Princípios de medicina de catástrofe em revisão a partir de Fukushima

Silva, Rita Marques da; Campos, Paulo Fernando de Souza; Reis, Ana Mafalda; Bandeira, Romero

doi:10.14195/1647-7723_22_19

Cited by 1 publication

(1 citation statement)

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“…Due to the alteration of the sensitivity of P. pachyrhizi to specific fungicides site (demethylation inhibitor, quinone outside inhibitors and succinate dehydrogenase inhibitors) and since fungicides with new mechanisms of action are not available, multisite fungicides (mancozeb, chlorothalonil, copper sulphate, among others) were used in the management of ASR, in formulated mixtures or tank mixtures with those of specific site, in order to increase the control efficiency, as well as to mitigate the resistance risks of the fungus (Juliatti et al, 2017;Godoy et al, 2016, Silva et al, 2015, Gullino et al, 2010. The fungicides with multisite action interfere in several cellular functions, being classified as immobile and acting as a protective surface barrier to infection, so they are non-penetrating or immobile, and when applied to the aerial parts they are not absorbed and therefore are not translocated, remaining on the surface of the plant where they were deposited (Reis et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Use of Surfactant With Different Volumes of Fungicide Application in Soybean Culture

et al. 2018

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Application volume, adjuvants that act on the drop surface tension and droplet spectrum are the main factors affecting leaf surface coverage and the spray penetration droplets inside the canopy of the soybean crop, which may have an impact on fungicide efficiency, since those used in the handling of Asian-rust, including those that are absorbed by the plant, present a small displacement from the point of deposition. Thus, it was sought to determine the impacts on the use of the organosilicone surfactant compared to the changes in the spray volumes. For that, five spray volumes and the combination of two adjuvants were compared in randomized blocks with a factorial arrangement 5x2. Reductions in volume negatively impacted the number of drops cm-2 affecting the leaf surface cover which did not exceed 13% in the lower third, in the absence of the surfactant. Also, the reduction in the volume provided decreases in the control of Asian-rust, and the use of surfactant minimized the negative impacts of the disease, reflecting on the index of the leaf area which varied up to 6.5 times on changes in the spray volume, and up to 2.8 times against the use of the surfactant in relation to the mineral oil isolated. Grain yield was negatively affected as reductions in the spray volumes, occurred with less impact when the surfactant was used. Thus, coverage of the leaf surface and the number of drops cm-2 along the plant profile respond to the addition of the surfactant and to the increase of the spray volume, having relation with the control of soybean Asian-rust, and affecting the leaf area index and productivity.

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Section: Resultsmentioning

confidence: 99%