A liquid insecticidal composition having a high concentration of active ingredients and good stability at low temperatures comprises:
1) a specified carbamate insecticide, e.g. methomyl, oxamyl or aldicarb;
2) a reaction product of 1) with formaldehyde or paraformaldehyde; and
3) 1-35% by weight, based on the weight of the composition, of water.
The composition may be made by reacting the carbamate insecticide with formaldehyde or paraformaldehyde in the presence of small amounts of water and a base.
一种活性成分浓度高且在低温下稳定性好的液体杀虫组合物包括
1) 特定的
氨基甲酸酯类杀虫剂,例如
灭多威、
恶虫威或
涕灭威;
2) 1)与
甲醛或多
聚甲醛的反应产物;以及
3) 以组合物重量计,1-35%(重量百分比)的
水。
该组合物可通过
氨基甲酸酯杀虫剂与
甲醛或多
聚甲醛在少量的
水和碱存在下发生反应而制成。