Yellow and Purple Nutsedge Management, Tarping for Farming (No-till for organic farmers) "Lights-Out" non-chemical turf grass renovation.

09/10/2025.

by Dr. Joe DeFrank

  On September 10, 2025, Dr. Joe DeFrank made a presentation to the PEPS/TPSS 481 Weed Science and discussed the management of yellow and purple nutsedge, details of tarping as a form of no-till farming method for organic farmers and concepts for non-chemical turf grass renovation.  

Topics covered in this lecture :

1. Biology of nutsedge management.

2. Methods of nutsedge management.

3. Tarping, a non-chemical means of weed control.

4. Tarping for no-till organic crop production

5. Tarping for non-chemical turf renovation.

6. On-line links: "tarping for farming", see pdfs and links in the table below.

For more information on this presentations contact:

Dr. Joe DeFrank

email:defrenk@hawaii.edu. 

Phone: 808-956-5698.

Suggested method to view streaming media and slideshow:

1.  Open two browser windows of this page, one will be used to view the "talking head" as video and the other will be used to view the slide show images as an Adobe pdf. 

2.  Click on the link to "view lecture", let the program download and start then hit pause.

3.  In the second window open the pdf version of the slide show and once the first slide appears return to lecture video and resume play.

3.  With two windows open, you can follow the lecture video for the cues to change the slide image.

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