Simulation of herbicide impacts on a plant community: comparing model predictions of the plant community model IBC-grass to empirical data

Environmental Sciences Europe

Table 4 Estimated ER50 values and slopes b for the 6 test species and the two herbicides including the standard errors (see Additional file 1: Appendix D for all dose–response curves)

Herbicide	Species	ER50	ER50 error	Slope b	Slope b error
Broad spectrum herbicide RoundUp^®	B. erectus	323.69	12.50	2.14	0.18
	C. cristatus	94.88	5.88	2.07	0.31
	G. mollugo	104.88	1.62	4.57	0.33
	L. hispidus	111.16	4.47	2.24	0.22
	S. nutans	149.93	12.09	1.46	0.18
	T. pratense	233.5	12.33	1.36	0.11
Selective herbicide Monitor^®	B. erectus	25.23	7.20	0.64	0.12
	C. cristatus	1.73	0.44	0.67	0.17
	G. mollugo	1.52	0.06	1.93	0.19
	L. hispidus	1.80	0.21	0.86	0.11
	S. nutans	1.68	0.21	0.69	0.08
	T. pratense	4.74	0^a	− 0.08	0^a

^aThe optimization routine was not able to calculate the Hessian matrix. Therefore, we were not able to calculate an error