59 - 
1947 
Kemp, K. H. (300) 
Codling moth control. So. Austral. Dept. Agr. Jour. 51(1,4,5): 
6-9, 184-186, 220-236, 238. 
The woolly apple aphid is normally parasitized by Aphelinus 
mali. 
Miller, L. W. (301) 
The biological control of insect pests in Tasmania. Tasmanian 
Jour. Agr. 18: 117-119. 
Aphelinus mali is well established in all apple-growing sections 
of Tasmania, and in some it is so effective that spraying is un- 
necessary. 
Newcomer, E. J. (302) 
Growers' results with DDT for codling moth control. Wash. 
State Hort. Assoc. Proc, 42: 55-59. 
The woolly apple aphid was more common in orchards 
sprayed with DDT than in orchards not sprayed with it because 
of the destruction of Aphelinus mali by the DDT. In orchards 
sprayed two or more times with it, an average of only 9 per- 
cent of the aphids were parasitized, as compared with nearly 
70 percent where lead arsenate or cryolite was used. 
O'Neill, W. J., and Lipovsky, L. J. (303) 
The results of experiments with DDT on apples at Wenatchee. 
Wash. State Hort. Assoc. Proc. 42: 61-65. 
When DDT is used, the woolly apple aphid may increase and 
become a major pest, as it was before Aphelinus was estab- 
lished. 
Steiner, L. F. , Summerland, S. A., McAllister, H. J., and 
Fahey, J. E. (304) 
DDT for control of codling moth in the Middle West. Indiana 
Hort. Soc. Trans. (1946) 86: 1-13; Colo. Hort. Soc. Trans. 
1946: 113-133. 
In the Vincennes area, in all tests since 1943, DDT resulted 
in almost complete control of this pest, despite the presence of 
numerous colonies on adjacent trees sprayed with lead arsenate. 
However, in the orchards south of Vincennes, in Kentucky and 
Tennessee, minor outbreaks frequently occurred where DDT 
