Revista Brasileira De Herbicidas 2015; 14(4): 306-314
Morphoanatomic characteristics of the sugarcane’s leaves under residual effect after ripeners application
The aim of this study was to evaluate the residual effects regarding the maturing on morphoanatomic characteristics relating the sugarcane’s leaves. The experimental design was a randomized block in a split plot. The plots were constituted by the following varieties of sugarcane (SP80-3280 and SP80-1842) and the subplots of different maturings: Curavial 20 g bw ha-1 (sulfomethuron-methyl); Curavial 20g bw ha-1 + Roundup 0.15 L ha-1 (sulfomethuron-methyl + glyphosate); Ethrel 0.67 L ha-1 (etephon); Ethrel 0.67 L ha-1 + Roundup 0.15 L ha-1 (etephon glyphosate +); Moddus 0.80 L ha-1 (ethyl-trinexapac); MTD 1,0 L ha-1 (Compounds of organic carboxylic radicals); MTD 1.0 L ha-1 + Roundup 0.15 L ha-1 (Compounds of organic carboxylic radicals + glyphosate); Roundup 0.15 L ha-1 (glyphosate); and check without application. The following quantitative parameters of the tissues were measured: thickness of the epidermis of the adaxial face; thickness of the epidermis of the abaxial surface; thickness of the mesophyll; blade thickness; diameter of the xylem; diameter and phloem. In general, the foliar morphoanatomic characteristics of the sugarcane showed higher average values for the residual effect of Ethrel maturing (etephon). The SP80-1842 variety demonstrated the highest values for most characteristics under study.
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