Section 8
Chapter 7,892

The effect of ringbarking brachystegia spiciformis benth. julbernardia globiflora benth. troupin and terminalia sericea burch. ex dc. trees at different heights with or without the addition of a picloram 2 4 d mixture

Teague, W.R.; Killilea, D.M.

Journal of the Grassland Society of Southern Africa 7(3): 157-165


Accession: 007891804

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Trees were ringbarked at three different heights relative to ground level (1,000 mm above the ground, at ground level and 100 mm below ground level). In a separate trial, arboricide was applied at four different rates to the lower lip of the ringbarked trees either 1000 mm above the ground or at ground level. Ringbarking without the arboricide was most effective when carried out in February and at a height of 1000 mm above the ground. Application of a picloram/2,4-D mixture to the lower lip of ringbarked trees in January or April resulted in higher kill rates than applications made in June or October. Using this method, somewhat less picloram was necessary than was required to effect the same kill rate to these trees species by applying the arboricide to cuts in their stem bases. In both trials, the kill rate was positively related to the amount of coppice removed.