
%0 Journal Article
%A Heap, I 
%A Knight, R 
%T The occurrence of herbicide cross-resistance in a population of annual ryegrass, <I>Lolium rigidum</I>, resistant to diclofop-methyl
%J Australian Journal of Agricultural Research
%D 1986/04/01
%V 37
%N 2
%P 149-156
%K 
%R https://doi.org/10.1071/AR9860149
%U https://www.publish.csiro.au/paper/AR9860149 
%X A population of L. rigidum, which is known to have developed resistance to one of the diphenyl-ethertype of herbicides, diclofop-methyl, was tested for cross-resistance to three other herbicides of the same type, namely fluazifop-butyl, oxyfluorfen and the experimental herbicide CGA 82725. The population was also tested for cross-resistance to two sulfonylurea-type herbicides - chlorsulfuron and the experimental herbicide DPX-T6376. A population susceptible to diclofop-methyl was used as the controls in the tests. The two populations were treated with various rates of the herbicides during germination and at the two-leaf stage. The results show that the diclofop-methyl-resistant biotype was cross-resistant to fluazifop-butyl, CGA 82725, chlorsulfuron and DPX-T6376 but not to oxyfluorfen. 
