(5) 



season in the infested districts of the State by giving the flies oo 

 place to rear their maggots would about destroy the pest. We do 

 not think this will be necessary if the careful destruction of wind- 

 falls and infested fruit is practiced. Should such a radical means 

 be necessary the flies could be allowed to deposit their eggs and 

 the fruit approach maturit}' when it could be gathered and fed ami 

 not prove a serious loss. 



SUMMARY. 



1. Thoroughly and promptly destroy all refuse from infest- 

 ed fruit, apple pomace, waste about the house, etc. 



2. Promptly destroy windfall apples and infested fruit. 



3. Destruction should be immediate after the first cf 

 August, and nothing short of deep burying, burning or feed- 

 ing to swine or cattle will be effective. 



4. These precautions should be universally adopted. 



5. The sale or importation of infested fruit should be 

 prohibited. 



THE POTATO ROT. 



Phytophthora Ixfestans, DeBary. 

 (Peronospora infestans, Mont.) 



PROF. F. L. HARVEY. 



We are daily receiving specimens of potato tops and leaves 

 bad y infested with the above disease, and believe the information 

 given below will be of general interest. 



LIFE HISTORY. 



This fungus lives over winter in the form of resting or winter 

 spores (oosporoe; which are found in the stems, leaves and tubers. 

 The steins and leaves decay leaving the resting spores which 

 retain their vitality in the ground, and from these, or from spores 

 in the tubers, the disease starts the following spring. The fungus 

 is deep seated in the stem and leaves of the potato, and later 

 affects the new tubers. During the summer and fall it appears "ii 

 the surface as a vvl.ite mildew, which upon examination will be 

 found composed of branching pedicils (conidiophores), bearing 

 numerous minute white oblong bodies, the summer spores 

 (conidia) of the fungus. These summer spores air carried by the 



