Oxopropionitrile derivatives represented by general formula (1), and insect pest control agents containing the same as the active ingredient and having reduced toxicity and persistence. In said formula R.sup.1 represents C.sub.2 -C.sub.8 alkyl, etc., R.sup.2 represents hydrogen, etc.; R.sup.3 represents a heterocyclic group; and R.sup.4 represents hydrogen, etc. ##STR1##
一般式(1)所代表的氧代
丙腈衍
生物,以其为活性成分的昆虫害控制剂具有降低的毒性和持久性。在所述公式中,R.sup.1代表C.sub.2-C.sub.8烷基等,R.sup.2代表氢等;R.sup.3代表杂环基;R.sup.4代表氢等。##STR1##