A greenhouse experiment was conducted to evaluate the effects of different inoculum
densities of two Saudi isolates of Trichoderma harzianum and Trichoderma viride against
Meloidogyne javanica on tomato. Four densities (104
, 106
, 108 and 1010 spores/g of soil) of each fungus
were used. The results indicate that all four inoculum densities of the two Trichoderma species
suppressed the nematode reproduction and root galling; and increased the growth of tomato plants,
compared to controls. Efficacy of both fungi increased as their inoculum densities increased.
Generally, efficacy of T. harzianum was better than that of T. viride, especially at the highest used
density (1010 spore/g soil) which resulted in the best control