Seleção de introduções do gênero Brachiaria (Griseb) resistentes à cigarrinha Zulia entreriana (Berg) (Homoptera: Cercopidae)
| Autor: | Janice Peixer, Helma Jeller, José R. Valério |
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| Přispěvatelé: | JOSÉ R. VALERIO, CNPGC, HELMA JELLER, CNPGC, JANICE PEIXER, CNPGC. |
| Rok vydání: | 1997 |
| Předmět: |
Germplasm
Cigarrinha das Pastagens Breeding program Beef cattle entomology Pasture Zulia Entreriana Cultivar Marandu Basilisk geography geography.geographical_feature_category Brachiaria Decumbens biology Tropical agriculture Brasil Spittlebugs Entomologia biology.organism_classification pest resistance Brachiaria Brachiaria Brizantha Variedade Resistente Horticulture Monoculture Brazil |
| Zdroj: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| ISSN: | 0301-8059 6663-3419 |
| DOI: | 10.1590/s0301-80591997000200023 |
| Popis: | Spittlebugs are the most damaging pasture pests in tropical America where extensive monocultures of Brachiaria decumbens cv. Basilisk have favoured the builup of spittlebug populations. Under servere spittlebug attack, the entire above-ground portion of the plant appears dry and deade, reducing the stocking rates of damaged pasture. Houst plant resistance is a low-cost method of controling spittlebugs, which farmers can easily adopt. High level of spittlebug resistance is found in the cultivar B.brizantha cv. Marandu, but it requires more fertile soils. A Brachiaira germplasm provided by the international Center for Tropical Agriculture and available at the National Center for Beef Cattle Reearch (CNPGC) has been screened for spittlebug resistance. In the present study 30 introductions of Brachiaria were evaluated for resistance to the espittlebug Zulia entreriana (Berg), based on nynphal survival and period. The introductions (BRA 1945, bra 3115 and BRA 3425), all B. brizantha, were selected as resistant. Given the great number of available introductions and even hidrids resulting from the breeding program, this has been done routinely at the CNPGC in the search for sources of resistance.Complementary evaluations aiming the releasing of new spittlebug resistant Brachiaria cultivars are in progress. Made available in DSpace on 2020-04-16T01:00:10Z (GMT). No. of bitstreams: 1 SelecaodeintroducaodogeneroBrachiaria.pdf: 2215538 bytes, checksum: 558ac8ca0fa93ad11ea47a6663341978 (MD5) Previous issue date: 1997 Título em inglês: Selection of Introductions of the Genus Brachiaria (Griseb) Resistant to theSpittlebug Zulia entreriana (Berg) (Homoptera: Cercopidae. |
| Databáze: | OpenAIRE |
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