Utilization of organic and bio fertilizers against root-knot nematode (Meloidogyne incognita) infecting faba bean (Vicia faba L.)

Eman S. Hagag, El-Shafeey I. El-Shafeey, Ghada S. Abu El-Naga, Mohamed A. Abd-El-Hadi

Abstract: Two experiments were conducted under greenhouse conditions to evaluate susceptibility of five cultivars of faba bean (Vicia faba L.) to root-knot nematode (Meloidogyne incognita). Also, the influences of Rhizobium leguminosarium (R), arbuscular mycorrhiza fungi (AMF), inoculation separately and in combinations, potassium humate and compost tea on the activity of Meloidogyne incognita in faba bean host plants and plant growth parameters were studied. The results indicated that nematode succeeded in developing and multiplying on almost all of tested cultivars of faba bean. According to rating scale based on damage index (DI) on nematode, Giza 40, Giza 716, Sakha 3 and Sakha 283 cultivars were considered as susceptible hosts to nematode infection, while Misr-1 cultivar was classified as a moderately resistant host. The tested organic and bio fertilizer treatments significantly reduced the number of galls/ root system with 50.00-84.64% and reduced the final nematode population in soil (J2) by 77.5-91.3% compared to control 1 (nematode only). The highest reduction was achieved, when the soil was treated with potassium humate at the higher concentration (humate 2), then AMF treatment, which were not significantly different from the nematicide Vydate 24% SL. Also, all treatments significantly increased the dry weights of shoots and number of flowers, except in case of R (Rhizobium leguminosarium) with nematode or low concentration of potassium humate, and enhanced length of plants and leaf content of total mineral including N, P, K, compared with control 1. Present findings may promote organic and bio fertilizers and eco-friendly management of M. incognita.

Keywords: bio fertilizers; faba bean; Meloidogyne incognita; organic fertilizers

Date published: 2019-07-31