Distribution atid present status of the San Jose Scale iu Japan. \\^ 



horticultural division of our station with a fair acrage of land was established 

 1902, to make both field experiments and scientific researches with regard to 

 our horticulture ; the last year a lot of stock was brought here from Mary- 

 land, America, in which the scale was found by Mr. B. Hori. The infested 

 trees were destroyed in the both cases. 



IJ:. Nagano-ken. 



The scale has been found in 8 localities mostly in private yards or 

 gardens, the iuiested trees being recently introduced from Nakajima in 

 Aichi-ken and Angio etc. As a general thing along the margin of the lake 

 Suwa, there are pear and quince orchards, where Parlatoria and the San Jose 

 Scale were so numerous and so injurious as to cause the trees to produce no 

 fruit ; therefore some of the growers had removed the trees. 



Some of the localities in this province have an altitude as high as over 

 .1,000 ft. ; and the writer believes that the climate is not suitable to the 

 growth of the pest ; it can hardly be said to exist there, because the hosts 

 brought there from other places do not thrive in this locality. 



15. Niigata-ken. 



The scale has been found at Niigata city, Kisaki, Nuttari, Kawahigashi 

 and Kayaba located chiefly along the bank of the rivers Shinano and Nakano- 

 kuchi, the hosts being comparatively young apple and pear trees. Niigata 

 and its neighbourhood are famous for Japanese pears since a long time, 

 having many old native pear trees everywhere in private yards and on hill 

 sides etc. ; the writer examined these trees very carefully, but he was unable 

 to find out the scale. The new varieties now cultivated were introduced from 

 Yokohama, Kawasaki, Nakajima and Angio ; pear trees in some orchards 

 were badly infested by the scale. Parlatoria and Diaspis were also not 



uncommon. 



16. Toyama-ken. 



Two localities were found infested by the scale, both in private gardens. 



1 7. Ishikaiva- ken. 



The scale has been found in three localities, the infested trees being of 

 recent introduction. 



