Lindcove Research and Extension Center
University of California
Lindcove Research and Extension Center

Fruit Scarring by Thrips- Katydids and Earwigs in Mandarins and Oranges - field day at LREC

Date: August 21, 2019

Time: 8:30 AM - 11:00 AM

Contact: Dr. Grafton-Cardwell: 559-592-2408 ext 1152

Sponsor: Lindcove Research and Extension Center

Location: Lindcove Research and Extension Center

Event Details

Fruit Scarring by Thrips, Katydids and Earwigs in Mandarins and Oranges - Field Day at Lindcove REC

 

Wednesday, August 21, 2019

8:30 am-11 am

Lindcove Research and Extension Center

22963 Carson Ave., Exeter, CA 93221

(559) 592-2408 ext 1151. 

 

Instructors: Dr. Beth Grafton-Cardwell, Dr. Bodil Cass and Hanna Kahl

 

Course Objective: Various experiments and trials were conducted in May this year at the Lindcove Research and Extension Center.  PCAs and growers will have the opportunity to see the results of the experiments and look at the fruit scarring.  

 

8:00-8:30 am Registration: Lindcove REC

8:30-9:00 am: Dr. Beth Grafton-Cardwell, UCR and Lindcove. 2019 Citrus thrips pesticide trial results

  • The ability of PQZ, Exirel, Minecto Pro, and Delegate to minimize thrips scarring damage.

9:00-9:30 am: Dr. Bodil Cass, UC Davis. Thrips and katydid scarring in mandarins versus oranges

  • Some mandarin varieties are not readily damaged by katydids or thrips and so management may not be needed.

9:30-10:00 am: Hanna Kahl, UC Davis.  Earwig fruit damage.

  • Earwigs can damage young citrus fruit but the feeding damage varies between oranges and mandarins such as Tango and can be mistaken for katydid damage.

10:00-11:00 Rotate between stations and examine scarring damage in the various thrips, katydid and earwig experiments

  1. Pesticide trial results and thrips scarring
  2. Thrips scarring on mandarins and oranges
  3. Earwig scarring on mandarins and oranges

Continuing Education 2 ‘other’ units have been requested

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