Tj. Baum et al., CHARACTERISTICS OF MIXED MELOIDOGYNE-ARENARIA AND MELOIDOGYNE-INCOGNITA POPULATIONS IN FLUE-CURED TOBACCO, Fundamental and applied nematology, 18(6), 1995, pp. 589-594
Two years of field experiments were conducted to characterize the asso
ciation of Meloidogyne arenaria race 2 (populations Pelion and Govan)
and M. incognita race 3 in tobacco resistant to M. incognita races 1 a
nd 3 and tobacco susceptible to both Meloidogyne species. Experiments
also studied whether host resistance to M. incognita races 1 and 3 was
modified by M. arenaria infection. Tobacco plants were simultaneously
inoculated with eggs of M. incognita and M. arenaria. Species identit
y of Meloidogyne was determined at harvest by lengths of second-stage
juveniles. M. arenaria race 2 infection did not predispose the M. inco
gnita-resistant tobacco to M. incognita parasitism. Root galling of M.
incognita-resistant tobacco was more severe with the M. arenaria popu
lation Pelion than with Govan. In infestations of susceptible tobacco
with M. arenaria and M. incognita, M. arenaria Govan proportions at en
d season were greater (P = 0.05) than Pelion proportions in similar tr
eatments.