Citrus Research & Technology
https://citrusrt.ccsm.br/article/doi/10.4322/crt.ICC129
Citrus Research & Technology
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Comparison of three herbicides and combinations for weed management in citrus  

Comparação de três herbicidas e combinações para manejo de plantas daninhas em citros 

Ben Faber, Travis Bean, Oleg Daugovish, Jose De Soto & Anna Howell

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Abstract

At a clay loam site near Santa Paula, California, was examined the weed control efficacy of two products with the active ingredient indaziflam, applied at two rates (Alion 200 SC at 365 ml ha-1 and Alion 500 SC at 146 ml ha-1). These were applied alone and in combination with rimsulfuron (Matrix) at 146 ml ha-1, which was also applied alone at 292 ml ha-1, for a total of five herbicide treatments plus an untreated control for fall and spring application timings (November 2015 and February 2016, respectively). Treatments were applied to clean row middles that had been previously treated with glyphosate and shallow cultivation. Weed control was evaluated at two, four, and six months after treatment. The most common weeds in the plots were species of Malva, Conyza, Convolvulus, Euphorbia and Chenopodium. For all species combined, both indaziflam products plus rimsulfuron, Alion 200 SC alone, and Matrix alone had lower weed densities than untreated control regardless of time since treatment.

Keywords

indaziflam, rimsulfuron, pre-emergence, post-emergence.

Resumo

Em uma localidade com solo argiloso próxima de Santa Paula, Califórnia, foi examinada a eficácia de controle de plantas daninhas de dois herbicidas com o ingrediente ativo indaziflam, aplicado em duas doses (Alion 200 SC a 365 ml ha-1 e Alion 500 SC a 146 ml ha-1). Estes foram aplicados sozinhos e em combinação com rimsulfuron (Matrix) a 146 ml ha-1, que também foi aplicado sozinho em 292 ml ha-1, para um total de cinco tratamentos com herbicidas, além da testemunha (sem herbicida), com aplicações no outono e primavera (novembro 2015 e fevereiro de 2016, respectivamente). Os tratamentos foram aplicados para controlar toda a entrelinha do pomar que foi previamente tratada com glyphosate e cultivo superficial. Foi avaliado o controle de plantas daninhas aos dois, quatro e seis meses após o tratamento. As plantas daninhas mais comuns nas parcelas foram as espécies de Malva, Conyza, Convolvulus, Euforia e Chenopodium. Para todas as espécies, ambos os herbicidas com indaziflam mais rimsulfuron, Alion 200 SC e Matrix aplicados isoladamente apresentaram menor densidade de plantas daninhas do que a testemunha, independente do tempo após o tratamento.

Palavras-chave

indaziflam, rimsulfuron, pré-emergência, pós-emergência
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