EC formulations comprising organophosphate insecticides

An emulsifiable concentrate (EC formulation) comprising (% by weight):

• 10-40% of one or more actives selected among organophosphate compounds having the following structure (formula (I)):
• wherein:
• L1 is oxygen or sulphur,
• L2 and L3, same or different from each other, are selected from oxygen, sulphur and a NH group,
• with the proviso that at least one of L1, L2,
• and L3 is sulphur and at least one of L1, L2,
• and L3 is oxygen,
• M is selected from oxygen, sulphur and NH;
• 1-20% of methyl or ethyl esters of fatty acids having a C10-C20 chain, saturated or unsaturated, and mixtures thereof (additive (A));
• 0.5-10% of a cellulose derivative soluble in the organic solvent of the EC formulation selected from cellulose alkylethers and carboxy alkyl cellulose esters (additive (B));
• 3-15% of one or more surfactants selected from non ionic and anionic surfactants, and mixtures thereof;
• the complement to 100% being one or more organic solvents having the following characteristics:
• capable of solubilizing the one or more active, expressed as % by weight, at room temperature (20-25° C.) for at least 5%;
• and
• immiscible with water;
• wherein the organic solvents are selected from the following group:
• alkylbenzenes having a number of carbon atoms from 7 to 20 and mixtures thereof, the alkyl being linear or branched;
• and linear or branched C7-C9 alkyl esters of acetic acid.