El tomate es cultivado en todos los continentes y representa una de las principales fuentes de vitaminas y minerales, lo cual lo hace muy apetecido en el consumo diario de los hogares. Ante el resurgimiento de nuevas plagas en el cultivo de tomate los productores aplican indiscriminadamente plaguicidas, provocando efectos negativos para el ambiente y la salud humana. El objetivo fue diagnosticar el uso e impactos de plaguicidas en el cultivo de tomate en la parroquia Riochico, cantón Portoviejo, provincia de Manabí, Ecuador. Se utilizó el método deductivo e inductivo, sobre los agricultores dedicados a la actividad tomatera, lo cual permitió diagnosticar, describir y determinar el impacto en la sostenibilidad agroecológica por el uso indiscriminado de plaguicidas. Los resultados mostraron que las aplicaciones de plaguicidas se las realiza sin criterio técnico y se sitúan entre 35...

The present work has as its main objective to evaluate the potential of the use of physic nut (Jatropha curcas L). for the generation of biofuel, through a literature review. The physic nut is a shrub of economic importance, due to its various industrial uses. It is relevant for the development of bioenergy, due to the high concentration of oil in its seeds, which is why it is used for the production of biodiesel, while the shells of its fruits can be considered for the production of ethanol due to its high cellulose content. The cake obtained after the oil extraction process is a useful organic by-product that contains considerable amounts of macro and micronutrients, being suitable for agricultural use as organic fertilizer, and if the cake goes through a detoxification process, it can be used as animal feed.  

Cotton is a very demanding plant at a nutritional level; for this reason, it is necessary to carry out an effective application of fertilizers, standing out in recent times as those of organic origin. The main of this research was to evaluate, through a literature review, the importance of organic fertilization in the sustainable production of cotton cultivation. It was used in the study of 44 scientific documents from the Scielo, Redalyc, Latindex, and Scopus databases. The search for scientific manuscripts was comprised in the period between 2002 and 2022, using keywords in both Spanish and English: ¨cotton¨, ¨origin of cotton¨, ¨cotton distribution¨, ¨benefits and uses of cotton cultivation¨, ¨vegetative cycle of cotton¨, ¨cotton phenology¨, ¨effects of organic fertilization in cotton cultivation¨.¨nutritional requirements of cotton cultivation¨, ¨mineral and organic ...