Insecticidal compositions resistant to active ingredient degradation and process for preparation thereof

A process for preparing a composition of a phosphoramidothioate that is resistant to degradation, said process comprising:

• preparing a mixture of water and an electrolyte in a ratio from 1:1 to 1:20;
• preparing a blend of a phosphoramidothioate active ingredient, remaining electrolyte if any, excipients, and optionally one or more additional active ingredients;
• preparing an admixture of the blend with the mixture of the water and electrolyte, and
• formulating the admixture, wherein said phosphoramidothioate is acephate,
• wherein degradation of acephate is less than 5% by weight of acephate in the composition after 14 days at 54±2° C.