Evaluación de dosis crecientes del gel de aloe vera sobre mycosphaerella fijiensis, bajo condiciones de campo y laboratorio

In the present research work is analyzed the response of the Sigatoka (Mycosphaerella fijiensis M.) to the implementation of increasing doses of aloe vera gel, evaluating in banana templates 3.5 months of age, with 4 to 5 functional leaves of the variety Williams. The same that took place in the grounds of the Experimental Farm "Santa Inés" belonging to the Academic Unit of Agricultural Sciences, from the Technical University of Machala. Due to the problem of global black sigatoka in banana, reduces the photosynthetic process and cause necrotic lesions on the leaves, that are expanding aggressively producing a rapid deterioration to the leaf system affecting the filling, weight and premature ripening of the bunch, whether in the field (fruit Creamy) or during the transport to the destination markets. This fungus (Mycosphaerella fijiensis M.) cause loss in performance between 50 and 100%, significantly affecting the economy of the producer. The excessive use of fungicides in agricultural crops, have developed a system of fungal resistance before these products, environmental pollution and public health risks, therefore there is a need to find new ways to control this fungus as are the extracts and essential oils of plants which have a biological origin, are biodegradable and have a minimum negative impact on the environment and human health. The overall objective of this research was to evaluate the effect of the gel of Aloe Vera IN BLACK SIGATOKA CONTROL (Mycosphaerella fijiensis Morelet.) in the cultivation of banana. For the which were collected banana leaves infected with the fungus of the Sigatoka (Mycosphaerella fijiensis Morelet.), and was isolated in-vitro level, using as a means of growing potato dextrose agar (PDA), evaluating the different concentrations of the Gel. For the in vitro test was performed 6 treatments with 6 replications, taking as a variable, the radial growth of the mycelium of the fungus (Mycosphaerella fijiensis Morelet), the evaluated doses were T1 (1000ppm), T2 (5000ppm), T3 (10000ppm), T4 (50000ppm), T5 (Mancozeb) and T6 (Witness). We used a completely randomized design (DCA). The variables were evaluated every 10 days after inoculation in a period of 20 days. According to the results of the dose that presented an antifungal is the T4 (50000ppm). In the field phase was the implementation of the Aloe Vera gel by the method of single sheet, for each treatment in the sheet 1 and sheet 2, which later will change its position, with a randomized complete block design (RCBD) For the test was conducted 6 treatments with 12 repetitions, assessing the variables every 7 days and up to when the witness present burning of 80% as: stadiums, number of hints and area under the curve of the progress of the disease (AUDPC). The evaluated doses were: T1 (1000ppm), T2 (5000ppm), T3 (10000), T4 (50000), T5 (Mancozeb) and T6 (Witness). According to the statistical results T4 (50000ppm) presented the smallest area under the curve of the progress of the disease (AUDPC) giving us greater control antifungal.

• Autore principale: Pardo Luna, Marco Andres (author)
• Natura: bachelorThesis
• Pubblicazione: 2017
• Soggetti: ALOE; VERA; MYCOSPHAERELLA; PDA
• Accesso online: http://repositorio.utmachala.edu.ec/handle/48000/10592