90 Report of State Board of Horticulture, 



sprayed or destroyed during the time of the experiment, and 

 strong hopes were entertained that the extremely favorable 

 conditions would result in a flourishing colony from which 

 beetles could later be distributed to other parts of the State. 

 Several months after the beetles were liberated Mr. Britt 

 and Mr. Chas. Meserve succeeded in finding more than twenty 

 of them still alive and apparently in good condition, but by 

 the following July all had apparently perished, as a most 

 thorough search by Mr. Meserve and myself failed to reveal 

 any trace of them or their progeny, and similar negative re- 

 sults were obtained from another examination the following- 

 year. 



A closely related native species, Chilocorus bivulnerus, has 

 been reported by Mr. A. H. Carson, Horticultural Commis- 

 sioner for the third district, to have practically extermanated 

 the San Jose scale from a badly infested orcMrd near Grants 

 Pass. The late Emile Schanno, The Dalles, Oregon, in 1896, 

 sent me a number of specimens of this species, with the re- 

 port that they were very abundant upon fir trees, which were 

 infested with a closely related scale, Aspidiotus abietis; but 

 no other reports of such habits have been received and I 

 myself have never observed them. 



The much smaller, entirely black, native species, Pentilia 

 misella, is much more generally distributed and undoubtedly 

 destroys a great many scales, but for som.e reason it does 

 not increase rapidly enough to keep pace with the increase of 

 the scale, which appears, likewise, to be true of the three or 

 four internal parasites which have been reared from San 

 Jose scale from various parts of the country. 



APPLE TREE ANTHRACNOSE. 



Less than a decade has passed since those well versed in 

 horticultural affairs were predicting destruction of the apple - 

 growing industry in the humid portions of the Pacific North- 

 west by a disease which was variously known as "canker, '^ 

 "dead spot," or "black spot." Nevertheless, in the last report 

 of the Oregon State Board of Horticulture, President E. L. 

 Smith and Commissioner Carson both express the firm con- 

 viction, based upon personal observation in sprayed orchards. 



