efeitos do controle de plantas daninhas, com herbicidas, na produção e qualidade fisiológica de sementes de feijoeiro (phaseolus vulgaris l.) effects of weed control with herbicides on yield and physiological quality of field beans (phaseolus vulgaris l.) seeds

Clicks: 340
ID: 175109
1980
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Abstract
Objetivando avaliar o efeito de herbicidas no controle de plantas daninhas, na produção e na qualidade fisiológica das sementes de feijoeiro (Phaseolus vulgaris L.) cv. Rico 23, foi instalado um experimento no campo, em solo Podzólico Vermelho-Amarelo Câmbico, fase terraço, com 2,8% de matéria orgânica e textura argilosa. Usaram-se os tratamentos: testemunha com capina; testemunha sem capina; EPTC a 5,70 kg i.a./ha; trifluralina a 0,75 kg i.a./ha; EPTC a 2,00 kg i.a./ha + trifluralina a 0,60 kg i.a./ha; nitralina a 1,00 kg i.a./ha e pendimethalin a 1,50 kg i.a./ha. Avaliaram-se a população inicial e a produção de grãos pelo feijoeiro e o número de plantas daninhas Realizaram-se, também, testes de avaliação da qualidade fisiológica das sementes do feijoeiro. pelo teste-padrão de germinação, teste de primeira contagem, peso de matéria seca das plãntulas na primeira contagem e teste de germinação após 20, 40 e 60 horas de permanência das sementes na câmara de envelhecimento precoce. No campo, observou-se predominância de trevo (Oxalis sp), picão-branco (Galinsoga parviflora) e tiririca (Cyperus rotundus). Não se observaram diferenças significativas entre os tratamentos, quanto ao controle de plantas daninhas e<< stand>> inicial e produção do feijoeiro. O teste-padrão de germinação não foi bom parâmetro para diferenciar níveis de vigor das sementes. O herbicida trifluralina não prejudicou o acúmulo de matéria seca pelas plântulas. O tratamento das sementes do feijoeiro na câmara de envelhecimento precoce, a 42 ± 3ºC e 95% U.R., pelo período de 20 horas, promoveu, nas sementes do tratamento testemunha sem capina, deterioração precoce, diferenciando-o do EPTC + trifluralina, que permaneceu vigoroso.
This experiment was planned to evaluate the effect of herbicides on yield and physiological quality of field bean seeds. A trial was carried out on a Cambic yellow Podzolic, terrace fase clay soil, with 2,8% of organic matter. The following treatments were applied: a) mechanically weeded; b) non-weeded; c) EPTC at 5.70 kg a.i./ha; d) trifluralin at 0.75 a.i./ha; e) EPTC 2,00 kg a.i./ha + trifluralin at 0.60 kg a.i./ha; f) nitralin at 1.00 kg a.i./ha e pendimethalin at 1.50 kg a.i./ha. Seed physiological quality was determined by the fo llowing te sts: acce lerated aging, first count germination, standard germination and weight of seed dry matter. The prevalent weeds in the field were Oxalis sp, Galinsoga parviflora and Cyperus rotundus. The standard germination test was not a good method to assess seed vigor. Trifluralin was not detrimental to the accumulation of dry matter in seedlings. The accelerated aging test was effective to differentiate treatments, showing that seeds from non-weeded plots had less vigor than seeds from plots treated with EPTC + trifluralin.
Reference Key
silva1980plantaefeitos Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;J.F. da Silva;C.M. da Silva;L.M. da Costa;C.S. Sediyama
Journal anti-cancer agents in medicinal chemistry
Year 1980
DOI
10.1590/S0100-83581980000100003
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83581980000100003
Keywords
seeds herbicides

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