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Ester formulation and surfactant affect response of radiata pine pinus radiata and gorse ulex europaeus seedlings to 2 4 5 t

Ester formulation and surfactant affect response of radiata pine pinus radiata and gorse ulex europaeus seedlings to 2 4 5 t

New Zealand Journal of Forestry Science 9(1): 44-52

In a replicated 2 (ester) .times. 4 (rate) .times. 2 (surfactant) factorial experiment, the iso-octyl ester of 2,4,5-T was more effective in controlling seedling gorse (U. europaeus L.) and less damaging to radiata pine (P. radiata D. Don) seedlings than the butyl ester. The addition of 0.5% vol/vol surfactant significantly enhanced the activity of the iso-octyl ester against the gorse, but not that of the butyl ester, and resulted in marginally less tree growth suppression by 2,4,5-T. Further investigation of the effects of ester formulation and surfactant on 2,4,5-T activity in relation to gorse control and tree selectivity appears warranted.

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