THE EFFECT OF HERBICIDE 2, 4-D DIMETHYL AMINE 865 G/L ON WEEDS, GROWTH AND YIELD OF RICE PLANTS

Abstract

The existence of weeds without controlling on a rice (Oryza sativa L) field cultivation area can result in a large loss of rice production. Weed control using herbicide, was an effective way and a efficient way compared to other control techniques. This research aims to review the efficacy of herbicides 2, 4-D Dimethyl Amine 865 g/l on the growth of weeds in the cultivation of the rice paddies and influence 2, 4-d dimethyl amina 865 g/l on the growth and yield of rice. The experiment was conducted in Balendah Districts, Bandung Regency, West Java and the weed science laboratory at Padjadjaran University that lasted from December 2018 until march 2019. Experiment using the Randomize Block Design with 8 treatment and 4 replication. The type of treatment in this research consisted of: A (2,4-D Dimethyl Amine 865 g/l at a dose of 1,75 l/ha) B (2,4-D Dimethyl Amine 865 g/l at a dose of 1,50 l/ha) C (2,4-D Dimethyl Amine 865 g/l at a dose of 1,25 l/ha) D (2,4-D Dimethyl Amine 865 g/l at a dose of 1,00 l/ha) E (2,4-D Dimethyl Amine 865 g/l at a dose of 0,75 l/ha) weeding 3 and 5 week after planting, control (without weeding and without herbicides). The difference between treatments was tested using the Duncan test at real level of 5 %. The result showed that: Herbicide with active ingredients 2, 4 - D Dimethyl Amine is effective in controlling weeds found in rice plants and does not cause phytoctosisity of rice plants. Herbicide 2, 4-D Dimethyl Amine starting at a dose level of 0.75 l/ha is able to control the growth of weeds Ludwigia octovalvis, Marsilea crenata Presl, and Monochoria vaginalis (Burm. F.) C. Presl, starting at a dose of 1.00 l / ha is able to control weed Echinochloa cruss galli (L) Beauv, starting at a dose of 1.25 l / ha able to control Cyperus difformis, Cyperus iria L and Fimbristylis miliacea (L.) Vahl (L.) Vahle. Application of herbicide 2,4-D Dimethyl Amina 865 g./l had a good effect on the growth of the number of vegetative tillers per clump, the number of productive tillers per clump, the number of grains of rice per panicle, and the weight of the weight of dry milled grain.