GB714332A - Compositions of insecticidal and acaricidal activity containing organic halides - Google Patents

Abstract

Insecticidal, acaricidal and fungicidal compositions comprise new organic halides of general formula R.X.CH3'n. Cl-n where X represents an oxygen or sulphur atom, n is either 2 or 3 and R represents a phenyl radical containing at least one chlorine substituent, and which may further contain methyl groups; together with a diluent. The diluent may be a liquid, e.g. water, in which case the formulation may incorporate a solvent or solid carrier, together with a wetting, dispersing or emulsifying agent, with or without stabilisers or other additives. The halides may be employed in spray formulations of the "wettable powder" type. In association with e.g. kaolin, gypsum or chalk, they may be used as dusting agents or as aerosols. Some of the halides appear to act as fumigants. In examples: (1) 4-chlorophenoxythiomethotrichloride is formulated into a self-emulsifying composition with xylene, mineral oil and non-ionic emulsifying agents. 2 : 4-dichlorophenoxymethotrichloride is formulated likewise. (2) 4-chlorophenoxymethotrichloride is formulated into a wettable powder by spraying it on to a diatomaceous earth and treating the product with an ionic wetting agent. (3) 4-chlorophenoxy methotrichloride is impregnated in brown paper, which then serves to produce an insecticidally active atmosphere. Specifications 712,478 and 714,410, [both in Group IV(b)], (relating to the preparation of the organic halides) are referred to.