R. Rodriguezkabana et al., MIXTURES OF OLIVE POMACE WITH DIFFERENT NITROGEN-SOURCES FOR THE CONTROL OF MELOIDOGYNE SPP ON TOMATO, Journal of nematology, 27(4), 1995, pp. 575-584
The efficacy of mixtures of dry olive (Olea europea) pomace with biure
t, guanidine, and melamine for control of root-knot nematodes (Meloido
gyne spp.) on tomato (Lycopersicon esculentum) was studied in greenhou
se experiments. Olive pomace (OF) applied pre-plant at 10 g/kg soil wa
s phytotoxic. Mixtures of OP (10 g/kg soil) with biuret or guanidine a
t 200-300 mg/kg soil reduced or eliminated the phytotoxic effect, cont
rolled root-knot nematodes, and increased soil esterase activity indic
ative of microbial activity. The addition of biuret or guanidine witho
ut OP to soil at rates <300 mg/kg soil did not control root-knot nemat
odes. Melamine applied at 100-400 mg/kg soil was phytotoxic as were mi
xtures of melamine with OF. Treatment of OP with anhydrous ammonia inc
reased N content of the material. In another greenhouse experiment, NH
3-treated OP added to soil was not phytotoxic to tomato, suppressed ro
ot-knot nematodes, and increased soil esterase activity. Greenhouse an
d microplot experiments with OP plus chicken litter demonstrated the e
fficacy of these combination amendments to control root-knot nematodes
and increase tomato yields in Meloidogyne-infested soil.