• During thi .snoaphids 
had almost 
annihilated aerial colonies of the woolly apple aphid 
in th. | 8 , f y *"' 1U 
, M. A. 
coolly apple aphid parasite (Aphelinus mail). Jour 
E on. Ent, • : 934. 
rds where DDT was used to control the codling moth 
the woolly ip hid parasite was unable to maintain its out- ' 
standing control of the aphid, and it wrill \. probably be 
•essary to substitute spraying for biological control. 
1948 
Bevienn, P. 
ntesygdomme i Danmark 1945-46. Tidsskr. for Plante 
51:373--: 2:236-292. /Also in Aars, . P ] .., ■ 
Forsog. 62-6377 ' 
Reports the spread of both Kriosoi. rum and its 
site on apple in Denmark. ' 
hopp, V. C. 
L^ r ge-S • control problems. S> : 143-145, 169. 
W pple aphid build-: DDT is used is asso. 
W1 " m of the aphid's enemies, 
site Aphelinus mali on apple in D rk. 
A - W « • , K. 
Codlii thconl 
Jour. 13-146, 
Aphelinus n .th ,j. 
in small ii. 
(306) 
(307) 
(308) 
