preparation of active microincapsulato ethoprophos

摘要

Microencapsulated ethoprophos comprising an ethoprophos solution in a vegetable oil with a polycondensate wall membrane, prepared from a resin prepolymer comprising formaldehyde and at least one compound chosen from urea and melamine. This product has a low toxicity for mammals, it has hardly any stimulant odour and preserves the same level of nematocidal activity as ethoprophos itself; it also preserves this activity over a prolonged period by slowly releasing the ethoprophos.