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

Rolando, Carol A.; Watt, Michael S.; Todoroki, Christine; Henley, David; Leckie, Alan

doi:10.1186/s40490-016-0076-9

New Zealand Journal of Forestry Science

Table 1 Treatments applied in the Pinus radiata trial showing active ingredients (a.i. g ha⁻¹). All herbicides were applied to the entire plot, apart from the spot applications treatments indicated in bold. All herbicides were applied with water to make up 200 L ha⁻¹. Treatments marked with an asterisk were oversown. Amount of active ingredient used for spot control was based on planting density of 1000 stems per hectare. Products used are shown below the table

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

No.	Treatment	Timing	Year applied
No.	Treatment	Timing	Year 1 (after planting)	Year 2
1	No Control	-
2	Weedfree	Ongoing	7500 g ha^{-1 a}terbuthylazine @, 1800 g ha⁻¹ hexazinone, applied as and when needed.	7500 g ha⁻¹ ^aterbuthylazine, 1800 g ha⁻¹ hexazinone applied as and when needed.
3	Operational	Oct	8000 g ha^{-1 a}terbuthylazine, 2000 g ha⁻¹ hexazinone.	^b1500 g clopyralid, 300 g ha⁻¹ ^ctriclopyr, organosilicone adjuvant applied in October.
4	Spot Control (1)	Oct	1.4 diameter spot 1200 g ha⁻¹ ^aterbuthylazine, 300 g ha⁻¹ hexazinone	No weed control
5	Spot Control (2)	Oct	1.4 diameter spot 1200 g ha⁻¹ ^aterbuthylazine, 300 g ha⁻¹ hexazinone	1500 g ha⁻¹ ^bclopyralid; 300 g ha⁻¹ ^ctriclopyr, 150 g ha⁻¹ ^dhaloxyfop, organosilicone adjuvant applied Oct.
6	CTH-Oct x2	Oct	1125 g ha⁻¹ ^bclopyralid, 225 g ha⁻¹ ^ctriclopyr, 150 g ha⁻¹, ^dhaloxyfop, organosilicone adjuvant	Repeat first year, applied Oct.
7	CTH-Oct	Oct	1125 g ha⁻¹ ^bclopyralid, 225 g ha⁻¹ ^ctriclopyr, 150 g ha⁻¹ ^dhaloxyfop, organosilicone adjuvant	No weed control.
8	CTH-Dec x2	Dec	1125 g ha⁻¹ ^bclopyralid, 225 g ha⁻¹ ^ctriclopyr, 150 g ha⁻¹ ^dhaloxyfop, organosilicone adjuvant	Repeat first year, applied Dec.
9	CTH-Dec	Dec	1125 g ha⁻¹ ^bclopyralid, 225 g ha⁻¹ ^ctriclopyr, 150 g ha⁻¹ ^dhaloxyfop, organosilicone adjuvant	No weed control.
10*	Spot Control (3)	Oct	1.4 diameter spot 175 g ha⁻¹ ^bclopyralid, 35 g ha⁻¹ ^ctriclopyr, organosilicone adjuvant	No weed control
11*	Spot Control (4)	Oct	1.4 diameter spot 175 g ha⁻¹ ^bclopyralid, 35 g ha⁻¹ ^ctriclopyr, organosilicone adjuvant	1500 g ha⁻¹ ^bclopyralid, 300 g ha⁻¹ ^ctriclopyr, organosilicone adjuvant applied Oct.
12*	Spot Control (5)	Oct	1.4 diameter spot 1200 g ha⁻¹ ^aterbuthylazine, 300 g ha⁻¹ hexazinone, organosilicone adjuvant	1500 g ha⁻¹ ^bclopyralid, 300 g ha⁻¹ ^ctriclopyr, organosilicone adjuvant applied Oct.

^aAGPRO Valzine Extra, 400 g L⁻¹ terbuthylazine and 100 g L⁻¹ hexazinone, AGPRO NZ Ltd
^bVersatill, 300 g L⁻¹ clopyralid, DOW AgroSciences NZ
^cGrazon, 600 g L⁻¹ triclopyr, DOW AgroSciences NZ
^dGallant, 100 g L⁻¹ haloxyfop P-methyl, DOW AgroSciences NZ

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