O-4-Pyrimidyl-(thiono)phosphoric acid ester derivs. - used as insecticides, acaricides and nematocides for plant protection

摘要

Pyrimidine derivs. of formula (I) are new: (R1 and R2 are each 1-5C alkyl; R3 is 1-5C alkyl, 3-8C cycloalkyl, or phenyl, opt. substd. by one or more Cl, Br or 1-3C alkyl gp.; Q and Y are each O or S; Z is O, S or NR4. R4 is H or 1-5C alkyl). (Ie are pesticides, esp. insecticides, acaricides, and nematocides. Activity is demonstrated against Aphis fabae, Tetranychus urticae (resistant strain, including eggs), Aedes aegypti, Anagasta kuehniella, Spodoptera littoralis and Acanthoscelides obtectus. (I) can be used in plant protection at 0.5-4 kg./ha.