Abstract
Seed treatment is the most efficient technique for controlling pests and pathogens that can influence the initial development of the crop. However, storing treated seeds may damage the physiological quality. Thus, the objective of this study was to evaluate the influence of storage on the physiological quality of treated soybean seeds and on the morphology of soybean seedlings. The treatments were carried out with Fludioxonil, Imidacloprid and Anthranilic Diamide, in the dosage of 200, 150 and 100 mL of the commercial product 100 kg of seeds, respectively, from the cultivar BRSMG752S. The experimental designs used were randomized blocks (greenhouse) and completely randomized (laboratory), in a simple factorial 4x4scheme, with 4 sowing times (30, 20, 10 and 0 days after treatments) and 4 treatments (3 products and untreated seeds) with 4 repetitions. The treatment of soybean seeds with Anthranilic Diamide submitted to different storage periods was the one with the closest physiological quality to the treatment without application of agrochemicals. The soybean seeds treated with Imidacloprid showed a reduction in physiological quality with the storage time, reduction (in general) in the root length and presented a lower seedling length at 20 days of storage.
Highlights
The cultivation of soybean (Glycine max (L.) Merr.) has great importance in the national scenario, both for social and economic reasons
Four treatments were carried out: Treatment 1 - Seeds treated with the fungicide Fludioxonil (200mL of the commercial product per 100kg of seeds); Treatment 2 - Seeds treated with the insecticide Imidacloprid (150mL of the commercial product per 100kg of seeds); Treatment 3 - Seeds treated with the insecticide Anthranilic Diamide (100mL of the commercial product per 100kg of seeds); and Treatment 4 - Untreated seeds
Through the analysis of variance, significant effects were observed for the interaction, treatments and planting times
Summary
The cultivation of soybean (Glycine max (L.) Merr.) has great importance in the national scenario, both for social and economic reasons. The attraction for this consumption of soybean is determined mainly by price, among others, and by fatty acid composition (Águila, 2018). Seed treatment has a relatively low cost and the environmental impact is reduced due to the small area that receives the product compared to the application of agrochemicals in the aerial part of the plant (Cunha et al, 2015). ST is advisable to protect seeds from attack by insect pests and microorganisms, Brazil does not have standards that make it mandatory (Peske, Lucca-Filho, & Barros, 2006)
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