The Agricultural content portal. Check out: Updated news, Weather forecast, quotes, specialist systems for agricultural products, Columnists, General classifieds.

The Agricultural content portal. Check out: Updated news, Weather forecast, quotes, specialist systems for agricultural products, Columnists, General classifieds.
The Agricultural content portal. Check out: Updated news, Weather forecast, quotes, specialist systems for agricultural products, Columnists, General classifieds.
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RS already records 88 cases of soybean rust

Early incidence of soybean rust worries producers

Agrolink –Aline Merladete

Published on 02/01/2024 at 12:11 pm.

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At the beginning of the 2023/24 soybean harvest, Rio Grande do Sul faces a worrying challenge: the early incidence of Asian rust. According to data from the Antirust Consortium, the state has already recorded 88 cases of the disease, 96% of which were recorded before the pod filling phase (development stage R5), an atypical scenario compared to other regions of the country.

Researcher Cláudia Godoy, from Embrapa Soya, warns that excessive rain at the beginning of the harvest delayed the sowing of crops, placing them at different stages of development in January. This delay may have contributed to the early incidence of Asian rust, especially in crops sown later, where the fungus found favorable conditions to proliferate.

Godoy highlights that, even with the application of fungicides, producers have faced challenges in controlling the disease, highlighting management failures. She highlights the importance of careful choice of fungicides, considering that the fungus that causes Asian rust is developing resistance to the main groups of fungicides used.

Given this scenario, Embrapa recommends the use of fungicides in rotation, including multisite fungicides to increase control efficiency. Furthermore, the guideline is for chemical control to be carried out as soon as the first symptoms are observed, even during the vegetative period, respecting an application interval of 14 days between applications.


The article is in Portuguese

Brazil

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