Nematocidal heterocyclic amides

A method for controlling a soil-dwelling nematode comprising contacting the nematode with a biologically effective amount of a compound selected from Formula 2,

• wherein
• Q is a furan ring substituted with R4 at a carbon atom adjacent to the carbon atom through which the furan ring is bonded to the remainder of Formula 2;
• R1a is C1-C6 alkyl or C3-C6 cycloalkyl, each unsubstituted or substituted with at least one R5;
• R1b is H or C1-C3 alkyl;
• or
• R1a and R1b are taken together with the carbon atom to which they are attached to form a 3- to 6-membered cycloalkyl ring, unsubstituted or substituted with at least one R5;
• R2 is H;
• or C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C6 cycloalkyl, C2-C6 alkylcarbonyl, C2-C6 alkoxycarbonyl, C1-C6 alkylthio or C1-C6 alkylsulfonyl, each unsubstituted or substituted with at least one R5;
• R3 is C2-C16 alkyl, C2-C16 alkenyl, C2-C16 alkynyl or C3-C6 cycloalkyl, each unsubstituted or substituted with at least one R6;
• R4 is Cl;
• each R5 is independently halogen, cyano, C1-C3 alkoxy, C3-C6 cycloalkyl, C1-C3 alkylthio, C1-C3 alkylsulfinyl, or C1-C3 alkylsulfonyl;
• each R6 is independently halogen, cyano, C1-C3 alkoxy, C3-C6 cycloalkyl, C1-C3 alkylthio, C1-C3 alkylsulfinyl, C1-C3 alkylsulfonyl or SiRaRbRc;
• and
• each Ra, Rb and RC is independently C1-C6 alkyl.