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- Title
Fluazifop-butyl activity on Imperata cylindrica (L.) P. Beauv. I. Studies on phytotoxicity, spray adhesion and herbicide uptake.
- Authors
Mabb, L. P.; Price, C. E.
- Abstract
Fluazifop-butyl was sprayed onto established plants of <em>Imperata cylindrica</em> (L.) P. Beauv. and <em>Paspalum conjugatum</em> Berg. growing rapidly under warm glasshouse conditions. Visually I. cylindrica was considerably more resistant to phytotoxicity than P. <em>conjugatum</em>, for both contact damage to the sprayed shoots and regrowth from the rhizome or stolon. Although not statistically significant, there was a trend for <em>I. cylindrica</em> to retain more spray than <em>P. conjugatum</em>. Drops applied to upper and lower surfaces of <em>I. cylindrica</em> spread similarly, but on leaves of <em>P. conjugatum</em> spread was less on upper and greater on lower leaf surfaces. There were no differences in uptake from drops placed on the upper surface. Preliminary translocation studies suggested greater movement out of treated leaves of <em>P. conjugatum</em> than from the treated leaves of <em>I. cylindrica</em>. On the basis of these data, differences between the two species did not directly relate to the retention of spray or the uptake of the active ingredient into the leaf, but translocation differences were important. In addition, the relative resistance of <em>I. cylindrica</em> to fluazifop-butyl may also be caused in part by having a lower ratio of aerial shoot dry weight to total and subterranean dry weight than <em>P. conjugatum</em>. This results in less herbicide retained per unit mass of plant tissue in the former.
- Subjects
COGON grass; IMPERATA; PASPALUM; GREENHOUSE plants; PHYTOTOXINS; EFFECT of light on plants; HERBICIDES
- Publication
Weed Research, 1986, Vol 26, Issue 5, p301
- ISSN
0043-1737
- Publication type
Article
- DOI
10.1111/j.1365-3180.1986.tb00711.x