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Irrigated rice: The importance of using pre-emergent herbicides

The initial management of the crop is essential for high yields, it must be thought of as a system that encompasses well-defined planning and actions.

Rice is one of the most produced and consumed cereals in the world. In Brazil, Rio Grande do Sul is the largest state producing the crop, with an average share of 70% in national production, followed by Santa Catarina.

Rice productivity can be affected by some factors, such as inadequate soil and water management, weed incidence and low quality seeds.

When it comes to weeds, the application of herbicides in pre-emergence is increasingly becoming a profitable alternative, since it provides less competition for water, nutrients and light since the beginning of the crop's development.

What is the ideal time to apply?

The ideal application time is the S3 stage, also known as the “needle point” of rice plants. To choose the pre-emergence and its respective dose of use, we took into account the type of soil, sowing time, climatic condition and history of predominant weeds in each area, as well as possible resistance to certain chemical groups.

Does the use of pre-emergence replace the use of post-emergence herbicides?

The use of pre-emergence does not replace the use of post-emergence herbicides, they are only responsible for delivering the crop with a smaller number of plants, which leads us to obtain a more efficient control. As we can see in an already established farm:

Campo de terra Descrição gerada automaticamente

Management must be thought of as a production system that encompasses the use of certified seeds, well-planned crop rotations, the use of herbicides with different mechanisms of action and the correct use of pre-emergents.


To be successful in rice farming, there is no isolated practice that delivers a weed-free crop with high productive potential, but the sum of well thought-out actions. Planned attitudes give us sustainability, safety and longevity in the activity.

Developed by Agência Jung

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Referência: 14/05/2021
Produto Último Máxima Mínima Abertura Fechamento %
[CBOT] Arroz 13,42 13,33 -0.22%
[CBOT] Farelo 431,5 423,5 0.00%
[CME Milk Futures] Leite 18,87 18,99 18,87 18,98 18,88 -0.79%
[CBOT] Milho 692,5 718,75 685 717,25 685 -4.73%
[CBOT] Óleo de Soja 68,59 68,41 +0.54%
[CBOT] Soja 1602,5 1625 1620,75 1625 1603,75 -0.53%
[CME Lean Hog Futures] Suínos 111,15 111,575 111,15 111,45 111,15 -0.29%
[CBOT] Trigo 737 730,25 727,25 730,25 727,25 +0.10%
Referência: 13/05/2021
Produto Último Máxima Mínima Abertura Fechamento
[CME Milk Futures] Leite 18,95 19,1 18,94 19,05 19,03
[CBOT] Arroz 13,765 13,36
[CBOT] Farelo 424,7 448 427 448 423,5
[CME Lean Hog Futures] Suínos 111,475 111,925 111,2 111,775 111,475
[CBOT] Soja 1612 1657 1598 1657 1612,25
[CBOT] Milho 729 776,5 709,75 757,5 719
[CBOT] Óleo de Soja 69,05 71,91 70,85 70,85 68,04
[CBOT] Trigo 730 756,5 737 750 726,5
Frequência de atualização: diária