Reaction of sweet sorghum cultivars to Meloidogyne java']javanica, Rotylenchulus reniformis and Pratylenchus brachyurus

The objective of this work was to evaluate the reproduction of Meloidogyne javanica, Rotylenchulus reniformis and Pratylenchus brachyurus on roots of the sweet sorghum cultivars 'BRS 506', 'BRS 508', 'BRS 509', and 'BRS 511', in three greenhouse experiments. Sorghum seeds were sown in polyethylene pots of 3 L. filled with desinfested substrate, composed of a mixture of soil and sand (2:1). Twelve days after emergence, each plant was inoculated with pure populations of M. javanica, R. reniformis or P. brachyurus, respectively in each experiment. 'BRS 360RR' soybean, 'BRS Cedro' cotton and 'BRS 1010' corn cultivars were used as susceptible standards, respectively in M. javanica, R. reniformis or P. brachyurus experiments. (Crotalaria spectabilis) was used as resistant standard in all experiments. The experiments were conducted in a randomized block design with eight replications. After 60 or 90 days after the inoculations, respectively for M. javanica and R. reniformis or P. brachyurus experiments, nematodes were extracted from the roots and the reproduction factors and nematodes per gram of roots were estimated. Based on the evaluated variables, sweet sorghum cultivars 'BRS 506', 'BRS 508', 'BRS 509' and 'BRS 511' may be considered resistant to R reniformis and M. javanica, and susceptible to P. brachyurus.