ABSTRACT

The cotton variety Phytogen 3196 was tested in the field and in the laboratory for root knot nematode (Meloidogyne incognita) resistance. The variety was planted in a field in Ashley County, AR that was highly infested by the root knot nematode. Treatments of Telone II (1,3-dichloropropene), of 1.5 and 3 gallons per acre as well as an unfumigated check were applied in strips and replicated 3 times. Phytogen 3196 was also planted in a field with a low root knot population density and compared with the root-knot susceptible variety Phytogen 355. Laboratory trials were also conducted to compare nematode galling and reproduction of Phytogen 3196 with several other cotton varieties. Phytogen 3196 exhibited moderate levels of resistance in both the field and in the laboratory. The addition of Telone II did not increase the yield of Phytogen 3196, but the yield of Phytogen 3196 in the field were lower than for the nematode susceptible Phytogen 355.