Niet te geloven, een middel tegen JKK. Het verschijnt in een advertentie op PN. En het bestaat voor ruim 22% uit citronella-olie. Zou dat waar zijn? Lijkt me toch twijfelachtig.
Heeft iemand ervaring met dit middel? Of is er onderzoek mee gedaan?

Moniek

marielle schreef op woensdag 31 mei 2006, 16:10:


Het duurt best wel even voordat je paard in de schaduw van een zaadje kan staan hoor.... Ik weet niet wanneer je die schuilplaats klaar wilt hebben...

Moniek schreef op woensdag 31 mei 2006, 17:32:


Citronella oil
Citronella oil, a naturally-occurring plant extract and
marketed in the UK as Barrier H, offers a potentially valuable
alternative herbicide for the control of common ragwort in
grassland situations. Barrier H is sold as a ready-to-use
spray, in a five-litre container with an applicator gun. Current
PSD approval permits only spot-treatments through hand-held
applicators, reducing potential damage to non-target species.
As with other herbicides, any treated dying or dead ragwort
may continue to be poisonous to livestock. Barrier Biotech
recommends that grazing animals are removed prior to
treatment and excluded from treated areas for two weeks
or until the dead ragwort has completely disappeared.
The manufacturers of Barrier H claim that it is effective
against ragwort at any stage of growth and any time of year.
They state that sprays onto flowerheads will prevent seeding
immediately, greatly reducing problems in the following year.
They also claim that ragwort at the rosette stage, if sprayed
during the winter months, will die within 24-48 hours. Large
plants may take from seven to ten days to be completely
killed. Roots are also killed, reducing the likelihood of
re-sprouting.
Although initial observations support much of the
manufacturer’s claims about efficacy against ragwort
(English Nature 2001), there is very little research evidence
to either support or contradict them. Similarly, there is very
little information about the effects of citronella oil on animal
species or non-target plants. Observations suggest that
other ‘green’ vegetation, including grass blades, suffer leaf
scorch and react in the same way as ragwort leaves, so very
careful targetting of the herbicide to ragwort is indicated.
Citronella oil is more commonly used as an insect repellent
and, although Barrier Biotech claim that it quickly loses its
insect repellent characteristics when exposed to sunlight,
English Nature currently recommend caution in its use on
SSSIs during the flight period of invertebrates for which the
site is notified (English Nature 2001).

Dit is het enige wat ik heb kunen vinden aan waarnemingen.

Esther