Abstract

VILLA-BRIONES, A. et al. Vermicompost incorporation for the management of Nacobbus aberrans in tomato (Lycopersicon esculentum Mill.). Rev. Chapingo Ser.Hortic [online]. 2008, vol.14, n.3, pp.249-255. ISSN 2007-4034.

The effect of vermicompost and manure was tested for the management of Nacobbus aberrans. Under greenhouse conditions gall index of tomato (Lycopersicon esculentum Mill.) roots (GI) was reduced significantly (P≤0.05), by 27 and 40%, respectively, when vermicompost and manure were incorporated to soil, in comparison to the control with nematode and without amendments. They also increased significantly the root volume (RV) 13.1 and 14.7 more times, dry root weight (DRW) 5.8 and 7 more times and dry shoot weight (DSW) 1.6 and 1.9 more times; furthermore root necrosis was reduced by 28.5 and 25%, respectively. In the field, 85 days after planting, only the variables GI, root necrosis and DSW showed significant differences among treatments; generally, plants grown in soil amended with vermicompost at 12.5 t·ha^-1 (500 g·plant^-1) and 7.5 t·ha^-1 (300 g·plant^-1) reduced GI and root necrosis, and increased DSW. The GI was significantly reduced, as compared to the control, by 29 and 28% with 7.5 and 12.5 t·ha^-1 of vermicompost, respectively; similarly, they increased the DSW by 91.6 y 84.8%.

Keywords : root diseases; manure; management; organic amendments; root-knot nematodes.

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