An experiment was carried out at La Platina Experiment Station, INIA, to compare the effect of organic matter (from city waste), and of four chemical products on the yield and control of nematodes in tomatoes (Licopersicon esculentum Mill.). The soil was highly infested with Pratylenchus spp., Helicotylenchus spp., Meloidogyne spp. and Xiphinema americanum. The chemicals, sprayed and incorporated to the soil in bands, were: DD, at 150 1/ha; DBCP 75% EC, at 6 1/ha; Nemacur 10% G, at 100 Kg/ha, and Di Trapex, at 200 1/ha. Organic matter was used at arate of 20 ton/ha.
DD and Di Trapex gave yields (85.20 and 88.33) with no statistical difference, but significantly higher than the rest of the treatments. Nemacur and DBCP yields (77.50 and 76.10 ton/ha) had no significant difference, but were higher than organic matter and the control treatment. The organic matter treatment gave 44.66 ton/ha, statistically higher than the control, that gave only 29.16 ton/ha.
The percent control of nematodes, was: 84% for Di Trapex; 68% for DD; 60% for Nemacur 10% G; 53% for DBCP, and 49% for organic matter.