The compounds of formula (1) wherein the substituents are as defined in claim 1 are suitable for use as nematicides.Claim 1: Method for Protecting crops of useful plants from damage caused by pests, nematodes, which comprises treating the plants or the location of these with a compound of formula (1): r u00b9 c u2081 u208b u2082 represents Halogen, alkyl, cyano, haloalquilo c u2081 u208b u2082, Lcoxi c u2081 u208b u2082, haloalcoxi c u2081 u208b u2082 or haloalquiltio c u2081 u208b u2082； R u00b2 c u2081 u208b u2084 represents Hydrogen, alkyl, alkoxy carbonyl, c u2081 u208b u2084)C u2081 u208b u2084 alkoxy, cianometilo, alquenilo c u2082 u208b u2084, alquinilo c u2082 u208b u2084 (cicloalquil c u2083 u208b u2086), carbonyl, cicloalcoxi c u2083 u208b u2086 or benzyl； r u00b3 r u2074 independently of each other and represent Hydrogen or Fluorine； r u2075 u1d43, r u2075 u1d47, r u2075 u1d9c, r u2075 u1d48 and represent a r u2075 u1d49 regardless You other Hydrogen, halogen, alkyl, cyano, c u2081 u208b u2084, haloalquilo c u2081 u208b u2084 c u2081 u208b u2084, alkoxy, haloalcoxi c u2081 u208b u2084, alquilsulfanilo c u2081 u208b u2084, haloalquilsulfanilo c u2081 u208b u2084,Alquilsulfinilo c u2081 u208b u2084, haloalquilsulfinilo c u2081 u208b u2084, alquilsulfonilo c u2081 u208b u2084, haloalquilsulfonilo c u2081 u208b u2084 c u2083 u208b u2086, cycloalkyl, alquenilo c u2082 u208b u2086 or haloalquinilo c u2082 u208b u2086 is optionally substituted cycloalkyl, where one or more substituents and the r u2076 alquenilo est To replace one or more r u2076； each r u2076 represents independently of the other HalogenC u2081 u208b u2084 alkyl or haloalquilo c u2081 u208b u2084； r u2077 represents Hydrogen or Methyl； and salts, enantiomers, Diastereomers, taut u00f3meros n-oxides and agronomically acceptable for these compounds.Claim 9: Compound of formula (1) where r u00b9 represents Halogen, trifluoromethyl R u00b2 represents Hydrogen or Methyl；； r u00b3 and independently of
