1921-22 



DEPARTMENT OF LANDS AND FORESTS 



245 



SEED COLLECTING. 



The season of 1922 has been a proHfic seed year for many of our native 

 species used in reforesting work. Gathering of cones and seed was carried on at 

 Angus, St. WilHams and at the SandT3anks. 



The following seed was secured : 



IV.— FOREST PATHOLOGY 



(Report of Dr. J. H. Faull for 1922.) 



Investigations on the following topics in forest pathology were continued 

 or initiated during the season of 1922. 



(a) Physiological diseases. {\) Needle blight of white pine. Several hundreds 

 of trees marked in 1918 and 1919 in connection with studies on needle blight in 

 the Temagami Forest Reserve were checked over. In order to determine the 

 effect on the annual accretion of wood, increment boring and blocks were taken 

 from the majority of them; the results are being collated and will be presented 

 in the next report. (2) Effects of late spring or early summer frosts on balsam and 

 spruce. 



(b) ''Red branch" of balsam, pine, and arbor vitae, and ''spike branch'' of 

 spruce. In the Report of the Minister of Lands and Forests for the Province 

 of Ontario for 1920, a brief account was given of an unexplained dying of the 

 branches of balsam, particularly striking and abundant in some localities, and 

 the causes were demonstrated. Observations have been extended since to other 

 conifers. On the entomological side of this problem interesting data have been 

 contributed by Dr. F. C. Craighead of the Federal Entomological Branch, 

 Ottawa. A summary is included in this report. 



(c) Butt and heart rots. — Special attention has been given to the pulp woods, 

 in part because of requests for information from several limit holders, and in 

 part because of the vast and almost virgin field of research offered by the pulp 

 woods. It has seemed particularly desirable to concentrate on balsam {Abies 

 balsamea) for the reason that it is extremely susceptible to disease, and it pre- 

 sents some of the most vital forest problems confronting us to-day in Eastern 

 Canada. Preliminary analyses have been rnade of the distribution of the various 



