-25 
1928 
Van Poeteren, N. (126) 
Verslag over de Werkzaamheden van den Plantenziektenkundigen 
Dienst in het Jaar 1926. Verslag. en Plantenziektenkund. 
Dienst Wageningen. 51, 100 pp. 
Reports the continuation of rearing" of Aphelinus mali and its 
distribution. 
(127) 
Vraagstukken in verband met ziektebestrijding in de fruitteelt. 
Tijdschr. over Plantenziekten. 34(8): 211-229. 
The introduction of Aphelinus mali into Holland in 1926 in 
80 fruit-growing localities has not yet given rise to large colonies. 
1929 
Anonymous (128) 
The breeding of beneficial parasites. Science 41(1780): 152. 
An account of the work of the laboratory for rearing beneficial 
parasites, recently established in England by the Empire Marketing 
Board and under the control of the Imperial Bureau of Entomology. 
This laboratory sent consignments of Aphelinus mali to India and 
Kenya. 
Howard, L. O. (129) 
Aphelinus mali and its travels. Ent. Soc. Amer. Ann. 22(3): 341-368. 
The history of A. mali , the North American parasite of the 
woolly apple aphid, is discussed, as well as its introduction into 
various parts of the world. 
Jancke, O. (130) 
Zur Frage der Ueberwinterung der Blutlaus und ihres Parasiten 
Aphelinus mali Hald. Nachrichtenbl. f. den Deut. 
Pflanzenschutzdienst 9(10): 83-85. 
Twigs infested with woolly apple aphid parasitized by A. mali 
were placed on apple in the open at Naumburg in the autumn of 
1928, and in April and June 1929 the parasite was found to have 
survived the very severe winter. 
