Influencia del tamaño de gota para controlar antracnosis con dos fungicidas en cultivo de cacao

The Ecuador possesses approximately 490 000 hectares of cocoa and one of the main exporters is of this raw material between them the thin aroma cocoa turning to the cocoa in a source of economic sustenance for many farmers in the coastal zone of the country, in spite of it this cultivation has seen affected its production and yield for many illnesses provoked by fungi that they attack to the cocoa tree with more incidence in places where the relative moisture is high developing a suitable ambience so that these organisms develop and so there affect physiologically its sheets, stem and fruits between them that of the genre Colletotrichum that represents an economically important group of pathogenic fungoid of plants and plants guest registers from approximately 2.200 species, these pathogenic of plants Colletotrichum spp. there are the main cause of the antracnosis, as well as of the fruits putrid ones pre and he postharvests, of the illnesses of the sheets and of l % of the seedlings while in case of the cocoa plants it attacks to the sprouts, sheets and stems most exposed to the sun, particularly to those of the glass of the tree, what limits the development and the production of the plants causing dry injuries with yellow rims that normally spread from the rim up to the center of the sheets, possibly damaging them completely, and then the sheets fall down, leaving the naked branches. This stimulates the growth of new branches that also are infected, that finally take the appearance of small brooms, it is necessary to indicate that the Iniap mentions that the illnesses of the cob of cocoa in the Ecuador keep on causing direct losses in the production. At present the control of these illnesses is carried out by means of cultural works and with the application fungicides protectantes, being necessary to look for new opportunities of chemical control with the use of new existing systemic fungicides on the market and of the use of new hardware for the application as the bombs of rucksack and of engine for it in this investigation there came to decide the influence of the size of drop to control antracnosis in fumigations in cocoa cultivation and the specific doses for the applications of the fumigations in cocoa cultivation analyzing the efficacy of the pulverizations with bombs of rucksack and of engine for it the investigation was carried out in the following conditions of the areas of natural life of Holdridge that corresponds to a very dry forest – Tropical (bms – T), with a 500 mm annual average precipitation, an annual average temperature of 25th C and heliofanía from 2 until 3 daily hours establishing a block essay at random to 95 % of reliability by means of Tukey in which there is analyzed the growth of the sprouts of cocoa with fumigations against the illness to 15, 30 and 45 days with the fungicides T1: Topsin Kinetic, T2: Comet Kinetic, T3: Topsin 70, T4: Comul and the T5: Witness, in whom the Treatment was more significant than other treatments while the most effective device descriptively was the bomb of rucksack which ends that Topsin Kinetic was significant during 45 days of application.

• Autore principale: Camacho Guaman, Fabian Eduardo (author)
• Natura: bachelorThesis
• Pubblicazione: 2017
• Soggetti: CACAO; BOMBA; MOTOR; TOPSIN
• Accesso online: http://repositorio.utmachala.edu.ec/handle/48000/11693