Abstract

VALENCIA SERNA, Ricardo Andrés; GUZMAN PIEDRAHITA, Óscar Adrián; VILLEGAS ESTRADA, Bernardo  and  CASTANO ZAPATA, Jairo. INTEGRATED MANAGEMENT OF PHYTOPARASITIC NEMATODES IN DOMINICO HARTÓN PLANTAIN (Musa AAB SIMMONDS) SEEDLINGS. Luna Azul [online]. 2014, n.39, pp.165-185. ISSN 1909-2474.

As a result of feeding of Radopholus similis, both roots and corms are damaged and this results in plant growth deficiency and yield losses up to 80%. Therefore, the objective of this study was to determine the effect of the integration of management practices such as corms sanitary cleaning and biological cleaning such as Arbuscular mycorrhizae (AM), Purpureocillium lilacinum and Bacillus subtilis on the development of Dominico Hartón plantain seedlings and phytoparasitic nematods populations. The experiment was conducted at the Universidad de Caldas Montelindo farm located at 1,010 m.a.s.l.., average temperature 23ºC and 1,800 mm rainfall. The treatments were assigned in a completely randomized block design, each one with 20 corms (experimental units) planted in 5 kg black plastic bags as follows: corms with sanitary seed cleaning without application of products (T1); corms with sanitary cleaning + AM (T2); corms with sanitary cleaning + P. lilacinum (T3); corms with sanitary cleaning + B. subtilis (T4); and corms with sanitary cleaning + AM + P. lilacinum + B. subtilis (T5). The described procedure was also applied to traditional corms planted in soil without sterilization (T6 to T10, respectively). In the treatments established in sterilized soil and cleaned corms, there was not presence of individuals of the main plant parasitic nematodes of plantain, such as, Radopholus, Meloidogyne and Helicotylenchus. Treatments with infested soil with nematodes and cleaned corms, showed a reduction in plant parasitic nematodes up to 64% compared with the initial population, although they also showed lower amount of nematodes than the control population. From these treatments, the one that had the lowest population of nematodes was the T10 (Infested soil + cleaned corms + AM + P. lilacinum + B. subtilis) with an average population of 472 phytoparasitic nematodes/100 g of soil). The integration of all management practices resulted in the most efficient way to control the plant phytoparasitic nematodes of plantain, with or without soil sterilization, and the corms sanitary cleanness did not affect either the root development or the aerial parts of the seedlings, since there were not significant differences with respect to the treatments using traditional corms.

Keywords : Corms sanitary cleanness; Radopholus similis; Arbuscular Mycorrhizae; Purpureocillium lilacinum; Bacilus subtilis.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )