174 EXPEllLMENT STATION. [Jan. 



tbickc'i- than at the opixjsitc side of the Iwiu, where the tension is 

 ditferent. 



J\Iiero.seopical examinations of sections also showed that con- 

 siderable healing of the \vonnd caused by guniniosis took 

 idace. The callus fonniuii as a result of this healing developed 

 ridges along the side of the wound. The cavity of the wonnd 

 was entirely filled with gum, which contained Cladosporium 

 and a form of AUernaria. 



Suggestions in Hcgaid to tlw Trcnttneid of Guniniosis. 



In ver}^ l)ad cases of gununosis it would be best to destroy 

 the tree, since it is of little value and nuiy possibly furnish 

 an ideal place for the development of undesirable organisms. 

 Branches nuiy be cut off a few inches below the affected areas. 

 Since this disease undoubtedly originates from the practice of 

 leaving " mummied " fruit attached to the tree, it is best to 

 remove and destroy them. It is even a question whether " mum- 

 mied " fruit should be left on the ground. Practically all cases 

 of infection from giimmosis have occurred where the " mum- 

 mied " fruit was left on the tree, and came in contact with the 

 limb or branch. 



Care should also be exercised in ])runing, and this should be 

 done in winter or early spring. A clean, sloping cut should be 

 made, and large wounds should be covered with paint or coal- 

 tar. This treatment will prevent infection from the wounds. 



The practice of good sanitation and systematic spraying of 

 peach trees, together with cultivation and feeding, will un- 

 doubtedly hold this disease in check. 



DlUECTlOXS FOR iMAKIX(; SuMMEU SpRAY ]\IiXTURE. 



Essciiti(i]!<. 

 In making the self-boiled lime sulphur plus arsenate of lead, 

 as recommen(|ed for the summer sprayings, the first essentials 

 are to have good stone lime, a perfect mixture of the ingredi- 

 ents, and two men to attend to the mixing. After being mixed 

 it is necessary that the mixture be ke]it well agitated while in 

 the tank, for if not it will settle, no uuitter how well made. To 



