Control químico de malezas en arroz (Oryza sativa L) bajo riego en la zona de Babahoyo

VIII. SUMMARY The present experimental work was carried out on the grounds of the experimental farm "Palmar", located at Km 10.5 of the Babahoyo-Montalvo road. Objective: 1) Determine the degree of effectiveness of the herbicides used in the control of weeds in rice cultivation; 2) Identify the most effective and economic treatment in the control of weeds and 3) Evaluate the phytotoxic effect of the treatments on the crop. The types of herbicides studied were: herbicides graminicides and broad-leaved herbicides and cyperaceae. Conclusions: : it was determined that the most predominant weeds were Fimbristylis miliacea with 161,02 and Ischaemum rugosum with 76,72 plants/m2 with a high equivalent significance; The application of Fenoxaprop-p-ethyl caused the highest phytotoxicity to the culture at 7 and 14 days with values of 4, equivalent to moderate damage, the remaining treatments only caused phytotoxicity at 7 days with values of 1, equivalent to little damage; The most effective and economical treatment was obtained with the mixtures of Metsulfuron methyl + Bispiribac sodium with a control of 80,24; No treatment was effective to control Ischaemum rugosum; The highest number of tillers was obtained with the mixture of Pyrazosulfuron ethyl + pendimentalin with 452,00 tillers / m2; The highest plant height at 30 days was reported by the mixture of Bispiribac sodium + Pyrazosulfuron ethyl with 64,40 cm, while at 60 and 90 days the application of Quinclorac obtained the highest height with 113,23 and 138,97 cm respectively; The application of Quinclorac obtained the highest weight value of 100 grains with 27,35 g; The highest yield of the crop was presented with the mixture of Metsulfuron methyl + Bispiribac sodium with 6700,00 kg / ha; In economic analysis, satisfactory benefits were obtained, highlighting the mixture of Metsulfuron methyl + Bispiribac sodium with a net benefit of $ 1127,78.

• Autor principal: Mora Carbo, Alvaro Antonio (author)
• Format: bachelorThesis
• Idioma: spa
• Publicat: 2018
• Matèries: Control químico; Malezas; Arroz
• Accés en línia: http://dspace.utb.edu.ec/handle/49000/4132