Herbicide options for managing competitive vegetation during the establishment of Pinus radiata and Pseudotsuga menziesii var. menziesii in Southland, New Zealand

New Zealand Journal of Forestry Science

Table 4 Treatment means (and standard errors) for groundline diameter (gld), total tree height (ht), and stand volume (SV; determined as average tree volume scaled to a hectare) at 2.5 years

No	Treatment	Pinus radiata			Pseudotsuga menziesii
		gld	ht	SV	gld	ht	SV
		(mm)	(m)	(m³ ha⁻¹)	(mm)	(m)	(m³ ha⁻¹)
1	No control	43 (3)	2.8 (0.1)	3.0 (0.5) d	19 (1)	1.4 (0.1)	0.3 (0.1) a
2	Weed-free control	69 (3)	2.5 (0.1)	5.6 (0.6) abc	33 (3)	1.4 (0.1)	1.1 (0.2) a
3	Operational	66 (2)	2.8 (0.1)	5.4 (0.5) ab	31 (2)	1.5 (0.1)	0.9 (0.2) a
4	Spot control 1	51 (2)	2.8 (0.1)	3.4 (0.3) abcd	22 (1)	1.6 (0.1)	0.5 (0.1) a
5	Spot control 2	61 (2)	3.0 (0.1)	4.9 (0.3) abc	27 (2)	1.6 (0.1)	0.6 (0.1) a
6	CTH-Oct x2	69 (3)	2.7 (0.1)	6.0 (0.5) a	29 (2)	1.4 (0.1)	0.8 (0.1) a
7	CTH-Oct	53 (3)	2.5 (0.1)	3.6 (0.4) cd	25 (2)	1.6 (0.1)	0.5 (0.1) a
8	CTH-Dec x2	54 (3)	2.6 (0.1)	3.7 (0.4) abcd	24 (2)	1.6 (0.1)	0.6 (0.1) a
9	CTH-Dec	50 (2)	2.8 (0.1)	3.3 (0.4) bcd	30 (2)	1.7 (0.1)	0.8 (0.1) a
10	Spot control 3*	33 (2)	2.3 (0.1)	1.3 (0.2) e
11	Spot control 4*	36 (2)	1.9 (0.1)	1.3 (0.2) e
12	Spot control 5*	58 (2)	3.0 (0.1)	4.6 (0.4) abc
10	Winter glyphosate				29 (2)	1.7 (0.1)	0.7 (0.1) a
11	CTH-Oct + winter glyphosate				28 (2)	1.4 (0.1)	0.6 (0.1) a
12	Spot control 3*				22 (1)	1.4 (0.1)	0.4 (0.0) a

Treatments with the same letters are not significantly different (refer to the Appendix for regression details)
Treatments with oversowing are marked with an asterisk