Controle de grama-bermuda (Cynodon dactylon (L) Pers) em fruticultura: II- combinação de cultivo mecânico e controle químico
Palavras-chave:
grama-bermuda, erva-problema, capim-marmelada, enxada-rotativa, tratamentos-químicosResumo
An experiment was carried out in Viçosa in order to determine the effect of the combination of cultivation methods with applications of Dowpon-S for the control of bermuda grass. The following treatments were designed: conventional plowing and harrowing, plowing and harrowing followed 24 days later by hoe cultivation, and third, rotary plowing. Three monts after the mechanical treatments, Dowpon-S was applied as spray at four different rates: 0 kg/ha, 4.4 Kkg/ha, 8.82 kg/ha and 18.31 kg/ha of the commercial product.
Samples were taken of all living parts of the bermuda grass found in an area of one square meter within each suplot. Each sample was dried at 70°C until it reached constant weight before being registered. Two samplings were made: the first two months after the application of the herbicide and the second three and a half months after the first. Right after the first sampling, the whole area was mowed and cleaned in order to avoid the interference of debris with the reaction to each treatments, expressed by the regrowth of the bermuda grass. The following conclusions reached:
1. The best tillage treatments were the conventional plowing and harrowing and the plowing and harrowing followed 24 days later by hoe cultivation.
2. The best chemical treatments were the applications of Dowpon-S at the rates of 8.72 kg/ha and 18.31 kg/ha.
Referências
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