Pomoxa College Jockxal of Economic Botaxy 



county » Florida *. Dr. Martin found it in 1886 at Green Cove Spring. It 

 does not seem to be widespread nor at present of much importance, bat is 

 recorded here that attention might be called to it. so that its nature might 

 be known and its progress watched." — Jr. of MycoL. VII. ; p. 35. 1891. 



"Professor Hume has collected specimens of the disease in several places 

 in Florida. He also mentions that some pomelo seedlings lost nearly all 

 of their leaves as a result of the attack of the fungus in question." "Miss 

 Stooeman found tha: this fungus attacked orange trees in conservatories.'* 

 "Penrig mentioned this fungus as being destructive to citrus plants, atta^wg 

 the foliage mainly." "McAIpine found this fungus on the orange near 

 Melbourne. Australia, in 1892. and in 1898 it was found by Tryon to be 

 destructive to :he lemon leaves in Queensland." "In Brazil it seems to be 

 quite generally distributed. Xoack found it especially severe at Sao Paulo, 

 where it was recognized not on'.y on the leaves, but also on the smaller twigs, 

 latter were killed as far as the fungus penetrated, showing a very derided 

 demarcation between the sound and diseased areas." U. S- Dept. AgrcL BuJL 

 Xo. 5JL 1*H. p. 10. 



"Tms disease on the fruit was first observed by the writer in the autumn 

 of 1901. bat attracted little attention at that time, as the damage was slight, 

 only a few specimens of the diseased fruit having been observed in a single 

 grove. Sirrce that rime the disease, in the grove where it was first observed, 

 has increased re such an extent that the trees, on winch it was first n"rired, 

 yielded a very small proportion of sound fruit during the present <«<^i 

 The disease has probabo. been at work for a considerable length of ti— > 

 and as is usual in such cases, attracted little attention until it became serious. 

 The loss —ring me past season in two or three instances has a n m « * » «| to 

 from ire hua dred to a thrusand dollars in a single grove." 



"Freer, ecr present knowledge of this disease it appears to be on the increase 

 and we are probably justified in predicting that it has not yet reached its 

 worst. The disease is in all likefihood an introduced one and k may be 

 looked to. to attack the sweet orange in addition to the lemon, time and pome > 

 It necueuriy occurs upon leaves, twigs and br anch e s of the sweet orange, 

 and on one occasion sweet orange fruit on one of the fruit stands m I 

 City. Florida, were observed, covered by lessons < diseased spots) caned by 

 this same fungus C.\~*tctrickmm ^f*fW«; H. H. Hone. Fb- Exp. 

 Sta_ Bel Xo. 74> pp. 161-162. Aug, 1904. 



In view of the fact that the disease is thought to do damage oaiy at a 

 iamr or moist ciimare. k might be intei e ati n g to state that the writer re- 

 cently spent a week at the Salt River Valley. Arizona, looking over the extras 

 cchards and especially as to the distribution and liwif caused by wither- 

 up. Of course k was at a damp period of the year, bat cannot be I luupm 1 

 to the favorable places Dr. Cos quoted Mr. Jensen as pointing out to be 

 favorable to the severe attacks of the disease. The fruit giowui, of that 

 seenwn stared that much of the bloom and young fnrit bad been dropped 

 hy 5oaae mystersxss manner — frost they b efir i ed to have been tbe cause 

 k had come some time before the real il — iii was done. AH of 



