EMBRYOGENESIS AND POSTINFECTION DEVELOPMENT OF MELOIDOGYNE KONAENSIS

The effects of temperature on embryogenesis and postinfection developm ent in Meloidogyne konaensis were examined. Embryogenesis was evaluate d at 5, 8, 10, 13, 16, 20, 22, 24, 26, 28, 30, 35, and 40 C. No embryo nic development occurred at 5 C. Some development, although incomplete , occurred at 8 and 10 C. The rate of embryogenesis was linear from 13 to 30 C, but decreased at 35 C. The lowest egg mortality occurred at 24 C, whereas all eggs died within 24 hours at 40 C. Postinfection dev elopment was determined on coffee and tomato in a greenhouse at an ave rage temperature of 30 C and in a growth chamber with a constant tempe rature of 26 C. Development of M. Konaensis J2 to mature female requir ed 38 and 48 days on coffee at 30 and 26 C, respectively. This process took 20 and 26 days, respectively, on tomato.