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Chemo therapy of the root knot nematode meloidogyne graminicola in rice part 1 effects of soaking seeds in nematocide solutions



Chemo therapy of the root knot nematode meloidogyne graminicola in rice part 1 effects of soaking seeds in nematocide solutions



Zeitschrift fuer Pflanzenkrankheiten und Pflanzenschutz 83(11): 665-668



Evaluation of 8 nematocides for their effectiveness as seed soaking treatments for 12 and 24 h at doses of 500, 1000 and 2000 ppm showed that the endoparasitic population and egg mass development of M. graminicola were reduced in varying degrees in 'IR-8' rice plants. Oxamyl, fensulfothion and phorate reduced endoparasites by over 60% and egg masses by over 80%. Only oxamyl and fensulfothion at 500 ppm reduced the egg masses though there was no reduction in endoparasites. Carbofuran was less effective in reducing the endoparasites but effectively reduced the numbers of egg masses. Oxamyl at 500 ppm was as effective as 1000 ppm and above of the other effective nematocides like chlorpyrifos, DBCP [1,2-dibromo-3-chloropropane] or quinalphos. Mephosfolan was ineffective. Soaking seeds in 500 ppm oxamyl or phorate for 12 h or in 1000 ppm fensulfothion or carbofuran for 24 h was an effective prophylactic treatment against the nematode.

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