CONTROLE BIOLÓGICO DE Pratylenchus Zeae EM CANA-DEAÇÚCAR

Abstract

Concomitant with the expansion of the culture, the difficulty in managing nematodes has also increased, such as Pratylenchus zeae in sugarcane, mainly due to the lack of resistant cultivars and specific products. Consequently, the objective was to evaluate the efficiency of biological nematicides in order to provide support for the biological control of P. zeae in this crop. To this end, a field experiment was set up in troughs inoculated with this nematode. The trial was conducted in a completely randomized design (DIC) with seven treatments and five repetitions, which were: T1: Control, T2: Bacillus subtilis + Bacillus licheniformis, T3: Bacillus amyloliquefaciens + Bacillus pumilus + Bacillus subtilis + Trichoderma harzianum + natural bioactivators, T4: Purpuriocillium lilacinum + Pochonia chlamydosporia + Bacillus amyloliquefaciens + Bacillus pumilus + Bacillus subtilis + natural bioactivators, T5: Purpuriocillium lilacinum + Pochonia chlamydosporia + Trichoderma harzianum + Trichoderma asperellum + Bacillus amyloliquefaciens + natural bioactivators, T6: Purpuriocillium lilacinum + Pochonia chlamydosporia + Trichoderma harzianum + natural bioactivators, T7: Purpuriocillium lilacinum + Trichoderma harzianum + natural bioactivators. The fresh root mass (FRM) and population of P. zeae in soil and root were evaluated. Consequently, it was found that T4 promotes a greater fresh root mass than the control. Meanwhile, for the control of P. zeae, a reduction in the root was observed compared to the control in treatments 6 and 7.