robert wrote:
.. As indicated I have
tried glyphosate to control Ransoms but with only limited success -

Not surprising. If glyphosate has a weakness, it is with bulbs. I have
found that it doesn't always kill bulbs, but the new leaves which appear the
next year are often somewhat chlorotic and the plant is much weaker. If
healthy leaves eventually appear, it usually means that the plant has
survived. Another spraying or two will then be required.

--
Jeff
(cut "thetape" to reply)