Insecticidal N-substituted (6-halooalkylpyridin-3-yl)-alkyl sulfoximines

1. A compound of the formula (I)

wherein

X represents COOR 4 ;

L represents a single bond;

R 1 represents (C 1 -C 4 ) alkyl;

R 2 and R 3 independently represent hydrogen, (C 1 -C 4 ) alkyl, fluoro, chloro or bromo;

n is an integer from 0-3;

Y represents (C 1 -C 4 ) haloalkyl; and

R 4 represents (C 1 -C 3 ) alkyl.

2. A compound of claim 1 in which Y represents —CF 3 .

3. A compound of claim 1 in which R 2 and R 3 independently represent hydrogen, methyl or ethyl.

4. A compound of claim 1 having the formula

wherein

R 2 and R 3 independently represent hydrogen, methyl, ethyl, fluoro, chloro or bromo; and

n is an integer from 1-3.

5. A composition for controlling insects which comprises a compound of any one of claims 1 - 3 and 4 in combination with a phytologically-acceptable carrier.

6. A composition comprising a compound according to claim 1 in combination with a one or more other insecticides, one or more herbicides, or one or more fungicides.

7. A composition comprising a compound according to claim 1 and a seed.