214 AGRICULTURE OF MAINE. 



Ersiplie, fungi causing powdery miUIews, that the haustoria 

 of the fungus penetrates the cells, but that the plants "by means 

 of certain physiological processes" were able to prevent "the 

 attainment of that balance whereby working relations between 

 the haustoria and the host cell are brought about and main- 

 tained." It is also stated tliat the host cells of immune plants 

 secrete certain enzymes that are toxic to fungous mycelium or 

 antitoxins are secreted which neutralize or overcome the toxins 

 secreted by th.e fungus. 



Certain it is that the repulsion of the invader is from within 

 in most cases and is effective after the parasite has gained 

 entrance to the host and, what is most fortunate, this property 

 is capable of transmission from one generation to another. 



Forenoon Session. November 23. 



The morning session of the Association was called to order 

 by the President and the order of business taken up. 



Report of the Committee on Corn Zones presented by Dr. 

 Raymond Pearl, Chairman, followed. 



This plan is drawn up merely as a suggestion as to the loca- 

 tion and extent of these zones. All parts of it are open to 

 discussion and criticism. The State shall be divided in three 

 zones called the Northern, Middle, and Southern Zones. 



The boundaries of these zones shall be as follows: 



The southern boundary of the Nortlicrn Zone (which also 

 is the northern boundary of the Middle Zone) shall be a line 

 starting at the extreme southwestern point of Hancock county 

 and following the western boundary line of Hancock county 

 north until this boundary leaves the Penobscot River and then 

 due north to Bangor. From this point (Bangor) it shall turn 

 westward and run in a straight line to the town of Dexter; 

 thence it shall turn southwest and run to the town of Skowhe- 

 gan ; thence it shall run westward to the town of Norridge- 

 wock; thence northwest to the town of Phillips; and thence due 

 west until it meets the New Hampshire line. 



The whole of the following counties shall then be in the 

 Northern Zone; Washington. Hancock, Aroostook, Piscataquis. 

 A major portion of each of the following counties is also in 

 this zone; Penobscot, Somerset, and Franklin. All towns 



