Toxicity and remedial effect of some insecticides on certain bos‌trychid borers, Dinoderus minutus F., Enneadesmus obtusedentatus Les‌ne and Sinoxylon Sudanicum Lesne, were studied under lab. conditions of 31.8°C and 67.2% RH. The comparative toxicity of tested insecticides based on toxicity index (T.I.) obtained from LC50 and LC90 values differed according to tested borers. On D.minutus, basudin has highly effect as compared with sumicidin, cidial and sumithion. On E.obtusedentatus, TA. 50 revealed distinctly that sumithion drive basudin, cidial and sumicidin, while T.I..90 evident that cidial more toxic than sumicidin, basudin and sumithion, re‌spectively. On S.sudanicum, Insecticides arranged based on T.I. 50 to basudin, sumithion, sumicidin and cidial, while they were arranged based on T.I.90 to cidial, basudin, sumicidin and sumithion. The percentages of infestation reduction with each of D.minutus, E.obtusedentatus and S.sudanicum beetles emerged from infested man‌go cuttings showed highly significant differences between different in‌secticidal treatments. Highly effective group (75% - 62% reduction) on D.minutus was for basudin 3600 and 1800 ppm, cidial 3000 ppm and sumicidin 3600 ppm, the same treatments gave reduction of 77.8% - 63.5% for S.sudanicum, while highly effective group (81.6% - 67.3% reduction) on E.obtusedentatus was for basudin, cidial and sumicidin each at rate of 6300 ppm.