Abstract
Treatment of early seeds, using new combinations of chemicals has been increasingly adopted, however, its effects on seed quality during storage are still not completely understood. The aim was to evaluate the physiological seed quality of two soybean cultivars treated with different combinations of chemical products during the storage period. The experiment was arranged in completely randomized with four replications in a factorial 7x5 design for each cultivar, with seven seed treatments and five evaluation periods (times) during storage (0, 60, 120, 180 and 240 days). The treatments were: 1) fipronil + pyraclostrobin + methyl thiophanate; 2) imidacloprid + thiodicarb + carbendazin + thiram; 3) abamectin + mefenoxam + fludioxonil + thiamethoxam + thiabendazole; 4) carbendazin + thiram; 5) fludioxonil + mefenoxam + thiabendazole; 6) carboxin + thiram and 7) control (no treatment). The physiological seed quality was evaluated by the following tests: germination, accelerated aging, seedling emergence in sand and shoot and root length of seedlings. The physiological quality of soybean seeds decreased during storage in all treatments (including the control). The treatment with the insecticides imidacloprid + thiodicarb associated with the fungicides carbendazin + thiram markedly reduces the physiological seed quality of the tested soybean cultivars.
Highlights
The industrial seed treatment process associate equipment and the use of innovative techniques such as the use of new formulations containing fungicides, insecticides and nematicides in the same treatment, as well as its carrier, which can maximize the efficiency of the products, help protect operators and avoid contamination of the environment (BRZEZINSKI et al, 2017)
An anticipation of the chemical treatment can reduce seed vigor and even germination during storage, due to the possible phytotoxic effect some active ingredients of the products can have on the seeds (PEREIRA et al, 2018; ABATI et al, 2020)
The study of new combinations of formulations applied in the industrial seed treatment as well as their effect on seed quality during storage is imperative
Summary
The industrial seed treatment process associate equipment and the use of innovative techniques such as the use of new formulations containing fungicides, insecticides and nematicides in the same treatment, as well as its carrier, which can maximize the efficiency of the products, help protect operators and avoid contamination of the environment (BRZEZINSKI et al, 2017). An anticipation of the chemical treatment can reduce seed vigor and even germination during storage, due to the possible phytotoxic effect some active ingredients of the products can have on the seeds (PEREIRA et al, 2018; ABATI et al, 2020). This phytotoxic effect alters the seed quality, reduces germination,vigor and seedling emergence and impairs plant establishment and crop yield (FERREIRA et al, 2016). The study of new combinations of formulations applied in the industrial seed treatment as well as their effect on seed quality during storage is imperative. The purpose of this study was to e valuate the physiological seed quality of two soybean cultivars (BRS 360 RR and BRS 284) treated with different combinations of chemical products (inseticide, fungicide and nematicide) during the storage period (0, 60, 120, 180 and 240 days)
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