26 Pomona College Journal of Economic Botany 



Inspection has shown that evidences of the diease could be found in every 

 party of Ventura county. During the month of December, 1910, the navel 

 orange trees of A. Anlauf in Santa Paula canyon showed the same condi- 

 tions, while most of the lemon trees were affected, as noticed by the experts 

 at the Limoneira ranch. 



As soon as the attack was noticed, branches and leaves were taken to the 

 laboratory and the characteristic-fruiting bodies of the wither-tip were ob- 

 tained in great numbers. Samples were also sent to the Bureau of Plant 

 Industry at Washington and to the Whittier Pathological Station. The 

 replies affirmed the observations taken in the laboratory here and were as 

 follows : 



Figure 14. At left showing ground under trees covered with fruit and leaves dropped 

 by the wither-tip; at right, the side of a tree with numerous 

 twigs killed by wither-tip. 



"E. O. Essig, Santa Paula, Cal. 



"Dear Sir: I regret the delay in answering your letter of November 5th. 

 I have been away travelling nearly all the time for the last month and in 

 the meantime, Miss Hasse, my assistant, has made a careful examination of 

 these specimens. They turn out to be typical wither-tip, the fungus Collcto- 

 trichum gloeosporioides being abundant * * * Your experience in having 

 this attack following a series of rains is also the regular thing for that fungus. 



"Yours very truly, M. B. Waite, Pathologist in Charge." 

 Washington, D. C, Dec. 12, 1910. 



"Southern California Laboratory, 

 "Whittier, Cal., Nov. 7, 1910. 



"Mr. E. O. Essig, 



"Horticultural Commissioner, Santa Paula, Cal. 

 "Dear Mr. Essig: Your interesting letter of November 5th and specimens 

 of diseased orange twigs at hand. 



