2-Tridecanone, 2-tridecanone oxime and its ten oxime esters were synthesized and evaluated for their nematicidal activity against Meloidogyne incognita. 2-Tridecanone was reacted with hydroxylamine hydrochloride to obtain 2-Tridecanone oxime. This on reaction with different acid chlorides yielded corresponding oxime esters. Compounds exhibiting more than 75% nematode mortality at 500 μg/ml dose were further evaluated at lower concentrations. 2-Tridecanone oxime N-O-nonanoate with LC50 of 73.16 μg/ml was identified as the most active followed by octanoyl ester (LC50 of 84.22 μ/ml). Valeryl and isovaleryl esters with respective LC50 of 150.42 and 125.65 μg/ml were moderately active. The activity of the most active compound was, however, less than the commercial nematicide triazophos (LC50 22.35 μg/ml).
Meloidogyne incognita, 2-Tridecanone, 2-tridecanone oxime
