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Controlled release pesticides. Part 8. Growth enhancement of a juvenile conifer forest four years after application of a controlled release herbicide


, : Controlled release pesticides. Part 8. Growth enhancement of a juvenile conifer forest four years after application of a controlled release herbicide. International Pest Control 17(2): 4-9

The 4-year performance of a controlled release formulation of 2,4-DB in promoting the growth of a young plantation of Douglas fir (Pseudotsuga menziesii) is described and assessed, (see also WA 22, 3056). The lowest rate used (200 g of a formulation containing 37% 2,4-DB applied to an area of 25 ft2 round the trees) sufficed to suppress vegetation for >1 year on good quality sites and the treated conifers grew about 20% faster than the untreated controls.

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