252 PATHOLOGY [BoT. Absts., Vol. IX, 



Gulielmae, dedicated to Miss Lister, is described, differing from L. violaceum in possessing 

 smaller sporangia and larger spores. The genus Diderma is enriched by the addition of 2 

 new varieties, — D. simplex Schroet var. echinulatum var. nov. and D. montanumv&r.roseum 

 var. nov. — Charles Drechsler. 



PALEOBOTANY AND EVOLUTIONARY HISTORY 



Edward W. Berry, Editor 

 (See in this issue Entries 1374, 1497) 



PATHOLOGY 



G. H. Coons, Editor 

 C. W. Bennett, Assistant Editor 



(See also in this issue Entries 1143, 1147, 1266, 1419, 1421, 1435, 1471, 1498, 1517, 1617, 1641, 



1642 j 



PLANT DISEASE SURVEY (REPORTS OF DISEASE OCCURRENCE AND SEVERITY) 



1542. Anonymous. Mosaic or mottling disease of sugar-cane. Agric. News [Barbados] 

 19 : 345. 1920. — A communication to the local press from the Director of Agriculture, Barbados, 

 is noted announcing the presence of the disease in that Colony. Canes found in St. Lucia 

 and thought to be affected, proved on closer examination to be free from the disease though 

 presenting a similar appearance. — J. S. Dash. 



1543. Howard, W. L. An old disease in a new place. Proc. Amer. Soc. Hort. Sci. 17: 

 102-104. 1920 [1921]. — Due to the fact that the regions of California in which stone fruits are 

 grown are sections without summer rains, brown rot {Sclerotinia cinerea) was practically 

 unknown. During the past 5 years considerable damage has been done but almost exclu- 

 sively in the cool, moist region along the coast or in the vicinity of San Francisco Bay. The 

 disease does most damage where frost inj ury is likely to occur. The atmosphere is quite humid 

 in this region but why the fungus seems to have become adapted to spots where low tempera- 

 ture prevails around blooming time, rather than in warm places, is not clear. It was found 

 that the disease could be controlled on apricots to within 4 or 5 per cent by a single applica- 

 tion of either lime-sulphur (1 to 10), dry lime-sulphur (12 pounds to 50 gallons), or Bordeaux 

 mixture (4-5-50), when the trees were sprayed after the fruit buds were noticeably swollen. 

 Spraying after the trees are passing out of bloom does very little good, and spraying before the 

 buds swell is equally unprofitable. Apparently the disease attacks the trees when they are 

 in full bloom. Crude oil emulsion, which is commonly used in winter against brown apri- 

 cot scale, gives promise of being an effective remedy where spraying is done after the buds be- 

 gin to swell. A distillate emulsion, lime whitewash, and dry sulphur each have failed to 

 control. Self-boiled lime-sulphur applied when the apricots were half grown had no effect 

 upon the disease but completely checked the development of the fruit. Brown rot is not a 

 serious problem with the ripe fruit, apparently because of the dryness of the air at the ripening 

 period. The disease also attacks peach and plum but usually not seriously; in one locality 

 it became serious on peaches at ripening time. — H . W. Richey. 



1544. Lee, H. A., and F. B. Serrano. Banana wilt in the Philippines. Philippine 

 Agric. Rev. 13: 128-129. 1920. — This disease, caused by Fusarium sp., is recorded from the 

 Philippines, but the authors note that a number of local varieties of the banana are resistant 

 or immune. — E. D. Merrill. 



1545. Lee, H. A., and H. S. Yates. The distribution of pink disease. Philippine Agric. 

 Rev. 13: 115-116. 1920. — A short note is presented indicating that this disease of citrus hosts, 

 caused by Corticium salmonicolor , was introduced into the Philippines earlier than the authors 

 formerly supposed. — E. D. Merrill. 



