What was (2005) and What's up now (2022) - Problem grassy weed control in Hawaiian Turf.

  Dr. Joe DeFrank provided a Zoom webinar on May 11, 2022 to turf managers in Hawaii.  Participants were able to earn credits for their Hawaii DOA restricted use pesticide license and GCSAA and LICH professional membership certifications.  Dr. DeFrank provided a historical review of grassy weed control research and practice from 2005 to 2022.  

Topics covered in the presentation include:

• Identification of problem grassy weeds in Hawaii

• History of "The Hawaiian Punch" for goose grass control in Hawaii during the period of 1980's to 2022.

• Perennial grassy weed control in Hawaii

• Weed wipers for topical herbicide application

Video of the webinar and a pdf file of the slides used are presented in the table below.

For more information on this presentations contact:

Dr. Joe DeFrank

email:defrenk@hawaii.edu.  .

IMPORTANT ADDENDUM TO DR. DEFRANKS WEBINAR POSTED ON 05/13/2022

  The reason for this addendum, see link below, is the need for clarification for the use of "spot treatments" to apply a tank mix of Sencor®/Tricor® with Drexel's MSMA+® herbicide formulations.  The text of the stakeholder's email is provided below to provide the basis for posting this addendum to the webinar presentation made on 05/11/2022 and post above on 05/13/2022.

Text of email (dated: 06/06/2022) that prompted this addendum:

I was just going over your most recent webinar on weeds and the one thing I noticed that you were covering rates of spot treatment with sencor your example was“To prepare the S/T+MSMA tank mix: add 2.6 grams S/T to 1 gallon and spot treat 1,000 ft 2”  According to the label you are only allowed to boom Sencor not spot spray with it because there is no rate on the label for spot spraying. The label, under restrictions and precautions it states “Low pressure and high volume hand wand equipment is prohibited”   Has this changed?

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