MULTIPLE RESISTANCE OF Sagittaria montevidensis BIOTYPES TO ACETOLACTATE SYNTHASE AND PHOTOSYSTEM II INHIBITING HERBICIDES

Planta Daninha

BASTIANI, M.O.¹  MOURA, D.S.¹  Universidade Federal da Fronteira Sul, Erechim, Brazil¹  Universidade Federal de Pelotas, Pelotas, Brazil¹  Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina, Itajaí, Brazil¹  SCHREIBER, F.¹  NOLDIN, J.A.¹  GALON, L.¹ 

关键词: words: California arrowhead;    Oryza sativa;    water-seeded rice;    herbicide resistance;    chemical control;    Ricer(r);    Only(r);    Basagran(r);    Heat(r);   

DOI  :  10.1590/S0100-83582015000400016

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

The objective of this research was to evaluate the occurance of multiple resistance of Sagittaria montevidensis (SAGMO) biotypes to acetolactate synthase (ALS) and photosystem II (PSII) inhibiting herbicides through dose-response experiments. The experiment was conducted in a greenhouse from October 2012 to March 2013, in Pelotas, RS. The experimental design was completely randomized, with four replications. Treatments were arranged in a triple factorial design: two biotypes of S. montevidensis(SAGMO 35 - susceptible to herbicides and SAGMO 32 - suspected to be multiple resistance to ALS and PSII inhibiting herbicides), four herbicides (penoxsulam, (imazethapyr+imazapic), bentazon and saflufenacil) and 8 rates of these herbicides (1/32x, 1/16x, 1/8x, 1/4x, 1/2x, 0x, 1x, 2x, 4x, 8x, 16x, 32x and 64x). SAGMO 32 biotype presented high levels of resistance to penoxsulam, (imazethapyr+imazapic) and bentazon. For a 50% reduction in dry matter of the resistant biotype rate of 138 and 2.46 times higher than the label required for the susceptible biotype of the herbicides (imazethapyr+imazapic) and bentazon, respectively, are required. Saflufenacil may be used successfully to controlSagittaria montevidensis resistant in irrigated rice.

【 授权许可】

Unknown