Caracterización morfológica de hongos fitopatógenos en el cultivo de cebolla larga (allium fistulosum) sector lasso, cantón Latacunga, Cotopaxi 2015

The development of this present work is the morphological characterization of pathogenic fungus on the green onions crop (Allium fistulosum) from Lasso sector with coordinates: 0° 45' 11.30" latitude S, 78° 36' 39.53" longitude W, to a height of 2850 mnsm; in the Latacunga canton, Cotopaxi province, 2015; as the research results were determined that the phytopathogenic fungus is causing greater impact on crop production of long onion (Allium fistulosum). It is dominated Mildiu (Peronospora destructo.). can cause yield reductions of 30% to 70%. This was reached by making a determination of field, itself that was based on own criterion and bibliographic help got. Peronospora destructor is a causative pathogen of a disease whose characteristic symptom. It is the appearance on the leaves at oval or cylindrical areas of green, yellow, pale brown color. Initially, the symptoms can appear on the adult leaves, and is got a long, dull pale stain. The experimental work was made in the laboratory implemented of the Latacunga city, with coordinates: 0 55' 44.8" latitude S, 78° 37' 24.2" longitude W, to a height of 2850 mnsm, place which is performed the characterization macro structure, themselves that are presented at beginning a mycelium of white color, itself which was developed to the surrounded point, all crop medium, itself which its mycelium took a greyish color. Themselves that were looked with an Olympus CX31 trinocular microscope, coupled with an INFINITY 1-2CB camera with increases of 40x, 100x, 200x, 1000x, It was characterized by Peronospora destructor fungus, their micro structures are characterized by branched sporangiophores not accepted and from purplish colors, with a length of 100.42 μm and 13.56 μm wide, and as soon as its life cycle, this gender has spores with dimensions of 9.62 μm, into average to fourth day of infection.

• Glavni autor: Caicedo Yánez, Xavier Alejandro (author)
• Format: bachelorThesis
• Jezik: spa
• Izdano: 2015
• Teme: CARACTERIZACIÓN MORFOLÓGICA; HONGOS FITOPATÓGENOS; CEBOLLA LARGA; ALLIUM FISTULOSUM; CULTIVO
• Online pristup: http://repositorio.utc.edu.ec/handle/27000/2510