Red rice (Oryza sativa) Control in Rice (O. sativa) with Preemergence and Postemergence Herbicides¹

Abstract

Field experiments were conducted in Greece during 1997, 1998, and 1999 to study the efficacy of various preemergence and postemergence herbicides against red rice. Tolerance of rice seeded 15 and 6 d after preemergence and postemergence herbicide application was also examined. Control of red rice with alachlor, dimethenamid, metolachlor, or acetochlor applied preemergence was 92, 84, 92, and 92%, respectively. The corresponding control with postemergence applications of paraquat, glyphosate, glufosinate, or quizalofop-ethyl to emerged red rice seedlings was 92, 89, 81, and 100%, respectively. None of the herbicides had any phytotoxic effect on rice cultivars planted after the herbicide application, and grain yield produced in treated plots was higher than that in untreated plots. These results clearly showed that red rice can be effectively controlled by applying the previously mentioned preemergence or postemergence herbicides and that rice could be safely seeded 15 and 6 d after treatment, respectively.

Cross-Resistance to Imazapic and Imazapyr in a Weedy Rice (Oryza sativa) Biotype Found in Malaysia

“…On the other hand, oxadiazon exhibited excellent control of R-WR (Table 4). This herbicide can be used to manage R-WR, but needs to be applied at least 15 days before rice sowing (Eleftherohorinos and Dhima, 2002). Clearfield ® rice cultivars are still the mainstay in Malaysian rice production (Dilipkumar et al, 2017).…”

“…In Malaysia, the pre-emergence herbicide, pretilachlor has been commonly applied immediately after tillage, followed by allowing irrigation water to stand in the field for 7 to 10 days before broadcasting pre-germinated rice seeds (Dilipkumar et al, 2012). Other pre-emergence herbicides including oxadiazon and s-metolachlor are effective on weedy rice, but these herbicides must be applied at least 15 days before rice sowing to avoid any phytotoxic effects (Eleftherohorinos and Dhima, 2002).…”

Efeito de deriva simulada de herbicida inibidor de ALS nos componentes da produtividade do arroz irrigado

“…O controle de plantas daninhas deve se basear em práticas de manejo integrado, no entanto, em razão das similaridades botânicas entre arroz cultivado e arroz-vermelho, o controle pelo método químico com herbicidas seletivos torna-se impraticável (Eleftherohorinos & Dhima, 2002).…”

Suscetibilidade de cultivares de arroz irrigado (Oryza sativa) à deriva simulada do herbicida imazethapyr + imazapic

“…O arroz-vermelho (Oryza sativa) é uma das mais importantes plantas daninhas em áreas produtoras de arroz do mundo (Eleftherohorinos & Dhima, 2002). A sua presença em lavoura comercial, além de reduzir a produtividade, diminui o custo de produção, decorrente do acréscimo de práticas adicionais de controle (Noldin et al, 2004).…”

“…O controle do arroz-vermelho em lavouras infestadas deve ser feito com a utilização de um conjunto integrado de práticas, que incluem o uso de sementes puras, sistema de semeadura com sementes pré-germinadas, transplantio, preparo do solo na entressafra, adoção do sistema de cultivo mínimo (Noldin et al, 2004), práticas de rotação de culturas e controle químico (Ferrero et al, 1999). No entanto, o método químico com herbicidas seletivos torna-se inviável devido às similaridades botâ-nicas entre o arroz cultivado e o arroz-vermelho (Eleftherohorinos & Dhima, 2002). A mais recente tecnologia para controle seletivo de arroz-vermelho foi o desenvolvimento de cultivares tolerantes a herbicidas do grupo das imidazolinonas (Ottis et al, 2003).…”