03296nab a2200241 i 4500003000900000005001700009008004100026040001800067072001400085100001500099100001700114100001500131245011900146500007600265520106200341520132501403650001702728650001302745650001002758650001902768773019002787856007702977BR-BrBNA20230920100609.0230522b2019    bl.ar|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aH60b0120  aMelo, T.S.  aMakino, P.A.  aCeccon, G.  aWeed diversity in corn with different plant arrangement patterns grown alone and intercropped with palisade grass   aPublicação on-line; 24 ref.; 2 tables; 4 illus.; Summaries (En, Pt)  a

ABSTRACT - Composition and level of weed infestation interfere with crop yield
and increase production costs. This study aimed to identify weed composition and
infestation in corn grown with different plant populations, single, and intercropped
with palisade grass. The phytosociological method was used to evaluate density,
frequency, dominance, and infestation level of weeds in single and intercropped
corn, a with conventional (0.90 m) and reduced (0.45 m) spacing, and low and high
plant population in Dourados, MS, Brazil. Commelina benghalensis,
Echinochloa spp., and Euphorbia heterophylla were the species most found in the
treatments. Single corn with higher plant population decreased weed occurrence.
Treatments with palisade grass under a reduced spacing showed lower absolute
weed infestation (about 75%) when compared to single corn. Weed infestation was
lower in the intercropping of corn with palisade grass, with more pronounced effect
under a reduced spacing.

Keywords: Zea mays, Urochloa, plant population, phytosociology, diversity.
  a

RESUMO - A composição e o nível de infestação de plantas daninhas interferem na
produtividade das culturas e aumentam o custo de produção. Este trabalho foi
realizado com o objetivo de identificar a composição e a infestação de plantas
daninhas em milho cultivado com diferentes populações de plantas, solteiro e
consorciado com braquiária. Utilizou-se o método fitossociológico para avaliar a
densidade, frequência e dominância e o nível de infestação de plantas daninhas
nos tratamentos com milho solteiro e consorciado, com espaçamento convencional
(0,90 m) e reduzido (0,45 m) e com baixa e alta população de plantas, em Dourados,
MS. Commelina benghalensis, Echinochloa spp. e Euphorbia heterophylla foram
as espécies mais encontradas nos tratamentos. O milho solteiro com maior
população de plantas diminuiu a ocorrência de plantas daninhas. Os tratamentos
com braquiária, no espaçamento reduzido, apresentaram menor infestação absoluta
de plantas daninhas (cerca de 75%) quando comparado ao milho solteiro. A
infestação de plantas daninhas é menor no consórcio de milho com braquiária, e
o efeito é mais pronunciado no espaçamento reduzido.

Palavras-chave: Zea mays, Urochloa, população de plantas, fitossociologia,
diversidade.  aERVA DANINHA  aZEA MAYS  aMILHO  aCAPIM UROCHLOA0 0886dLondrina-PR : Sociedade Brasileira da Ciência das Plantas Daninhas, 1978o2023-031023tPlanta Daninha (Brazil)x0100-8358; 1806-9681 (on-line)gv. 37 p. 1-9; (2019)wBR2023000400  uhttps://www.scielo.br/j/pd/a/jNr4cYSZmbz3JgFp8C48DbM/?format=pdf&lang=en