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Retention of spray on bracken pinnae effect of application volume and formulation


Retention of spray on bracken pinnae effect of application volume and formulation



New Zealand Journal of Forestry Science 16(1): 87-95



ISSN/ISBN: 0048-0134

Higher relative spray deposits were found on pinnae of bracken fern (Pteridium esculentum (Forst. F.) Ckn) when herbicides were applied from a helicopter in lower rather than higher volumes of water. At the same application volume a formulation containing less surfactant gave higher relative deposits than surfactant-rich ones. The differences can be explained by assuming that droplets bounce when they fall on a wet surface. This hypothesis has been supported in laboratory experiments.

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Accession: 006334287

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