the use of chinolinderivaten formulawherein r ', r2 and r3 each independently hydrogen, halogen, nitro, cyano, c1 - c3 alkyl or c1 - c3 - alkoxy,r4, r and r6 independently hydrogen, halogen or a c1 - c3 alkyl, a is a group - ch2 -, - or - ch (ch3 ch2ch2) - undz a cyan or amidoxim, which acyliert on oxygen atom can be oderb) a carboxyl group or a salt thereof, or a salt mercaptocarbonylgruppe of egg a carbonsu00e4ureestergruppe, a carbonsu00e4urethiolestergruppe,just unsubstituierte or substituted carbonsu00e4ureamidgruppe, a cyclisiertes, unsubstituiertes substituiertes derivative or a carbonsu00e4ureamidgruppe or carbonsu00e4urehydrazidgruppe, or;a and z along a unsubstituierten or replaced: tetrahydrofuran - 2 - on - ring, including their su00e4ureadditionssalze and metallkomplexe, for protecting crops against harmful effects of herbicide active 2 - [4 - (2 - chlorine - 3 - fluorpyridin 2 yloxy) - phenoxy] - propion acid derivatives.;the above herbicides 2 - [4 - (2 - chlorine - 3 - fluorpyri din 2 yloxy) - phenoxy] - propionic acid derivatives correspond to the formulawhat y for a group nr16, - o - r18, - s - or - o - n = r18 cr19r20 saysr16 and r17 independently hydrogen, c1 - c8 alkoxy, c1 - c6 alkyl, phenyl or benzyl, r16 and r17, together with the sponsoring stickstoffatom 5 to six member saturated stickstoffheterocyclus, with oxygen or schwefelatom can be interrupted, r1a hydrogen or the equivalent of a alkalimetall -, and -.copper or iron ion; a quaternary c1 - c4 - alkylammonium or c1 - c4 - hydroxyalkyl - ammonium rest; a may be a or several times by amino, halogen, hydroxyl, nitro, phenyl, cyan, c1 - c4 - alkoxy, polyu00e4thoxy with 2 to 6 u00e4thylenoxideinheiten, coor21, cosr21, - conh2 -, - con (c1 - c4 - al koxy) - c1 - c4 - alkyl, (n - di -, c1 - c4 - alkyl, c1 - c4 - alkyl conh -,- n (c1 - c4 alkoxy) - c1 - c4 - alkyl or c1 - c4 - di - alkylamino replaced: c1 - c9 - alkylrest; possibly by halogen or c1 - c4 - alkoxy replaced: c3 c9 - alkenylrest; possibly by halogen or c1 - c4 - alkoxy replaced: c3 c9 - alkinylrest; c3 c9 - cycloalkyl; or, where appropriate, d making cyan, c1 - c4 - alkyl, c1 - c4 - alkoxy, acetyl, coor21, cosr21, conh2,con (c1 - c4 alkoxy) - c1 - c4 - alkyl, (n - di -, c1 - c4 - alkyl or c1 - c4 - alkyl conh - substituiertes phenyl, r19 and r20 independently c1 - c4 - alkyl or a 3 to 6 gliedrige alkylenkette undr21 hydrogen, c1 - c6 alkyl, c1 - c6 halogenalkyl, c, c. - when a person in, c3 - c6 alkenyl, c3 - c6 halogenal kenyl, c3 - c6 alkinyl or c3 - c6 halogenalkinyl mean.
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