2 Announcements: 1) Website Has Moved! 2) Availability of 2013 Strawberry IPM Guide (Sat, Feb. 9)

— Written By Barclay Poling

Dear Growers, Agents and Others,

I am sorry to interrupt your weekend, but I thought you might wish to know that the website where I post my advisories is moving this week (announcement 1), and the second announcement is that the SRSFC has just made available its  2013  Southeast Regional Strawberry Integrated Pest Management Guide.

At the end of this update,  I have also made reference to the “virus issue” with Nova Scotia plant material this season. You may recall seeing this Portal note from Dr. Hannah Burrack on 1/15/13.

“Growers with suspect plants (ie. those with plants for already implicated sources) should systemically treat with imidacloprid NOW before plants have flowers that will be exposed to bees–this is a label constraint. Instructions on this application method are in the SRSFC IPM Guide. Foliar treatments are not recommended as these would have to carefully timed and come at risk of pollinator impacts. The aphids we have on strawberries here are green peach aphid, potato aphid, and strawberry aphid. I have never seen black bean aphid on strawberries. All will be controlled with a systemic neonic application.”

 2 Announcements on February 9, 2013:

Announcement (1):  The Strawberry Growers Information Portal has recently been moved to: https://strawberries.ces.ncsu.edu

  • Please bookmark this new web location: https://strawberries.ces.ncsu.edu
  • All of the past advisories and subject matter content on the Strawberry Growers Information Portal was carefully transferred to the new site

Announcement (2): The 2013 Southeast Regional Strawberry Integrated Pest Management Guide (32 pages) is now available as a downloadable pdf file: http://www.smallfruits.org/SmallFruitsRegGuide/Guides/2013/StrawberryIntegratedManagementGuide_2013.pdf

  • It may be a good idea to print this document and place it in a 3-ring notebook for handy reference this season
  • The information on strawberry aphid control can be found in the new guide on p. 14. If your strawberry plugs were propagated from tips grown in Great Village, Nova Scotia (NS) last summer (2012), there is a possibility that this plant material is infected with a virus complex involving Strawberry mild edge disease (SMYED) and Strawebrry mottle virus (SMV).
  • In a January 11th memo to us from Dr. Bob Martin, Research Plant Pathologist (Virology), USDA-ARS Horticulture Crops Research Unit,  commented: ” If they (growers) have strawberry aphids, it would be a good idea to spray given all the inoculum that is present this year.”
  • At our In-Service Agent Training this week in Raleigh (Feb 7), it was was very strongly emphasized by Dr. Burrack that:
    • a) This systemic insecticide cannot be applied within 14 days of open bloom – if applied any closer than 14 days to open bloom it will be damaging to honeybee populations. Thus, it may be too late to treat with imidacloprid in southeastern NC where the open blooms that growers will be “committed to” for cropping in this milder winter region  start appearing later this month (February).  At Clayton Central Crops in Johnston County, we do not typically see our first blooms (that we are willing to frost protect) until the first week in March. However, we do not have any plants from Nova Scotia at this location, so no need to treat with imidacloprid.
    • b) This recommendation only applies to growers who know for sure that their plants were sourced from a Nova Scotia nursery – so please be sure to check with your plug supplier to see if the tips for your plugs were sourced from Balamore Farm in Great Village, Nova Scotia. In early January 2013, we (specialists with NCSU and VA-Tech ) received reports confirming the presence of both SMYED and SMV in plants from this nursery source. Our sampling in VA and NC was done in mid-December and our results were emailed by Dr. Martin on January 11th
  • In the  wrap-up portion of the Strawberry IPM Training on Thursday morning (2/7), the basic consensus  was that it may not be that critical to treat  potentially virus-infected plant material with imidacloprid at this late juncture.