Table 2.

Estimated model parameters (see Eq. 2). The ED_10, ED_50, and ED₉₀ values are the effective doses resulting in a 10, 50, or 90 per cent biomass reduction.

Run	Leaf stage	Parameter	One node, one shoot		Two nodes, one shoot		Two nodes, two shoots
			Value	SE	Value	SE	Value	SE
1	1-leaf	b	5.0	2.6	− 0.08	0.51	− 3 × 10–2	5 × 10–2
		d	0.34	0.05	0.69	10.2	1.11	10
		e (ED50)	1.11	0.22	1 × 1039	10	4.2	10
		ED10	0.72	0.24	6 × 1026	1 × 1029	6 × 10–54	2 × 1057
		ED90	1.72	0.47	4 × 1051	7 × 1053	3 × 10–03	Infa
1	2-leaf	b	6.8	4.6	11.8	15.6	10.8	31.8
		d	0.68	0.08	1.020	0.04	2.7	0.17
		e (ED50)	1.0	0.17	0.93	0.24	0.85	0.30
		ED10	0.7	0.1	0.77	0.05	0.70	0.18
		ED90	1.36	0.48	1.12	0.56	1.0	1.0
1	3-leaf	b	− 0.08	0.23	3.42	1.23	0.46	0.67
		d	1.2	10	1.79	0.17	0.87	0.10
		e (ED50)	6 × 1030	10	2.65	0.72	0.01	0.07
		ED10	5 × 1019	3 × 1021	1.40	0.53	7 × 10–5	0.001
		ED90	8 × 1041	5 × 1043	2.65	0.72	1.1	2
2	1-leaf	b	5.0	2.7	-0.08	0.51	2.8	3.2
		d	0.34	0.05	0.69	10.2	0.6	0.07
		e (ED50)	1.11	0.22	1.5 × 1039	10	0.57	0.25
		ED10	0.71	0.24	5.6 × 1026	1 × 1029	0.26	0.04
		ED90	1.72	0.47	3.9 × 1051	7 × 1053	1.2	0.7
2	2-leaf	b	6.81	4.64	0.35	0.16	10.8	31.8
		d	0.68	0.07	0.66	0.09	2.7	0.2
		e (ED50)	0.99	0.17	0.002	0.004	0.86	0.3
		ED10	0.7	0.12	3 × 10–6	1 × 10–5	0.7	0.18
		ED90	1.36	0.35	0.84	1.76	1.1	1.0
2	3-leaf	b	− 0.08	− 0.02	17.8	40.0	0.46	0.67
		d	1.2	10	0.52	0.08	0.88	0.12
		e (ED50)	6 × 1030	10	1.18	0.85	0.01	0.07
		ED10	5 × 1019	3 × 1021	1.04	0.85	7 × 10–5	1 × 10–03
		ED90	9 × 1041	5 × 1043	1.18	0.85	1.1	2.0

^aInf = infinity.

SE = Standard Error.