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Yellow ( Cyperus esculentus ) and purple ( C. rotundus ) nutsedges, and coffee senna ( Senna occidentalis ) are common weeds in the southern USA and each have been reported as alternative hosts for plant-parasitic nematodes. Our objective was to determine the host suitability of these weeds to plant-parasitic nematodes common in Florida agriculture and turfgrass systems. The root-knot nematode (RKN) species tested included Meloidogyne arenaria , M. enterolobii , M. floridensis , M. graminis , M. hapla , M. incognita , and M. javanica . The host status of sting nematode, Belonolaimus longicaudatus , was also evaluated, but only on the nutsedge species. All RKN species evaluated reproduced on both nutsedge species and had a reproductive factor greater than one, except for M. graminis on yellow nutsedge. However, only M. hapla , M. javanica , and M. graminis induced visual galls on yellow nutsedge and only M. graminis caused galling on purple nutsedge. Meloidogyne arenaria and M. graminis reproduced at a greater rate on purple nutsedge than on yellow nutsedge. Both nutsedge species were good hosts to B. longicaudatus . Coffee senna was a host to M. enterolobii , a poor host to M. incognita , and nonhost to the other RKN species evaluated.

Yellow and purple nutsedge and coffee senna as hosts of common plant nematodes in Florida