- 37 
1934 
Yothers, M. A. (188) 
Report on the introduction of Aphelinus mali Hald., a parasite of 
the woolly apple aphid in the Wenatchee, Wash., district. 
Wash. State Hort. Assoc. Proc. 30(1934): 68-71. 
Consignments of A. mali were obtained from Ontario and 
Oregon in 1931 for the control of Eriosoma lanigerum , in view 
of its association with perennial canker. In July the parasites 
were introduced into a large cage constructed around a heavily 
infested apple tree, and within 60 days their numbers had in- 
creased so that 25,500 of their progeny were released. Others 
were released later, and by 1934 the parasite had checked the 
aphid in many orchards throughout the district. 
1935 
Anonymous (189) 
Woolly aphis killed by hungry parasite. Yakima, Wash., Fruit 
Growers* Assoc. "Big Y" Bui. 14(1): 6. 
A brief popular discussion of the success of the woolly apple 
aphid parasite, Aphelinus mali , in controlling the aphid in the 
Wenatchee, Wash, district, and its spread over 8 to 10 square 
miles. (See 188). 
(190) 
Memoria de los trabajos realizados por la Estacion de Fitapatologia 
agricola de La Coruia, ano 1934. Galicia Pub. Estac. Fitopat. 
Agr. 10, 79 pp. 
Reports the introduction of Aphelinus mali , from Barcelona 
into Galicia (Poland) and its successful establishment and re- 
distribution into other districts. 
(191) 
Insect pests and their control. Agr. Gaz. N. S. Wales 46(7): 
394-398. 
In most apple orchards the woolly apple aphid is kept under 
control by the parasite Aphelinus mali. 
