Alternatives to methyl bromide soil fumigation for vegetable and floriculture production
Location: Subtropical Plant Pathology Research
Title: Greenhouse evaluation of capsicum rootstocks for management of meloidogyne incognita on grafted bell pepper
Submitted to: Nematropica
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: July 20, 2010
Publication Date: June 1, 2009
Citation: Burelle, N.K., Bausher, M.G., Rosskopf, E.N. 2009. Greenhouse evaluation of capsicum rootstocks for management of meloidogyne incognita on grafted bell pepper. Nematropica 39:121-132.
The growth, development, and nematode susceptibility of various rootstock genotypes grafted to a commercial bell pepper variety scion were evaluated in a series of greenhouse experiments. Nine rootstocks including ‘Caribbean Red Habanero’, ‘ PA-136’ , ‘Keystone Resistant Giant’, ‘Yolo Wonder’, ‘Carolina Wonder’, ‘Charleston Hot’, ‘Mississippi Nemaheart’, ‘Carolina Cayenne’, and ‘Charleston Belle’, were grafted to the commercial variety ‘Aristotle’ as a scion, and inoculated with Meloidogyne incognita. Non-grafted and self-grafted ‘Aristotle’ plants were included as controls. Graft compatibility was assessed by measuring plant growth, while nematode infection was assessed using a gall index, and extraction and quantification of nematodes from roots and soil. Stem weight of the scion ‘Aristotle’ was impacted by the use of different rootstocks, and root weight of the rootstocks varied, however, no rootstock/scion incompatibility occurred. The rootstocks ‘Charleston Hot’, ‘Carolina Wonder’, ‘Charleston Belle’, ‘Mississippi Nemaheart’ and ‘Carolina Cayenne’ were consistently resistant to galling by M. incognita in all experiments, while ‘Aristotle’ ungrafted, ‘Aristotle’ grafted, ‘PA-136’, and ‘Caribbean Red Habenero’ were consistently susceptible to galling. Cultivars ‘Yolo Wonder’ and ‘Keystone Resistant Giant’ varied in their response, with reduced galling in one experiment. Grafting a commercial bell pepper variety scion on nematode tolerant rootstocks has potential to reduce damage caused by M. incognita and contribute to root-knot nematode management as a component in sustainable crop production systems.