Most preferably, the semicarbazone is diflufenzopyr.

Preferably, the auxin transport inhibitor is a semicarbazone compound.

Fruit yield enhancement is achieved by applying a semicarbazone in a fruit yield enhancing effective amount to the locus of a fruit bearing plant.

A semicarbazone derivative of formula (I) or its salt, and a pesticide containing it, are presented.

The present invention relates to novel naphthyl semicarbazone, naphthylhydrazone, naphthyl thiosemicarbazone, and naphthyl thiohydrazone compounds.