Suppression of two levels of Meloidogyne incognita infection in tomato root by two formulations of vesicular-arbuscular mycorrhizal (VAM) inoculant

• Published in: Journal of Tropical Plant Pathology (Philippines) Vol. 40; no. 1-2
• Main Authors: Laurinaria, D.M, Orajay, J.I, Brown, M.B.,Philippines Univ. Los Banos, College, Laguna (Philippines). Dept. of Plant Pathology
• Format: Journal Article
• Language: English
• Published: 01.01.2004
• Subjects: FORMULACIONES; FORMULATION; FORMULATIONS; http://www.fao.org/aos/agrovoc#c_24415; http://www.fao.org/aos/agrovoc#c_3068; http://www.fao.org/aos/agrovoc#c_31072; http://www.fao.org/aos/agrovoc#c_3852; http://www.fao.org/aos/agrovoc#c_3879; http://www.fao.org/aos/agrovoc#c_4475; http://www.fao.org/aos/agrovoc#c_6651; INFECCION; INFECTION; INOCULACION; INOCULATION; LYCOPERSICON ESCULENTUM; MELOIDOGYNE INCOGNITA; MICORRIZAS ARBUSCULARES VESICULARES; MYCORHIZE A VESICULE ET ARBUSCULE; RACINE; RAICES; ROOTS; VESICULAR ARBUSCULAR MYCORRHIZAE
• ISSN: 0115-0804

The effect of pre-colonization of tomato roots by vesicular-arbuscular mycorrhizal (VAM) fungi on the eventual infection of Meloidogyne incognita inoculated at low and high levels was studied in a greenhouse experiment. The tomato plants were pre-treated with either MycoVam or mycorrhizal root inoculant, with untreated plants serving as the control. One month after, they were either left uninoculated or inoculated with 1000 and 5000 eggs of M. incognita per plant. At the end of the experiment, plant growth and yield parameters were assessed and nematode count and mycorrhizal colonization determined. Results showed that inoculation with either of the two types of mycorrhizal inoculant did not significantly increase plant growth and yield. On the other hand, MycoVam and mycorrhizal root inoculant reduced galling by about 73 and 62%, respectively, indicating suppressed infection at both low and high level of nematode inoculation. Nematode count in the soil and root system were also significantly decreased by mycorrhizal treatment by as much as 94 and 70%, respectively. MycoVAM treatment was found more effective in suppressing M. incognita infection particularly at high nematode inoculum density than mycorrhizal root inoculant. This treatment also resulted 86% colonization of tomato root system, which was significantly higher than root inoculant.