期刊论文详细信息
Scientia Agricola
Resistance and differential susceptibility of Bidens pilosa and B. subalternans biotypes to ALS-inhibiting herbicides
Ramiro Fernando López-ovejero2  Saul Jorge Pinto De Carvalho2  Marcelo Nicolai2  Aluana Gonçalves Abreu1  Maria Tereza Grombone-guaratini1  Roberto Estevão Bragion Toledo1  Pedro Jacob Christoffoleti1 
[1] ,USP ESALQ
关键词: imidazolinone;    sulfonylurea;    hairy beggarticks;    soybean;    imidazolinona;    sulfoniluréia;    picão-preto;    soja;   
DOI  :  10.1590/S0103-90162006000200005
来源: SciELO
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【 摘 要 】

The frequent application of herbicides in agricultural areas may select resistant biotypes in weed populations, whose biological characteristics influence the speed and patterns of resistance. This research aims to charactere, simultaneously, resistance patterns and differential susceptibility of Bidens pilosa and B. subalternans biotypes to ALS-inhibiting herbicides of the imidazolinone and sulfonylurea chemical groups. Six hairy beggarticks biotypes, four suspected resistant and two known susceptible, were treated with eight rates of chlorimuron-ethyl or imazethapyr, in greenhouse conditions. Percent control and percent fresh weight of the plants were evaluated at 28 days after the application. B. subalternans is less susceptible to ALS-inhibiting herbicides than B. pilosa; B. subalternans biotypes were more resistant than B. pilosa biotypes; there are B. pilosa and B. subalternans biotypes with cross resistance to the ALS-inhibiting herbicides of the sulfonylurea and imidazolinone groups; there are different patterns of cross resistance to the diverse groups of ALS-inhibiting herbicides.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License

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