Revista Brasileira De Herbicidas 2012; 11(1): 119-125
Effects of glyphosate subdoses in seedlings of rubber tree (Hevea brasiliensis Aubl.)
This study aimed to evaluate phytotoxic effects of glyphosate subdoses in seedlings of rubber tree (Hevea brasiliensis Aubl.). One year after seedlings planting three reduced rates of glyphosate were studied, as follows: T1 – 86.4, T2 – 172.8 and T3 – 345.6 g e a ha-1 and T4 – control (without application). At 7, 14, 21, 28 and 180 days after application (DAA) of herbicide, scores were assigned for visual phytotoxicity, and in the last evaluation were took measurements of increase in height and in trunk diameter plants. Glyphosate drift in H. brasiliensis caused damage to the application at 345.6 g i.a ha-1 dose, reducing plant development in height and diameter, however, there was recovery in the growth of these plants observed after 180 days after herbicide application.
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