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Corteva invites researchers to conduct studies and analyze Vessarya
Oct. 24, 2019
By Leonardo Gottems, Reporter for AgroPages
Professors and researchers from universities and research institutions in the state of Rio Grande do Sul were invited by Corteva to analyze and experience the differentials and superior performance of the Vessarya fungicide against Asian rust and other soybean diseases.
The situation is presently worrying because the winter was not strong enough in southern Brazil and many voluntary soybeans survived the cold, thus serving as a host for the fungi.
“Even if the farmer plants early, he should be very careful with soy farming, providing more robust treatment and taking care of the application. Compared to the main products in the market, [Vessarya's] results were quite satisfactory. But it is important to adopt strategies, such as the adoption of reinforcements with multisite fungicides,” said Carlos Forcelini, PhD in Phytopathology and researcher at the University of Passo Fundo (UPF).
According to him, one of the interesting aspects of Vessarya is that it is composed of two molecules, a strobilurin and a carboxamide. He said, “Although resistance to picoxystrobin has already been detected, it still shows an interesting efficacy. Another differential is the product formulation, which does not require the use of adjuvant oils or other products.”
Carolina Deuner, also a UPF researcher and Ph.D. in Plant Pathology, also found evidence of the effectiveness of the fungicide, Vessarya. “Of the four fungicide applications that soybean growers make in our region, we tested two - the second and the third - with Vessarya. This is when the problem [of Asian rust] rises, and it is necessary to apply the product more efficiently, which is the case of carboxamides, making Vessarya a great option,” she pointed out.
Deuner recalled that no new molecules are expected to be released in the medium term, which makes it necessary to combine treatment with multisite fungicides. “We compared Vessarya with another fungicide in the same category, and we obtained a superior result, especially working within a fungicide alternation program.”
Dr. Caroline Wesp, a researcher at CCGL Tecnologia, revealed that she compared Vessarya with the main products in the market and investigated the best positioning in relation to the moment for application. “What we found is that it has good Asian rust control, equivalent to other competing fungicides. As for positioning, it is better when rust occurs,” he explained.
Agronomist, Felipe Hunhoff, tried Vessarya in the Procampo Experimental Area and attested to the agronomic effectiveness of the product. “In the visual, we could keep the leaf greener until the end, and saw lower disease severity, which translated into higher productivity. It is a great tool to manage soy for greater yield,” he concluded.
Source: AgroNews
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