<![CDATA[The aim of this study is to know the effect of the varying herbicide concentrations in the level of weed mortality which is senduduk (Melastoma malabathricum). The method used in this study is the direct application in the field and the observations conducted on the mortality rate is based on changes in morphology such as weed leaves and stems. This research was conducted in two groups, namely: 1) the application of herbicides with the active ingredient 20% methyl metsulfuron was given at the concentration of 2.5 g/10 liters of water, 5 g/10 liters of water and 7.5 g/10 liters of water; and 2) application of the herbicide with the active ingredient of 0.7% methyl metsulfuron was given at the concentration of 1.0 g/10 liters of water; 1.5 g/10 liters of water; 2.0 g/10 liters of water. Results showed that the application in the first group with a concentration of 5 g/10 liters of water and 7.5 g/10 liters of water controlled weeds by damaging the tissue leaves as well as the stems of weeds and also it was more economical and it takes 28 days after spraying to control the weeds. While in the second group with a concentration of 1.0 g/10 liters of water and 2.0 g/10 liters of water controlled the weeds by damaging tissue leaves and stems of weeds, but the most economical is at a concentration of 1.5 g/10 liters of water, because this treatment is capable of causing damage to the leaves and stems of weeds within 24 days after spraying.]]>
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