Viburnum Leaf Beetle

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dervish2 White Plains, CT(Zone 6b) Apr 13, 2015

I have three Viburnum Trilobum (High Bush Cranberry). Last year the leaves were badly skeletonized. I would like to prevent a recurrence this year. Does anyone know what I can use to attack the beetle?

I prefer the most organic approach. Would a soil drench of BT help at this time to reduce larvae? Would cutting back the shrubs help?

Please help

Post #10053535
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ViburnumValley Scott County, KY(Zone 5b) Apr 13, 2015

Use the abundance of resources available to you from institutions whose research you've already paid for, to wit:

http://www.hort.cornell.edu/vlb/

They even offer a way for you to participate in the broader learning opportunity about this catastrophic pest.

Here are the recommendations on VLB control:

http://www.hort.cornell.edu/vlb/newtools.html

http://www.hort.cornell.edu/vlb/manage.html

You may also benefit by directly contacting Cornell University entomology program or cooperative extension service staff.

Good luck with defeating this devil.

Post #10053638
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dervish2 White Plains, CT(Zone 6b) Apr 13, 2015

Thank you VB.

I did look at Cornell and other sites, but I also wanted some personal experiences. I am thinking of replacing these bushes with more resistant varieties. Applying a soil drench is much simpler than applying and reapplying horticultural oil.

Post #10053674
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ViburnumValley Scott County, KY(Zone 5b) Apr 13, 2015

I'm pretty sure BT will not afford any protection.

I have no personal experience, since I don't garden where VLB is prevalent. I think the approach of planting resistant species is the right one - eliminates applying pesticides almost entirely.

Post #10053678
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