Resumo

SOLIS-MERA, Julián A.. Response of three Rubus spp. cultivars in their stages of vegetative and reproductive growth under macro tunnels. Acta Agron. [online]. 2021, vol.70, n.4, pp.394-406.  Epub 10-Abr-2023. ISSN 0120-2812.  https://doi.org/10.15446/acag.v70n4.92460.

Macro-tunnel technology is an alternative that reduces the impact caused by climatic conditions and the incidence of pests and diseases, improving yield and quality. The objective of the work is to evaluate the response of the three Rubus spp. Cultivars in their vegetative and reproductive growth under macro-tunnel, as well as the incidence and severity of pests and diseases, to find the characteristics of each cultivar that allow them to be differentiated morphologically and phenologically. Through an analysis of variance, it is determined that the cvs. San Antonio and Castilla present similar morphological characteristics; while the cv. Brazos is characterized by being a rustic cultivar which presents the highest fruit weight (10.60 g) and yield (179.03 g/ plant/cycle-4), however, it is the one that presented the lowest soluble solids (5.8 °Brix) in comparison with ‘Castilla' that reaches the highest value (10.88°Brix). Regarding the phenological development, the earliest is ‘Brazos' (155 days from transplant to harvest) and the latest is ‘Castilla' (169 days). On the other hand, the results show that on average the temperature inside the macro tunnels increases from 5 to 10°C, and these conditions are inadequate for the development of the crop, favoring the incidence and proliferation of diseases such as powdery mildew and pests such as aphids. ‘Brazos' is characterized by having a high resistance to pests (1 %) and diseases (11%); while ‘Castilla' is the most susceptible cultivar with a high incidence (76%) and severity (12%).

Palavras-chave : Greenhouse; morphology; phenology; plagues; diseases; yield.

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