The rizobacterias promoters of growth in plants are biofertilizers for agricultural crops, reducing the use of synthetic fertilizers. A trial was conducted With the objective of determining the effect of ten crops of Azospirillum spp. native to the height, aerial biomass and root of Zea mays L. "maíz" in greenhouse conditions. The previously isolated bacteria in the rizósfera of maize, were grown in nutritive broth for 24 hours and with the supernatant was obtained the inoculant standardized to 9 x 108 celmL-1, which was planted in broth soil extract 10%, tripticasa soya broth supplemented with tryptophan and broth Sundara Rao and Sinha Medium, to quantify the nitrogen fixed, indolacetic acid produced and phosphorus solubilised, respectively. In the greenhouse, the test was conducted as a completely random design with twelve treatments ten corresponding to the crops of Azospirillum, a ...

Fusariosis es una de las principales enfermedades que afectan el cultivo de tomate (Lycopersicon lycopersicum), siendo esta enfermedad causada por varias especies del genero Fusarium como Fusarium oxysporum f. sp. Lycopersici, Fusarium oxysporum f. sp. radicis-lycopersici, y Fusarium solani. En esta investigación se evaluó el efecto antagónico de una cepa de Trichoderma sp., sobre Fusarium sp., en plantas de tomate cultivadas en invernadero; además de comparar la acción biocontroladora de la cepa deTrichoderma sp con una alternativa química de control dada por el fungicida Benomilo y con una formulación comercial de Trichoderma viride. La cepa comercial de Trichoderma viride presentó una alta eficiencia protectora, con un 90% de sobrevivencia de plantas, la cual fue siempre superior a la cepade Trichoderma sp, que alcanzó al 70% de sobrevivencia. El fungicida benomilo ofre...

Fusarium is one ofthe main illnesses that affect the tomato crop (Lycopersicon lycopersicum) being this illness caused by several species of genre Fusarium como Fusarium oxysporum f. sp. Lycopersici, Fusarium oxysporum f. sp. radicis-lycopersici, y Fusarium solani. In this research the antagonistic effect of a Trichoderma sp. strain was evaluated, over Fusarium sp., in tomato plants cultivated in greenhouse; besides compare the biocontrol action of the Trichoderma sp strain with an alternative of control chemistry given for the fungicide Benomyl and with a commercial formulation of Trichoderma viride. The commercial strain of Trichoderma viride demonstrated a high protectress efficiency, with 90% of plants survival, which was always top to Trichoderma sp strain that reached 70% of survival. The benomyl fungicide offered a wide protection of tomate plants at fungus attack Fusarium sp bein...

Depression, anxiety and stress are multifactorial affective disorders that could manifest through a set of symptoms, both physical and psychological, that affect the quality of life and performance of people who suffer from them. In this sense, the present research had the objective of evaluating depression, anxiety and stress in students of the Faculty of Engineering of a Peruvian public university when returning to face-to-face classes. The research was developed under a quantitative approach and is of a non-experimental design of the descriptive cross-sectional type. The sample consisted of 244 students who responded to the Depression, Anxiety and Stress Scale, an instrument with adequate psychometric properties. According to the results, the students presented low levels of depression and anxiety. However, they showed moderate levels of stress. On the other hand, it was found out tha...

La propagación masiva de plantones de pino en los viveros forestales enfrenta problemas por enfermedades y deficiencias nutricionales. Por ello, la utilización de micorrizas inoculadas a nivel de la raíz a los plantones de pino es una alternativa ecológica y sostenible para mejorar la calidad de estos. El objetivo de esta investigación fue estudiar el efecto de las micorrizas y fertilización en el crecimiento de plántulas de Pinus radiata D. Don y determinar el tratamiento óptimo que permita el mejor crecimiento y desarrollo vegetativo. Se establecieron 8 tratamientos con 80 repeticiones; en donde, el T7 (15 mL de agua + S. luteus 1 g + Basacote Plus 1 g) mostró los mejores resultados en las variables de supervivencia (99%), altura (16.01cm), diámetro (2.09), peso de la biomasa fresca aérea y radicular  (1.86 g y  0.45 g); índice de lignificación (24.26) y índice ...