Hydroxypyridine carbamates of the formula ##STR1## wherein R.sub.1 to R.sub.5 as defined below are valuable insecticides and particularly aphicides and Compounds of the formula ##STR2## wherein one of R'.sub.1 and/or R'.sub.3 are substituted carbamoyl and the other is preferably hydrogen or methyl, R'.sub.2 is a variety of substituents among which is hydrogen and acetyl, and R'.sub.3 and R'.sub.4 preferably form together a saturated or unsaturated C.sub.4 -chain which may be substituted, are valuable aphicides.
式子##STR1##中,R.sub.1到R.sub.5如下所定义的
羟基吡啶甲酸酯是有价值的
杀虫剂,特别是蚜虫
杀虫剂。式子##STR2##中,R'.sub.1和/或R'.sub.3中的一个是取代的
氨基甲酰基,另一个最好是氢或甲基,R'.sub.2是多种取代基之一,其中包括氢和乙酰基,R'.sub.3和R'.sub.4最好一起形成饱和或不饱和的C.sub.4链,可以被取代,是有价值的蚜虫
杀虫剂。