MR. WILLARD A. MUITSOU 

 DIRECTOR 



EXTENSION SERVICE 



10 43 



April 16, 1945 



Prepared by the Fruit Program Comnittee 

 of the Extension Service 



W. H. Thies, Extension Horticulturist 



Cont ents 



Apple Scab Outlook 



pasts Sulfur in the Spraying Schedule 



An Early Spring 



Pornoloj^ical Paragraphs 



Vfinter Killing of Red Raspberries 



Get Youn^ Trees Off to a Good Start 



Nitrogf?n Content of Apple Leaves 



The "Green Mcintosh" Problem 



Correction of Magnesium Deficiency 



Orchard Heating 



How Frost Injures Fruit Blossoms 



APPLE SCAB OUTLOOK 



There are two principal factors which govern the amount of early 

 season scab infection in xmprotected trees, - the amount of carry over of 

 the scab fungus in the orchard (in last year's scabbed leaves), and the kind 

 of weather encountered during the pre-pink bud stage to petal fall, inclu- 

 sive. If the weather is dry during that period, or if it is characterized by 

 several short wet periods, even a heavy carry over of scab would be of lit- 

 tle consequence. Short periods of wetting servo to release scab ascospores 

 but do not permit infections. If at that timo, however, prolonged wet per- 



Issued by the Extension Service in furtherance of Acts of May 5 and June 30, 

 1914, V/illard A. Munson, Director, Massachusetts State College, United States 

 Department of Agriculture, and County Extension Services cooperating. 



