Patent ID: 6753296
Filing Date: 2004-06-22
Classification: A01N

Abstract:
A method of improving the growth of a plant which is essentially free of insects, characterized in that a plant-growth-improving amount of at least one plant-growth-improving compound of the formula: in which:A is a 2-chloropyrid-5-yl, 2-methylpyrid-5-yl, 1-oxido-3-pyridinio, 2-chloro-1-oxido-5-pyridinio, 2,3-dichloro-1-oxido-5-pyridinio, tetrahydrofur-3-yl, 5-methyl-tetrahydrofur-3-yl or 2-chlorothiazol-5-yl group, R is hydrogen, C1-C6alkyl, phenyl-C1-C4alkyl, C3-C6cycloalkyl, C2-C6alkenyl or C2-C6alkynyl; is â€”N(R)(R2) or â€”SR2; R1 and R2 are either, independently of each other, C1-C4alkyl, C2-C4alkenyl, C2-C4alkinyl, â€”C(&boxH;O)â€”CH3 or benzyl; or taken together, form a group â€”CH2â€”CH2â€”, â€”CH2â€”CH2â€”CH2â€”, â€”CH2â€”Oâ€”CH2â€”, â€”CH2â€”Sâ€”CH2â€”, â€”CH2â€”NHâ€”CH2 or â€”CH2â€”N(CH3)â€”CH2â€”; and X is Nâ€”NO2 or Nâ€”CN or CHâ€”NO2; or in which A is 2-chloropyrid-5-yl, X is Nâ€”CN, Y is CH3 and R1 is methyl; or in which A is 2-chlorothiazol-5-yl, X is Nâ€”NO2, Y is â€”N(R)(R2), R is hydrogen, R1 is hydrogen and R2 is methyl; or in which A is tetrahydrofur-3-yl, X is Nâ€”NO2, Y is â€”N(R)(R2), R is hydrogen, R1 is hydrogen and R2 is methyl; or, where appropriate, a tautomer thereof, in each case in free from or in salt form, is applied to the plant or the locus thereof.