Peter,
We've been trapping for Dogwood borer for years to try to gather
data on our infestations beyond the field scouting to help drive our
treatments. Penn State did some research on our farm using DWB
pheromones a few years ago. Now, there is a new Isomate product for
DWB. We implemented a farm wide mating disruption program for DWB in 2013.
My trap captures (using the new ShinEtsu lures) went to zero the
first week after the pheromone ties were put out. (Pre-MD, our counts
at peak flight often exceeded 50-100 per trap per week in some
locations.) Based on our experience with other MD for CM & OFM, we
anticipate populations of DWB to drop dramatically within the next three
years. Our trunk treatments were only moderately effective in
controlling DWB in the past. The new DWB mating disruption program
offers me some hope that we might gain an advantage over this pest,
especially since we have so many new high density plantings started on
our farm.
MD doesn't necessarily eliminate the threat and some pesticide
treatments may be warranted during year one of an area-wide MD program.
However, it may offer a clear alternative to using chlorpyrifos if a
softer control method is the goal.
-Brad
Brad M. Hollabaugh
General Manager
Hollabaugh Bros., Inc.
Biglerville, PA
hollabaughbros.com
On 2/6/2014 1:01 PM, Peter Werts wrote:
Hi All,
I have a grower who has had an ongoing issues with dogwood borer and
would like to identify an alternative to chlorpyrifos. Does anyone
have experience using Assail (acetamiprid) as a trunk drench to manage
dogwood borer infestations in burr knots on Mark rootstocks? How
effective have those treatments been? Assail 30 SG is labeled for a
trunk drench. Mounding soil over the burr knots is not economically
viable considering the acreage. Chlorpyrifos can be used up to
28-days before harvest for dogwood borer and would like to see that
only as an option if we can't identify lower-risk alternatives.
Thoughts on this?
Thanks,
Peter
=============================
Peter Werts
Project Coordinator
Specialty Crop IPM
IPM Institute of North America, Inc.
4510 Regent St.
Madison WI 53705
Office: 608 232-1410
Cell: 612 518-0319
Fax: 608 232-1440
[email protected] <mailto:[email protected]>
www.ipminstitute.org <http://www.ipminstitute.org/>
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