Proceedings of the Sixty-first Annual Meeting of the Northeastern ...

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ORNAMENTAL WORKSHOP 2007. J. Altland, Moderator, Oregon State Univ., North
Willamette Research and Education Center, Aurora.
ABSTRACT
A workshop format will be used in discussing the topic of “Research Methods for
Weed Management in Container Crops”. Participants have been in invited to introduce
and help lead a discussion on three areas of interest by researchers working in weed
control in ornamentals. Following the introduction by the group moderator all workshop
participants will have an opportunity to provide ideas and examples of their methods
used when conducting trials. The workshop is for the benefit of participants and it is
planned that a “Notes on Research Methodologies in Ornamental Weed Science’ will
be summarized and distributed to all that attend.
Topics to be discussed – come prepared to share resources and ideas:
1. Methods for collecting, cleaning, drying and storing weed seed. Handling
those hard to find seeds. Conducting bioassays.
2. How do you inoculate or “seed” pots with weeds? What methods have worked
better? Should pots have both weed population and ornamental plant placed
for evaluation in the same pot? What types of statistical designs are used?
Maintaining weed populations for the length of study. What are the best
methods to evaluate residual control from a preemergmence application?
3. What evaluations are best used for weed control and for plant safety? What
parameters are best used to examine plant tolerance; what observations best
describe the plant phytotoxicity that is identified? What size plant do you use
and when do you make your application; directly after transplanting, etc?
Does requiring multiple applications add to information on plant safety? How
does working with trees or field-grown plants change your application
methods, age of plant or other parameters in plant safety trials?
Discussions may use specific weed species like creeping woodsorrel or liverwort or
other emerging nursery weed problems as examples in the discussions. Also, in the
discussions on looking at plant tolerance examples of plants that are recognized as
more “chemical sensitive” vs. those species where plant injury is seldom seen may be
used as examples in the discussions. Each topic will have at least 3 participants who
have come prepared to share their information on that topic. Two industry spokespeople
will share briefly their viewpoint on executing ornamental research trials and company
expectations from the data generated. However, participation from the audience is
being encouraged for all topics.
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