Abstract: Insecticidally active compositions comprising a combination of a C-076 or B-41 macrolide antibiotic with an insect feeding stimulant. The combination shows substantially enhanced activity compared with combinations of pyrethroid insecticides with feeding stimulants.

Abstract: Compounds of the formula ##STR1## wherein R.sup.1 is an alkenyloxy group; an alkoxy group optionally substituted by one or more phenyl radicals or atoms of fluorine, chlorine, bromine or iodine; a phenoxy group optionally substituted by one or more lower alkyl or lower alkoxy groups or atoms of fluorine, chlorine, bromine or iodine; an alkylthio group optionally substituted by one or more phenyl radicals; a phenylthio radical optionally substituted by one or more atoms of fluorine, chlorine, bromine or iodine, or lower alkyl, lower alkoxy, of lower haloalkyl radicals; or an amino radical optionally substituted by one or two alkyl radicals, each of which may optionally be substituted by one or more alkoxy radicals or phenyl radicals; and R.sup.