(60 Vict. 



'i_ 



Provincial Board of Horticulture. 



21 



i- 



In Oregon and California the No. 1 spray is largely used in fighting this pest, but in our 

 case there is no question that the most strenuous efforts should be made in the first instance 

 to completely extirpate the pest by cutting down and burning any trees found to be infested. 

 As a measure of protection, all other trees or plants in the neighbourhood should be sprayed 

 at least twice in the dormant season. As a summer wash, spray No. 3 is recommended in 

 Oregon and California. 



PARASITES AND NATURAL ENEMIES OF SAN JOSE SCALE. 



The most important parasite, perhaps, is Aphelinus fuscipennis (How.), a common enemy 



)f armoured scales. The general characteristics of fuscipennis are well shown in the accom- 



* panying figure of a closely allied species. (Fig. 7.) This parasite has been 



A. Fuscipennis. raised in large numbers in California. Mr. Alex. Craw reports it as doing 



very effective work in the neighbourhood of Los Angeles. 



(Fig. 7.) — Aphelinus diaspides.) 



(L. 0. Howard and C. L. Marlett, Biilletin No. 3, New Series, Division of Botany, 

 U. S. Department of Agriculture. J 



