The Present Status of our Inseot Control \/ork. 



by 

 Dwlght C. Birch 



The -roblero of oor.tr oiling our tree-killing insects 

 is by no neans solved yet. Just c.t present there is be- 

 ing carried on an intensive study of the areas that have 

 thus far been worked, to find out the effect of the work 

 that has been done, and to see what will happen if no 

 more work is done on then for several years. Other oheok 

 areas amounting to aboiit 3000 acres have been established. 

 Cn these areas there has never been any control work done. 

 The object is to count, each year, for four or five con- 

 secutive years, the number of trees killed by insects and 

 the volume of timber lost thereby. An accurate map is 

 rcc.de of each check area and the location of the infected 

 trees is marked. Each Infected tree bears a designation. 

 Phis map will give us valuable date, as to the nature of 

 the progress or spread of our infestations from a given 

 center. 



The results thus far show that an average of 36 mer- 

 chantable trees per section of land is killed each year. 

 The average volume per tree Is conservatively 1000 feet 

 b.m. This is a loss of approximately 55 feet b.m. per 

 aorft, and for our entire pine type represents e, loss of 

 fifteen million feet annually. Figuring the stumpage 

 value at an average of )2.00 per Iff feet b.m. - which is 

 low for our pine, cur annual monetary loss through in- 

 sects is y30,CCC . This less is silently going on, and 

 from our past experience promises to continue until we 

 refixioe the Infestation by main feroe. 



Six Months at the Panama-California Exposition. 



by 

 Ernest G. Dudley 



Did you ever travel in southern California when it 

 'rmed If you did, yeu learned that yu wore In ^ex- 

 ^eptional weather conditions." Mrs .Dudley and I arrived 

 San Dleg* during such a period. IJo one knew that ex- 

 fifteen years before I had entered that city with 

 uch a storm et r.y heels'. If only people wuld t&ka 



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