All Title Author
Keywords Abstract


Tolerancia do tamanho da semente de soja (Glycine max (L.) Merr.) ao metribuzin Tolerance of soybeans (Glycine max (L.) merr.) seeds of different sizes to metribuzin

DOI: 10.1590/s0100-83581981000200005

Keywords: Tolerancia , tamanho da semente , soja , metribuzin , Tolerance , seed sizes different , soybeans , metribuzin

Full-Text   Cite this paper   Add to My Lib

Abstract:

Este experimento foi instalado em casa-de-vegeta o com o objetivo de avaliar a tolerancia de três tamanhos de sementes de soja (Glycine max (L.) Merr.), cv. UFV-1 classificadas nas peneiras de 10/64" x 3/4", 13/64" x 3/4" e 15/64 x 3/4", a diferentes doses de metribuzin (4-amino-6-tertbutil-3-(metiltio-as-triazina-5(4H) ona ). As doses de 0, 300, 600, 900 e 1.200g do i.a./ha foram aplicadas nos materiais do solo de Ponta Nova-MG classificado como franco-argilo-arenoso, e as doses de 0, 50, 100, 150, 200, 250, 300, 350 e 600g do i.a./ha em areia lavada. Nos materiais de solo de Ponte Nova, a inibi o de 50% do crescimento (I50) das plantas de soja correspondeu à aplica o de 600, 1050 e 1150 g/ha de metribuzin, enquanto em areia lavada os I-,,, foram de 150, 210 e 265g/ha de metribuzin para as sementes retidas nas peneiras 10/64" x 3/4", 13/64" x 3/4" e 15/64" x 3/4", respectivamente. O aumento do tamanho da semente aumentou a toleráncia da soja ao metribuzin. The tolerance of soybeans (Glycine max (L.) Merr.) seeds of three different sizes to the herbicide metribuzin (4-amino-6-tert-butil-3-(metiltio)-astriazina-5(4H)ona) was examined in greenhouse. Seeds were separated on 10/64" x 3/4", 13/64" x x 3/4" and 15/64" x 3/4" sieves. Herbicide doses equivalent to 0, 300, 600, 900 and 1.200g a.i./ha were applied to a sandy loam Ponte Nova (M.G.) soil and 0, 50, 100, 150, 200, 250, 300, 350 to 600g a.i./ha to washed sand. The growth of seeds of size 10, 13 and 15 were 50% inhibited (I50) at levels of 600, 1050 and 1150g of metribuzin in the soil and 150, 210 and 265g/ha in the sand. Thus larger seeds showed greater tolerance.

Full-Text

comments powered by Disqus