There is provided a novel 
pesticide, particularly an insecticide or an 
acaricide. A substituted isoxazoline compound of formula (1) or a salt thereof: wherein A 1 , A 2 and A 3 independently of one another are 
carbon atom or 
nitrogen atom, G is 
benzene ring, etc., L is -CH 2 -, -C(CH 3 )-, -CH(CN)-, etc., X is 
halogen atom, C 1 -C 6 haloalkyl, etc., Y ia 
halogen atm, C 1 -C 6 
alkyl, etc., R 1 is -C(O)R 1a , -C(O)OR 1a , -C(O)NHR 1a , etc., R 2 is 
hydrogen atom, C 1 -C 6 haloalkyl, -C 1 -C 4 alkoxy C 1 -C 4 
alkyl, cyano C 1 -C 6 
alkyl, C 3 -C 6 alkenyl, C 3 -C 6 alkynyl, -C(O)R 15 , -C(O)OR 15 , etc., R 3 is C 1 -C 6 haloalkyl, etc., m is an integer of 0 to 5, n is an integer of 0 to 4. The 
pesticide containing these compounds.