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This study aimed to evaluate the effect of different slurry volume of imidacloprid insecticide on the physiological potential during the storage of seeds of three soybean cultivars. A completely randomised experimental design was adopted, in a 6 x 3 x 2 factorial scheme, which treatments were six slurry volumes with imidacloprid insecticide (0, 200, 500, 800, 1 100 and 1 400 mL/100 kg of seeds), 3 soybean cultivars (SYN15630, M5947, and NS5959) and 2 storage periods (0 and 30 days after seed treatment), with four replications. The treated seeds were stored in kraft paper bags with controlled temperature and humidity. The physiological potential of the seeds was evaluated by standard germination test, electrical conductivity, accelerated aging, seedling emergence in the sand seedbed, and the field. The germination and vigor of soybean seeds were reduced during storage, especially with the increase in the volumes of the insecticide solution. [ABSTRACT FROM AUTHOR]

The objective of this work was to investigate, before and after chemical treatment, the interrelationships of the physiological quality tests in wheat grains. Following the chemical treatments with (i) carboxin thiram; (ii) carboxin thiram + thiamethoxam; (iii) carboxin thiram + thiamethoxam + bio-stimulant; (iv) pyraclostrobin + methyl thiophanate + fipronil, and (v) pyraclostrobin + methyl thiophanate + fipronil + bio-stimulant, subsequently the grains were assessed for their physiological potential. The physiological potential of the grains could be differentiated based on the electrical conductivity, seedling growth, and emergence in sand tests. In conclusion, the use of the active ingredients changed the correlation between laboratory tests with crop emergence in the sand as well as altered the relevance of the tests for sorting the treated grains into different physiological potential. But, the seedling growth tests and the electrical conductivity were, together, the parameters most relevant for explaining the data variability. [ABSTRACT FROM AUTHOR]

The objective of the present work was to evaluate the influence of the addition of a polinutrient fertilizer containing biostimulant elements in the industrial treatment on the physiological quality of soybean seeds, in two storage periods. The experiment was conducted using a completely randomized experimental layout, with treatments settled in subdivided plots and with four replications. While the plots were constituted by the industrial treatments, the storage periods (0 and 45 days) were allocated in the subplot. The seeds physiological quality was evaluated by employing the following tests: germination test, first count of germination, accelerated aging, speed of emergence-index, seedling emergence in sand substrate, seedling dry biomass and seedling length. Under the conditions tested, the seed storage period of 45 days provided reduction in vigour and germination, particularly in the untreated seeds (T1). Only the combinations of the treatments T5 (technology II + fertilizer), T6 (technology III), T7 (technology III + fertilizer) and T9 (technology IV + fertilizer) did not compromise the seed marketing potential after 45 days of storage. Immediately after seed treatment or after 45 days of storage, the addition of fertilizer of biostimulant action in the standard commercial industrial treatment guaranteed results of physiological quality higher than those observed in treatments conducted without this product, with a positive highlight for treatment T7 (technology III + fertilizer). [ABSTRACT FROM AUTHOR]