[APWG] early-flowering stiltgrass
ForestRuss at aol.com
ForestRuss at aol.com
Thu Aug 16 20:13:11 CDT 2012
Angie and others:
This week we began our annual treatment of stiltgrass and yesterday, August
15, I found stiltgrass in seed.
A week ago I saw some plants that were almost ready to go to seed but I
blew off the thought of what was actually going on because I figured it was at
least three weeks earlier than usual.
Russ Richardson, Forester
Arnoldsburg, WV
In a message dated 8/16/2012 12:35:11 P.M. Eastern Daylight Time,
anshelto at indiana.edu writes:
Hello all,
I have noticed that Japanese stilt grass in south central Indiana started
setting seed by the first week of August this year. Seed set in this area
usually begins in late August to early September. This year's seed set is
almost a full month earlier than usual. Control efforts on this annual
plant need to be done before seed set to be effective, so an earlier flowering
time reduces the time for late-season management.
The earlier flowering could be a result of a warm, early spring that
caused stiltgrass and most native spring plants to germinate 3-4 weeks earlier
than usual. It could also be due to a much warmer than usual summer. These
causes are not mutually exclusive.
I am curious if Japanese stiltgrass is also flowering earlier than usual
in other regions. If so, was germination also earlier than usual? Summer
temperatures were probably warmer than usual across the entire range in the
eastern U.S. What are the typical germination and flowering times in more
southern regions where the growing season is longer? Being able to predict
flowering time across a range of conditions is important to know when the
deadline is to complete management efforts for the year.
Angie Shelton
Department of Biology
IU Research & Teaching Preserve
Indiana University
Bloomington, IN 47405
812-855-1674
_anshelto at indiana.edu_ (mailto:anshelto at indiana.edu)
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