Response of buckwheat to Pratylenchus brachyurus and Meloidogyne javanica

Abstract Antagonistic and non-host plants are some of the main strategies for nematode control, but the reaction of several plant species to these parasites remains to be investigated. This study aimed to evaluate the reaction of buckwheat to Pratylenchus brachyurus and Meloidogyne javanica and to assess the effect of buckwheat aqueous extract on P. brachyurus and M. javanica mortality and M. javanica hatching. Experiments were conducted under greenhouse and laboratory conditions. Treatments consisted of buckwheat ‘IPR-92 Altar’ and soybean ‘M6410 IPRO’ inoculated with different levels of P. brachyurus or M. javanica according to each experiment. Buckwheat was found to be a non-host to P. brachyurus. The RF of M. javanica on buckwheat ranged from 1.33 to 4.11, whereas the RF on soybean was 24.00. Buckwheat shoot extracts were effective in promoting nematode mortality and reducing M. javanica hatching. These findings indicate that buckwheat has potential as a cover crop for the control of P. brachyurus, but care is needed when introducing this plant to areas infested with M. javanica.