496 



Appendix. 



in Whitehearts and Bigaroons. They do not occur in the " Guigne a 

 collier," grown in Normandy, nor in the wild cherry. 



Should this insect, which may be British, but which in any case is 

 very rare, and ivlticli is imported in foreign fruit, become noticeable in any 

 l^lantation or garden, it would be wise to forego any crop by having all 

 the fruit destroyed to prevent damage another year and the possible 

 spread to other plantations near, and so, perhaps, over the whole southern 

 part of the country. 



THE JAPANESE OR WEST INDIAN FRUIT SCALE. 



(Diasjjis pentagona. Targ.-Tozz. = Biaspis awygdali. Tryon.) 



Although, as far as we know, this insect is not found in Britain to-day, 

 we must not overlook the fact that it has been imported and has lived here. 



Newstead (1) quotes its ap- 

 pearance at Kew in March 1898 

 on Prunus pseudo-cerasus, on plants 

 imported from Japan which had 

 been out of doors since January 

 in the same year. Again (2), in 

 1899, he says : " In January of 

 the present year a consignment of 

 several hundred Japanese cherries 

 (Prunus pseudo-cerasus) was im- 

 ported into this country from 

 Japan which ultimately fell into 

 my hands, and were disseminated 

 over the British Isles without any 

 knowledge that they were badly 

 infested with the scale. In the 

 following April two of the plants 

 from the consignment were sub- 

 mitted to the writer for the purpose of identifying the insects upon 

 them, which proved to be the destructive scale insect Diaspis amygdali 

 of Tryon. On inquiry it was found that the greater number of the 

 plants of this particular batch (100) had been planted out of doors 

 since the time of arrival, and the examination proved the insects were 

 not in any way affected by their change of climate, but appeared in 

 a perfectly healthy condition." Later, June 3rd, the insects were still 

 found living, so the plants were burned. Some plants do not appear to 

 have been traced. Enough was seen, however, to show that the insect 

 can live in the open in England. 



As the Japanese cherry is often imported to this country, it is very 



[i: KdcnUn. 

 FIG. 320. 

 JAPANESE FRUIT iiCK\.Y. (Dimpis iientagona). 



