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CLB Survey

Biological Control Program for Cereal Leaf Beetle in Oregon, 2006 Barry B. Bai 1 , Richard A. Worth 1, Kathleen J. R. Johnson 1 , and Gary Brown 2 1. Oregon Department of Agriculture, 635 Capitol St. NE, Salem, OR 97301 2. USDA, APHIS-PPQ, 6135 NE 80th Ave. #A-5, Portland, OR 97218. CLB Survey.

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CLB Survey

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  1. Biological Control Program for Cereal Leaf Beetle in Oregon, 2006Barry B. Bai1, Richard A. Worth1,Kathleen J. R. Johnson1,and Gary Brown21. Oregon Department of Agriculture, 635 Capitol St. NE, Salem, OR 973012. USDA, APHIS-PPQ, 6135 NE 80th Ave. #A-5, Portland, OR 97218

  2. CLB Survey No new counties were found positive in 2006

  3. Summary of Oregon’s Anaphes Cooperative Project with the CDA Palisade Lab *Assumes an average of 2 A. flavipes per CLB egg

  4. Eggs were also collected from seven other fields in the Banks vicinity and from the new release fields in Scio, Linn Co. All samples were negative.

  5. Donavon Hampton at the spring barley release field in Scio

  6. A student doing “career day” with entomologist sweeping for CLB adults near Island City in Union Co.

  7. Biocontrol Highlights - A. flavipes • First time release in a grower’s field in Scio, Linn County; all five releases this year were at this location. • Overwintering recovery in the Scholls Insectary peaked at 5% parasitism; recovery in the Banks Insectary dropped from ~30% in 2005 to zero in 2006. • No activity in Union County due to very low CLB populations.

  8. Highest rate of T. julis parasitism in each county where recovered Sites were sampled in Willamette Valley counties not sampled in past years. Note the two Washington Co. sites are the Anaphes insectaries.

  9. Estimated numbers of parasitized CLB larvae and T. julis released for each listed county *Assumes an average of 5 T. julis per CLB larva

  10. Biocontrol Highlights - T. julis • T. julis has spread well on its own, esp. in Willamette Valley; high rates of recovery (>80%) in most fields sampled. • First T. julis release at the Madras Insectary in central Oregon and at other sites in Jefferson Co.; T. julis already recovered at 2%, likely spread from a Crook Co. release in 2002. • First release of T. julis in Umatilla Co.

  11. Cost and Acres Sprayed for CLB in Oregon No numbers available yet for 2006

  12. T.julis population changes Sample date

  13. Summary • No. of counties infested by CLB in OR (19) remains the same as in 2003, 2004, and 2005. • Adults decreased in numbers and had a shorter season compared with previous years, making collecting and redistribution more difficult. • Shortened adult period resulted in a shortened egg period. Anaphes flavipes parasitism rates were very low at 5%, a decrease from 2004 and 2005. • Tetrastichus julis achieved high parasitism rates in most places sampled in Oregon. T. julis redistribution focused in central Oregon. • Future plans: continue monitoring Anaphes flavipes insectaries and release areas. Release both Anaphes and T.julis in central Oregon.

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