INTERAÇÃO DE NEMATICIDAS E CULTIVARES DE SOJA SUSCETÍVEIS A NEMATÓIDES NO CONTROLE DE Heterodera glycines E Pratylenchus brachyurus

Abstract

The phytonematodes Heterodera glycines and Pratylenchus brachyurus cause severe damage to the soybean crop, causing high economic losses annually. In this way, control methods have been studied in order to find solutions that integrate into the management of nematodes. Therefore, the present study aimed to evaluate the interaction between chemical and biological nematicides with soybean varieties susceptible to nematodes, in the control of the nematodes H. glycines and P. brachyurus in the soybean crop, in field conditions naturally infested with mixed population H. glycines and P. brachyurus. The trial was carried out in Uberlândia - MG, in naturally infested field conditions with a mixed population during the season 21/22, a factorial scheme was used in a randomized block design, in which factor A were the susceptible cultivars and factor B the nematicides, totaling 8 treatments and 4 repetitions. The treatments were: T1- CZ77I79RSF IPRO (Check); T2-CZ77I79RSF IPRO + Bacillus firmus I-1582 (70ml/60.000seeds); T3- CZ77I79RSF IPRO + Bacillus firmus I-1582 (70ml/60.000seeds); Fluopyram (500 ml via furrow); T4 - CZ77I79RSF IPRO + Bacillus firmus I-1582 (70 ml/60.000 seeds) + Fluopyram (500 ml via furrow); T5- CZ37B51IPRO (check) + check; T6 CZ37B51IPRO + Bacillus firmus I-1582 (70ml/60.000seeds); T7-CZ37B51IPRO + Fluopyram (500 ml via groove); T8 - CZ37B51IPRO + Bacillus firmus I-1582 (70 ml/60.000 seeds) + Fluopyram (500 ml via the groove). The data were submitted to Shapiro Wilk's normality test. Once this was verified, it was identified whether there was a significant difference, and a comparison was made between the means by Tukey's test at 5% probability, using the R program. normal data even after being transformed, the productivity data, by ANOVA it was possible to conclude that there was a significant difference for the A factor, and by the Tuckey test at 5% of significance, the cultivar CZ77I79RSF IPRO had an increase in productivity when compared to the cultivar CZ37B51IPRO .