Revista Brasileira De Herbicidas 2005; 4(2)
Selectivity of Diclosulam Herbicide Applied in Pre and Post-emergence over Several Sugarcane Cultivars
DOI: 10.7824/rbh.v4i2.27
The objective of this study was to evaluate the selectivity of diclosulam applied alone in pre or post-emergence to different sugarcane ratoons. The trial was carried out at Barra Bonita town, Brazil. It was used eleven different sugarcane cultivars, as following: RB 72 454, RB 82 5336, RB 83 5089, RB 83 5486, RB 85 5035, RB 85 5156, SP 70 1143, SP 71 1406, SP 79 1011, SP 80 1842 e PO 8503. The treatments used were (i) diclosulam at 200 g h-1 applied in pre-emergence; (ii) diclosulam at 200 g h-1 applied in post-emergence; and (iii) and an untreated check. Visual injury evaluations were done after applications. Technologic and productive parameters were analyzed at harvest timing, as Pol, Brix, fiber, straw diameter, straw number, straw length, straw and sugar yield. Only the cultivars RB 85 5035 and RB 85 5156 showed visual symptoms of intoxication provided by diclosulam in both applications pre or post-emergence. The symptoms disappeared completely during the sugarcane cycle. The technologic characteristics as Pol, fiber and Brix were not influenced by the diclosulam herbicide.
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