Control biológico de ceramidia viridis druce con hongos entomopatógenos y un insecticida botánico en el cantón Pasaje

At the plant health laboratory of the Agricultural Sciences Faculty of the University of Machala and Carmita Farm, from July to October 2005 were spread entomopathogenic fungi Metarrizhium anisopliae and Beauveria bassiana and a botanical insecticide was elaborated with extracts of Neem to test in laboratory and field conditions for the caterpillar control. The objectives of the present work were: 1. to es-tablish the effectiveness of the fungi Metarhizium anisopliae and Beauveria bassiana, for the control of Ceramidia viridis, at field and laboratory level; 2. to determine the time of action of the entomopath-ogenic fungi on the Ceramidia viridis. The fingi were cultivated on a substrate of rice cooked, in bottles of transparent glass, during 15 days, to reach the growth and the esporulation. The density of the co-nidia was determined in 1 g of the substance mother. The bioassays were carried out on larva that were collected from small to medium size (1 to 2 cm), totaling 48 per treatment, to establish the effective-ness of the products in different dates. The product Metarhizium was dosed to reason of l,5 ml/l, equivalent to 2 x 109 conidia/ml, and of Beauveria a gram for liter; with a sprayer was applied the suspension water-conidia on the larva confined in plastic boxes. In the field assay and in each treatment the suspensions of the fungi and the emulsion of the Neem-oil were applied with a sprayer. The experimental design for the bioassay was Completely Randomized and at the field of Blocks at random with same number of replication (dates of application) for treatment; to evaluate the mortality and the time in that these events took place, every 24 hours were registered the data. The results evidenced that the variance for the treatments was significant and that difference existed in the effectiveness, after correcting the mortality by means of the formula of Aboot. Under field conditions, with a time favorable, low brightness and high relative humidity, the effec-tive mortality registered 8 days after each application, having an aver-age from the 72 to 78 % with Metarrizhium and 67 % with Beauveria and superior to 85 % with Neem.

• المؤلف الرئيسي: Márquez Farías, Holger (author)
• التنسيق: bachelorThesis
• اللغة: spa
• منشور في: 2005
• الموضوعات: CONTROL BIOLÓGICO; HONGOS ENTOMOPATÓGENOS; INSECTICIDA BOTÁNICO; CANTÓN PASAJE
• الوصول للمادة أونلاين: http://repositorio.utmachala.edu.ec/handle/48000/108