Physiological Effects of Insecticides and Fungicide, Applied in the Treatment of Seeds, on the Germination and Vigor of Soybean Seeds

Abstract

The initial protection of plants through the use of insecticides and fungicides has been shown to be efficient for a good management of pests and diseases, however the molecules used in seed treatment have demonstrated a physiological effect on germination and initial vegetative development. The present work had as objective the evaluation of the physiological effect caused by two insecticides and a fungicide on the germination and vigor of the seeds. A randomized block design with six treatments and four replications was used. The treatments were: T1-water; T2-Rocks® insecticide; T3-Insecticide Cruiser 350 FS®; T4-Maxim XL® fungicide; T5-Rocks® + Maxim XL® and T5-Cruiser 350 FS® + Maxim XL®. The application of the treatments was performed according to the manufacturers’ recommendations and the percentage of germination of the seeds was evaluated, on paper and sand roll substrates, the rate of emergence, the total length of seedlings, the electrical conductivity of the imbibition and aging solution accelerated, with a later pattern of germination. The data were submitted to Analysis of Variance and the means were compared by the Tukey test. The results indicated that there were statistically significant differences for all variables except paper germination. The treatments that received the application of the Maxim XL fungicide demonstrated superiority, both in the evaluation of germination in sand substrate, and in the vigor evaluations of seeds and seedlings, while the treatments that received application of Rocks insecticide were inferior to the other.

Agronomic and efficacy evaluations of oxathiapiprolin as a soybean seed treatment

“…Bandara et al (2019) determined the combination of mefenoxam + fludioxonil did not improve seedling vigor in field testing. Costa et al (2019) determined that metalaxyl + fludioxonil treatments improved seedling vigor by measuring the total length of container-grown seedlings over time. The data presented in this manuscript describes a method for improving the precision of quantifying early vigor by evaluating the green pixels in UAV images that are converted into numerical data.…”

Role of the Fungicide Seed Dressing in Controlling Seed-Borne Fusarium spp. Infection and in Enhancing the Early Development and Grain Yield of Maize

“…The seed dressing, apart from being effective in ensuring the desired plant density, also allowed a faster growth of the plants than those of the infected control, as it controlled the systemic infection of both Fusarium species. Previous studies, which were only carried out under controlled conditions (greenhouse), have reported a significant effect of the application of a fludioxonil and metalaxyl-M mixture on the plant vigor of infected maize [14,29] or soybean [17,30], as quantified by a higher dry mass of both the shoots and roots. Moreover, Rodriguez-Brljevich [20] reported that a fungicide seed dressing suppresses the soil-borne infection of Fusarium spp.…”

Seed dressing with M451 promotes seedling growth in wheat and reduces root phytopathogenic fungi without affecting endophytes

“…Briefly, uniformly sized grains were washed in a solution of 4.5% (w/v) NaOCl:water (1:1 ratio) for 20 min. For the experimental groups, uniformly sized grains were treated with different concentrations of three different solutions: 1) 0.1% and 0.05% M451 (a water-based solution of TGV-28 [ Figure 1 ]; Human Microbiology Institute) in combination with 0.01% NaH 2 PO 4 (Sigma Aldrich, St. Louis, MO, USA) for 30 min, 2) 0.01% NaH 2 PO 4 for 30 min (Sigma Aldrich), and 3) Maxim XL v/v1:10 dilution in water for 12 h according to the manufacturer’s instructions (Syngenta Canada Inc., Guelph, ON, Canada) ( Costa et al., 2019 ; Pfeiffer et al., 2021 ). Subsequently, the grains from control and M451-treated groups were washed three times with autoclaved distilled water and then air-dried on filter paper.…”