Efecto de Trichoderma en el crecimiento de chile Catiknifap (Capsicum annuum L.) y en el control de Meloidogyne incognita.

Objective. Estimate the effect of native Trichoderma strains on initial growth 45 days after sowing Catiknifap chili and control of the sedentary endoparasitic nematode Meloidogyne incognita (Mi) 97 days after inoculation. Materials and methods. Two experiments were established under greenhouse conditions, both of which included 12 treatments: 10 corresponded to each Trichoderma strain (C1... C10), a chemical fertilization treatment and one without Trichoderma and no fertilization. In the second experiment, in addition to the treatments consisting of the Trichoderma strains, one with chemical nematicide (Oxamil 24%) + Mi and another without chemical nematicide, without Trichoderma + Mi (control), were included. The treatments were established in a completely randomized experimental design. Results. At 45 days after germination, the tallest seedlings were obtained with the chemical fertilization treatment (20.42 cm). Treatment C9 promoted greater growth in root volume (1.36 cm3) and C1, C2 and C9 dry root biomass (0.058 mg) in relation to the chemical fertilization treatment, without Trichoderma and without fertilization. At 97 days after the inoculation of the nematode, the nematicide Oxamil reduced root damage by 39.74%. Treatments C1 and C9 reduced egg production by 90.82% and 88.64%, respectively, in relation to the nematicide Oxamil and without Trichoderma + Mi. Treatments C1, C2, C3, C5, C6, C7, C8, C9 and C10 reduced the number of females from 67.87% to 84.33% in relation to the control and from 48.38% to 74.83% in relation to the nematicide Oxamil and without Trichoderma + Mi. Conclusion. Treatment C9, with Trichoderma, promoted the growth in root volume of the seedlings and with C1, C2 and C9 the dry root biomass. Nematode egg production decreased with treatments C1 and C9, and females with treatments C2, C3, C5, C6, C7, C8, and C10, with greater effects than the nematicide Oxamil. [ABSTRACT FROM AUTHOR]