Organophosphorus anthelmintic and insecticidal compsns - - contg ultrafine silica and a cation

摘要

The compsns contain (a) an organophosphorus cpd of formula (1): (where R=organic gp of 1-4C, Z=S or O, X and X1=halogen, esp Cl or Br) together with (b) 5-40% by wt % of (I), of a silica having a specific surface of 100-500m2/g and a particle size of 1-100 mm, and (c) 2-50%, by wt of (b) of a cationic additive which is an organic base, its acid addn salt, an amide or a quat ammonium salt.