Jr. Barillas et al., EFFECT OF INITIAL POPULATION-DENSITY OF MELOIDOGYNE-INCOGNITA RACE-3 ON THE GROWTH OF KENAF (HIBISCUS-CANNABINUS L), Nematropica, 23(1), 1993, pp. 15-19
In a greenhouse experiment, seedlings of kenaf (Hibiscus cannabinus) c
v. Tainung I were inoculated with Meloidogyne incognita race 3 at init
ial population densities (Pi) of 0, 100, 500, 1 000, 2 500, and 5 000
eggs + second-stage juveniles/500 cm3 soil. After 60 days, plant heigh
t, stalk diameter, and root and stem weights were significantly reduce
d at Pi = 5 000 but not at lower Pi's. Shoot dry weights were reduced
46% compared with the untreated control. The total nematode population
(eggs and second-stage juveniles recovered from roots and soil) incre
ased with increasing inoculum levels and the reproductive factor (R =
final population/initial population) decreased as the initial inoculum
level increased.