Bragantia (2018) 77, 107-115

Eliane Grisoto, José Djair Vendramim, André Luiz Lourenção, Filho José Alfredo Usberti and Ricardo Alves de Olinda (2018)
Evaluation of forage grass resistance to Mahanarva fimbriolata (Stål)
Bragantia 77 (1), 107-115
Abstract: The aim of this study was to select forage grasses with potential resistance to Mahanarva fimbriolata by assessing effects on insect. No-choice assays were conducted with 12 genotypes and laboratory-reared insects. The following parameters were assessed: mortality and duration of the nymphal stage; adult weight and longevity; pre-oviposition period; number of eggs/female; viability and duration of the embryonic period. As main result it was verified that the mortality of nymphs reared on Panicum maximum cv. Paredão is almost complete and that this forage grass may be characterized as resistant to this insect by antibiosis. Further, the grasses can be divided into three groups following a cluster analysis: P. maximum cv. Aries, Setaria sphacelata cv. Kazungula, Brachiaria humidicola, A. gayanus and P. maximum cv. Aruana, which are insect-resistant grasses; Brachiaria decumbens cv. Basilisk, B. dictyoneura, B. brizantha cv. MG-4 and B. ruziziensis, which are moderately resistant grasses; and B. brizantha MG-5 and B. brizantha ecotype BB185, which are susceptible grasses.
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Database assignments for author(s): José Djair Vendramim

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Mahanarva fimbriolata	Setaria (crop)
	Mahanarva fimbriolata	Panicum (crop)
	Mahanarva fimbriolata	Brachiaria (crop)
	Mahanarva fimbriolata	Andropogon (crop)