T. Mahakavi, R. Bakiyaraj, L. Baskaran, Nusrat Rashid, K. Sankar Ganesh, Effect of Herbicide (Quizalofop-p-Ethyl) on Growth, Photosynthetic Pigments, Enzymes and Yield Responses of Blackgram (Vigna mungo L.), ILNS Volume 9, International Letters of Natural Sciences (Volume 9) https://www.scipress.com/ILNS.9.58 Abstract: The recent experiment was conducted to assess the effect of herbicide (quizalafop-p-ethyl) on growth, photosynthetic pigments, enzymes and yield of Black gram (<i>Vigna mungo</i> L.) during the summer season 2013-2014. This experiment comprised black gram (variety ADT 3) and different concentrations of herbicide (quizalafop-p-ethyl) treatments compared with control. Reduction in growth, photosynthetic pigments, enzymes and yield parameters were observed with 0.5 % herbicide application followed by 1 %, 1.5 % and 2 %, out of all treatments 0.5 % shows least reduction. Thus, 0.5 % herbicide application is the safest way for weed control in Black gram field as it showed least adverse effect on growth, photosynthetic pigments, enzymes and yield of crop when compared with other treatments. Keywords: Catalase, Herbicide, Peroxidase, Pigments, Quizalafop-p-Ethyl, <i>Vigna mungo</i> L.