Mistblower Application of Chemicals to Control Bush in Rangeland

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Ivens G. W.
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A series of experiments is described in which herbicides have been tested by low volume mistblower application on a number of rangeland bush species. Good control of Aspilia mossambicensis and Lippia javanica was obtained with 2,4-D ester and of Tarchonanthus camphoratus with picloram + 2,4-D amines. On Acacia drepanolobium mistblower application of pic10ram + 2,4-D gave similar results to those given by high volume spraying, and on bush dominated by Commiphora spp. mixtures of 2,4,5-T +2,4-D and picloram + 2,4-D produced effects of the same order. There is evidence with A.drepanolobium that treatment is only likely to be successful during the latter part of the long rains, while Tarchunanthus is susceptible for a longer period extending into the subsequent dry season. With the other species successful results have been obtained at a time of active growth. Estimates are given for the cost of mist blower treatment, and the practicability of such treatment in rangeland is assessed.
East African Agricultural And Forestry Journal, 37, p. 171-176