Development of Meloidogyne incognita and M. javanica in soybean roots

Resumo

The development of Meloidogyne incognita (races 1 and 3) and M. javanica on soybean cv. Cobb was determined in the greenhouse. Second stage juveniles of the nematode penetrated the roots within 12 hrs after inoculation. Development in root tissues proceeded normally to the egg laying females with slight periodical variations. The life cycle duration of M. incognita race 1, M. javanica and M. incognita race 3 was 40, 45 and 50 days, respectively. In another test, the life cycle of M. incognita race 3 was completed within 30 and 50 days after inoculation in roots of cvs Calland (susceptible) and Bragg (resistant), respectively.