mellea. 



Another disease also described is caused by Fomes australis, one of 

 the bracket fungi. Infection probably takes place through wounds, but 

 the fungus can also spread from tree to tree by the roots. The fungus 

 is of slow growth, and can be rooted out if taken in time. 



Brown root disease f due to Hymenochsete noxia, is characterized by 

 a thin dark brown crust adhering to the base of the stem. It attacks a 

 considerable number of different trees, and Petch records its appearance 

 on several new hosts — camphor, cacao, cinnamon, etc. — he recommends 

 burning the diseased trees and roots. A somewhat similar disease 

 (H. rigidula) is found in the jungle also on a number of trees. \ 



Information is given J by the Board of Agriculture as to the appear- 

 ance of powdery mildew of peach and cherry. It begins as small white 

 patches on both surfaces of the leaves, and on the young twigs. In the 

 case of peaches it does great damage, as it attacks the young fruit. It 

 is recommended to spray the trees with half-strength Bordeaux mixture 

 when the disease appears. 



A leaflet § has been issued dealing with Spongospora scabies, corky 

 scab of potatoes. Experiments in Western Ireland have proved that lime 

 in the soil rather aids the disease. Care should be taken to plant seed 

 free from the parasitic organism, and also to see that the clean tubers have 

 not been in contact with any that are diseased. Soaking in formalin 

 will kill the parasite if it is only in the superficial cells of the potato. 



L. Pavarino || found that in the leaves of plants attacked by Fxoascus 

 the temperature rose higher than in healthy leaves, and he considers 

 this phenomenon as a local fever induced by the action of the fungus 

 poison. 



F. B. Bubakfhas detected on fir-needles a Pyrenoinycete with 

 niany-spored asci, which he names Rehmidlopsis bohemica g. et sp. n., 

 and the pycnidial form, also a new discovery, Phoma bohemica. 



A disease of pine-needles** has been observed by E. Munch and 

 C. v. Tubeuf. The trees looked as if they were suffering from smoke, 

 an impossibility in the circumstances. A fungus, Hendersonia acicola 

 sp. n., was found on the decaying leaves, and was probably the cause of 

 the trouble. 



* Oirc. and Agric. Journ. Roy. Bot. Gard. Ceylon, v. No. 10 (1910) pp. 89-94 

 (3 pis.). t Tom. cit. No. 6, pp. 47-56 (2 pis). 



% Journ. Board Agric. xvii. (1910) pp. G52-3 (1 pi.). 

 § Board of Agric. and Fish. Leaflet N. 232 (1910) 4 pp. (1 fig.). 

 jl Riv. Pat. Veg. iv. (1909) pp. 3-4. See also Centralbl. Bakt., xxviii. (1910) 

 p. 274. 



f Naturw. Zeitschr. Forst.-Landw., viii. (1910) pp. 313-20 (5 figs.). See also 

 Ann. Mycol., viii. (1910) p. 572. 



** Tom cit., pp. 39-44. See also Ann. Mycol., viii. (1910) pp. 577-8. 



