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Insecticides

Manual of Specifications for Insecticides and for Spraying and Dusting Apparatus. Loose leaf binding, to be supplemented through December 31, 1955. WHO, Geneva, distributed by International Documents Service, Columbia University Press, 2960 Broadway, New York 27, New York. Price $8.50, £3, Fr. fr. 2800, Sw. fr. 35

This is a compilation, in a substantial loose leaf binder, of the various specifications which have been prepared by the Expert Committee on Insecticides of WHO, and previously published in the reports of its sessions.

Specifications, with test procedures, are given for the following materials: technical DDT, technical benzene hexachloride, gamma-isomer BHC concentrates, technical methoxychlor, technical chlordan, technical dieldrin, and pyrethrum extract; DDT water dispersable powders and BHC water dispersable powders; and for emulsifiable concentrates of DDT, BHC and dieldrin. There follow specifications for compression sprayers, hand sprayers, and stirrup-pump-type sprayers. The omission of power sprayers should be remedied soon. Also, under compression sprayers, knapsack type, it is desirable to require a 2 inch depth top lip to minimize spillage on the operator. Specifications for hand dusters, both plunger and rotary types, are also presented, but nothing for power-operated dusters. In addition there are specifications for various accessories and parts, such as rubber hose, cut-off values and hose connectors.