Universidad Nacional Agraria La Molina. Facultad de Agronomía. Departamento Académico de Horticultura

El presente trabajo de investigación se realizó en el fundo “Santa Delfina” ubicado en el Valle de Casma, Ancash, con el objetivo de evaluar el comportamiento agronómico de ocho cultivares de pimiento tipo “Ancho” (Capsicum annuum L.) y determinar cuál de estos se adaptan mejor en términos de rendimiento y calidad de fruto. El diseño estadístico utilizado fue bloques completos al azar con ocho tratamientos y cuatro repeticiones. Hubo diferencias significativas en todas las variables evaluadas. Se concluye que los cultivares que presentaron mayor precocidad fueron Amazonas, Limeño y Máncora, con 20 días de ventaja en la cosecha. Los mejores cultivares para el rendimiento de frutos frescos por hectárea fueron Huizache, San Juan y Caballero con 55,71 ton/ha, 51,99 ton/ha y 51,71 ton/ha, respectivamente. Los que presentaron el mayor rendimiento comercial en seco fueron los...

The production and export of avocado fruits, cultivar Hass, has grown exponentially in recent years in Peru, however, a high incidence of symptoms such as regressive death, cankers on plant branches, and fruit rot have been observed affecting optimal crop production and fruit quality. These symptoms are mainly generated by Lasiodiplodia theobromae fungus, whose control is limited to a few active ingredients that tend to generate pathogen resistance. The present investigation had as objective to evaluate the inducing effect of resistance in the control of Lasiodiplodia theobromae in avocado (Persea americana) cultivar Hass of five bioproducts: ProtecSea, Barrera, Timorex Gold, T 22, Vacun Q Pro and water as a control treatment, with a total of 6 treatments with 4 replications, 3 avocado trees per replication.  One-year-old avocado trees cultivar Hass were used. Treatments were applied th...

Onion crop begins with seedling preparation and finishes with transplanting. In some Peruvian onion-productive areas, it is assumed that seedling thickness is important to have a better yield. Four different seedling thickness of red onion (Allium cepa L.) were evaluated between February and June 2017 in Santa Rita de Siguas, Arequipa, Peru. The seedling thicknesses evaluated were very thin (2.00 mm – 3.49 mm), thin (3.50 mm – 4.99 mm), standard (5.00 mm – 6.49 mm) and thick (6.50 mm – 7.99 mm). The plant density was 340 000 plants ha−1. The experimental design was a randomized complete block with four treatments and five replications. The variables evaluated were plant height (cm), leaf number, stemlike diameter (mm), bulb diameter (mm), total yield (t ha−1), and marketable yield categories (t ha−1). The leaf number, plant height, and stemlike diameter among treatments wer...

Botrytis cinerea Pers. (B.C.) is the phytopathogen responsible for a wide range of symptom in crops of great importance, such as tomato. Fungicide application are mainly used to control this pathogen; however, their excessive use leads to the development of resistant strains, environmental pollution, and harmful effects on human health. Thus, the aim of the study was to evaluate the effects of two foliar fertilizers contain copper, zinc, and citric acid to reduce gray mold B.C. damage in “Huascarán” tomato plants. In laboratory conditions, the effects of the foliar fertilizers on the inhibition of mycelial growth at 6 DAI (days after inoculation) with poisoned PDA (Potato Dextrose Agar) medium were evaluated; and in the field conditions, the foliar fertilizers were sprayed by eight weeks varying the application frequency in one and two weeks. The results showed that in laboratory co...