Any ideas what these things are eating my hops? - Home Brew Forums
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Old 07-05-2012, 10:36 PM   #1
Canadabrew
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They seem to eat a leaf pretty quickly. So far I've just been taking them off when I say them.
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Old 07-05-2012, 11:30 PM   #2
runningweird
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try a product called BT - its not harmful to people its a bacterial insecticide that gets rid of pretty much everything. I think those are question mark caterpillars, Polygonia interrogationis,

http://bugguide.net/node/view/397853/bgimage
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Old 07-05-2012, 11:49 PM   #3
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Looks like butterfly larvae. Not sure what kind tho. Could be moth too. Painted Lady larvae look very similar to that.
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Old 07-05-2012, 11:54 PM   #4
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where are you by the way? getting your geographical location will help narrow down the list of suspects
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Old 07-06-2012, 12:04 AM   #5
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Just north of Toronto.

 
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Old 07-06-2012, 12:34 AM   #6
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Quote:
Originally Posted by runningweird
try a product called BT - its not harmful to people its a bacterial insecticide that gets rid of pretty much everything. I think those are question mark caterpillars, Polygonia interrogationis,

http://bugguide.net/node/view/397853/bgimage
Bt won't get rid of everything, but it will get rid of the caterpillars and other "worms" or larvae of many species. It will work on those pictured above.

If you have other pests as well (like aphids), a more broad spectrum insecticide may be needed for control of them all. I use Bonide garden dust or Bonide BT Thuricide, depending on needs.
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Old 07-06-2012, 12:35 AM   #7
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I win.
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Old 07-06-2012, 01:09 AM   #8
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also remember, anything you put on your hops will eventually get into your beer and into you - even if it is in small doses. Consider carefully what kind of chemical insecticides you want to be ingesting from your beer.
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Old 07-06-2012, 01:37 AM   #9
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Right which is why up until now I just squash them and check my hops daily.

 
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Old 07-06-2012, 01:53 AM   #10
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I think it's a crescent butterfly caterpillar; there were some on my hops too. I squished about 6 or 7 and haven't seen them since.
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