Light is a determining factor in plant morphophysiology, as it influences the growth and development of agricultural crops. Thus, the objective was to investigate the effects of light sources on the growth and development of "biquinho" pepper cultivars. The experiment was performed in two stages (Exp1 and Exp2), evaluating two cultivars (BRS Moema; Airetama biquinho) in five light sources (white LEDs, red LEDs, blue LEDs, red/blue LEDs, and fluorescent lamps).In Exp1 the plants were kept in a controlled condition, with a completely randomized design, in a 2x5 factorial scheme (cultivars x light sources) until 76 days after emergence (DAE), in which growth variables and photosynthetic pigments were evaluated. In Exp2, the plants were removed from the above conditions and transplanted in pots, being kept in greenhouse for more 76 DAE. At 152 DAE, the same variables as Exp1 were evaluated, as well as gain of shoot fresh and dry mass, and gain of root fresh and dry mass. In both experiments, growth variables were affected by cultivar and the light sources, however, the behavior did not follow the same trend for all variables, indicating that the light quality influences the growth of the crops, and impacting during greenhouse conditions.

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Common beans are an important protein source for human diet. Much cultivated in small farms it is considered a subsistence crop, employing little cultivation technology. It presents a high susceptibility to temperatures above 28 °C in reproductive periods, causing abortion of plant parts due to the high temperature triggering the plant ethylene synthesis. The agroclimatic zoning for culture does not emphasis on air temperature, which affects the crop. With these assumptions, the aim of this work was to evaluate the high temperature thermal risk for the bean crop in Cruz Alta, Passo Fundo and São Luiz Gonzaga. From the maximum air temperature data obtained since 1961, we obtained the average frequency of days at which the maximum air temperature was equal or greater than 28 °C in ten-day periods. The bigger thermal risk was found in the third ten-day period of January and in the last ten-day period of December. Passo Fundo showed the better thermal conditions for bean crop. São Luiz Gonzaga, even during periods not indicated for the culture, during winter, still showed happen at least one day of thermal risk.

The production of strawberry in the semi-hydroponic system still has several unknowns to be answered, one of them is to make the system less costly because this crop has a high implementation cost. The choice of the ideal substrate is one of the biggest doubts of the producer, as it can generate high costs when purchased commercially. For this, rice husk becomes an alternative to replace other substrates because it is an easily available and inexpensive material in rice regions of Brazil. The objective of this work was to evaluate and compare the productive performance of strawberry cv. Albion cultivated in different substrate compositions under the semi-hydroponic system. The exclusive use of charred rice husk was not beneficial because it reduced growth variables and crop yield. In the production of strawberry cv. Albion in polypropylene gutter system, the use of 25% commercial substrate amount is enough to maintain the productivity and quality of pseudofruits, in addition to further reducing the system implementation costs by using charred rice husk as substrate constituent. Include the abstract in English.

Aloysia hatschbachii is an endangered species that occurs endemically in Paraná and has potential for essential oil production. Expanding research on threatened species could serve as a tool to ensure their conservation, management and reproduction. In this study, we sought to evaluate phenological phases (phenophases) for species Aloysia hatschbachii in the years 2018 and 2019 by conducting monthly checks of a plant population consisting of 5 individuals, identifying the phenological events  of budding, mature leaves, flowering, fruiting, leaf senescence and leaf fall, using the percent index of intensity as well as the index of activity in the sampled individuals regarding the occurrence of such phenomena, and then correlating phenological data with meteorological variables. The phenological phases showed synchrony in activity throughout most of the assessed period, but were not always synchronous in intensity. Budding occurred between July and April, and mature leaves were present all year round. The patterns of leaf senescence and leaf fall revealed that the species has nondeciduous characteristics. These phenophases were influenced by relative air humidity. Flowering occurred between November and April, while fruiting lasted from December to May, with the reproductive stage being influenced by air temperature and by incident solar radiation.