The fungi in the rhizosphere, soil as Trichoderma harzianum and Purpureocillium lilacinum important antagonists against pathogenic nematodes and root diseases. The objective of the work was to test the compatibility of the microbiological fungicides Ecotrich® and Nenat® with the chemical phytosanitary products used in the treatment of soybean seeds. We tested the following chemicals Avicta® (nematicide and insecticide), Cruiser® (insecticide), Maxim XL® (fungicide), both in their recommended doses. The culture medium the added chemical products were poured into Petri dishes. The fungi were inoculated with the aid of a platinum loop in three equidistant points, totaling 9 colonies of each fungus. The plates were sealed with plastic film (PVC) and maintained in B.O.D. at 25±1 °C temperature, 70±10% RH and 12 h photophase for 10 days. For the control treatment were poured in the Petri dishes PDA culture medium without the addition of chemicals. The compatibility tests were performed in vitro by comparing changes in vegetative growth, sporulation and spore germination compared to the control. The chemicals Avicta®, Cruiser® and Maxim XL®, allowed the growth of colonies of fungi T. harzianum and P. lilacinum. Products Avicta®, Cruiser® and Maxim XL® were classified by biological index as compatible to the fungus T. harzianum. With regard to the fungus P. lilacinum products Cruiser® and Maxim XL® were classified as compatible, but the chemical Avicta® was classified as moderately toxic, and this chemical can have some effect on the fungus P. lilacinum.

The objective of this work was to evaluate the efficiency of T. harzianum (Ecotrich®) and P. lilacinum (Nemat®) in the management of Pratylenchus brachyurus in soybean. The experimental design was randomized in blocks with four replications, consisting of six treatments, which consist of the control (1), an Avicta Completo® treatment (2), treatment with Nemat® (3), treatment with Avicta Complete® associated with Nemat® ( 4), a treatment with the association of Nenat® and Ecotrich® (5) and a treatment with the association of the bioinsecticides Ecotrich® and Nemat® and Avicta Completo® (6). The plots were composed of 7 lines with 0.45m line spacing, with a size of 3.60 m x 10m. Data on the number of eggs and juveniles were subjected to analysis of variance and the comparison of the average of eggs and juveniles per treatment was obtained by the Skott-knot test at 5% probability and soybean productivity was calculated. At 32 and 60 days after emergence, treatment with P. lilacinum provided the lowest rates of nematodes in the roots and soil. The highest productivity occurred in the treatment with Ecotrich®. The lowest productivity was observed in the treatment with Avicta®+Nemat®+Ecotrich®. The combination of Nemat® with Avicta®+Cruiser®+Maxim XL® and with Avicta®+Cruiser®+Maxim®+Ecotrich®, provided lower productivity. The highest productivity occurred in the Nemat®+Ecotrich® treatment. Sequential application, during two seasons of Ecotrich® alone and Nemat®+Ecotrich®, reduced the populations of P. brachyurus.