title: Brachiaria ruziziensis responses to different fertilization doses and to the attack of Mahanarva spectabilis (Hemiptera: Cercopidae) nymphs and adults.
abstract: Cropping practices are necessary in order to help reduce the population of pest insect, such as the induction of resistance through fertilization. Therefore, this study aimed to assess alterations on the production and quality of Brachiaria ruziziensis when receiving the fertilization composed by the macronutrients NPK and/or exposed to the attack of Mahanarva spectabilis nymphs and adults. B. ruziziensis plants were fertilized according to the recommendation (R), half of the recommended fertilization (H), or non-fertilization (C). They were also exposed to different M. spectabilis nymph and adult densities. The damage, regrowth, and bromatological components were evaluated. The fertilization treatment promoted a higher M. spectabilis nymph survival on B. ruziziensis; however, it reduced the damage caused by the forage exposed to nymphs and adults of pest insect, and it did not alter the quality of the signal grass. Moreover, the fertilization treatment enabled forage recovery, even when exposed to 5 nymphs or 10 spittlebug adults.
authors.affiliation: Embrapa Dairy Cattle Research Center, Rua Eugênio do Nascimento, 610 Dom Bosco, 36038-330, Juiz de Fora, MG, Brazil.
authors.forename: Daniela de Melo
authors.initials: Dde M
authors.lastname: Aguiar
authors.affiliation: Embrapa Dairy Cattle Research Center, Rua Eugênio do Nascimento, 610 Dom Bosco, 36038-330, Juiz de Fora, MG, Brazil.
authors.forename: Alexander Machado
authors.initials: AM
authors.lastname: Auad
authors.affiliation: Embrapa Dairy Cattle Research Center, Rua Eugênio do Nascimento, 610 Dom Bosco, 36038-330, Juiz de Fora, MG, Brazil.
authors.forename: Marcy das Graças
authors.initials: Md
authors.lastname: Fonseca
authors.affiliation: Embrapa Dairy Cattle Research Center, Rua Eugênio do Nascimento, 610 Dom Bosco, 36038-330, Juiz de Fora, MG, Brazil.
authors.forename: Melissa Vieira
authors.initials: MV
authors.lastname: Leite
mesh_terms: D000818:Animals; D035201:Brachiaria / Q000254:growth & development* / Q000469:parasitology*; D005308:Fertilizers; D006430:Hemiptera / Q000502:physiology*; D006790:Host-Parasite Interactions; D009758:Nymph / Q000502:physiology
chemical_list: D005308:Fertilizers