Weather has been great for the past week with lots of heat and humidity. Crop stress was eased over the weekend by rain and slightly cooler temps. This did not stop the Japanese Beetle from establishing a presence all around the state. Keep an eye out for this invasive species as well as other weeds like giant hogweed and wild parsnip which Mark Renz, this week’s guest, will go over.
County Reports (00:10)
Specialists Reports (13:45)
Special Guest: (17:50) Mark Renz – UW-Extension Weed Specialist and UW-Madison Associate Professor
Next Friday August 5th there will be a partnered event with Mark Renz on invasive plant monitoring workshop in Winnebago county just look online and register. It is free to attend if you would like to go.
Download the link 2016/07/29 10:35:06, or listen to it in the pop out box by clicking play.
- For PC’s, right click on “Download”, select “Save Link As. . .” and choose a location on your computer to save the file.
- For Mac’s, Ctrl+click on “Download”, select “Save Link As. . .” and choose a location on your computer to save the file.
- Follow along with Mark Renz’s presentation: Proper Timing and Use of Companion Crops when Establishing Turf for Urban Situations.
- Here are links to several sources:
- Traits that Mark uses to differentiate from cow parsnip include
- diameter of the stems(> 2 inches wide is hogweed),
- height of the plants when flowering (10-15 ft tall hogweed)
- the whole leaf (> 1 ft wide hogweed).
- Timing of flowering, Cow parsnip starts flowing in early to mid June,
while hogweed doesn’t start until the end of June – July.
- Others have used red spots on the stem as a trait. I haven’t used this so
can’t comment on its accuracy.
- For control any of the growth regulator herbicides (2,4-D, banvel/clarity,
triclopyr (e.g. garlon)) should work well if treating before they get too
- Next Friday August 5th there will be a partnered event with Mark Renz on invasive plant monitoring workshop in Winnebago county just look online and register. It is free to attend if you would like to go.