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11-May-2008
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#1 |
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bonsaiTALK Journeyman
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Mugo problems...
Ok, after digging the mugo last week, I have some needle drop. Not unexpected. But today I found white scale-like stuff and caterpillars.
Time to spray? What's the white stuff? Looks like some sort of scale. Help? Scott Last edited by bliorg : 11-May-2008 at 11:49 AM. |
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Mugo problems... |
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11-May-2008
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#2 |
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bonsaiTALK Journeyman
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There ya go. Google's my friend - the caterpillars are European Pine Sawfly larvae...
Time to get out the diazinon... |
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12-May-2008
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#3 |
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bonsaiTALK Artisan
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Nice to know, I have acquired 2 Mugo's so far and will keep an eye out for these little bastards!
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12-May-2008
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#4 |
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bonsaiTALK Master Craftsman
Join Date: Jan-2005
Location: SE Massachusetts
Country: USA
USDA Zone: 6
AHS Heat Zone: 4-5
Posts: 588
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Those caterpillars are sawfly larvae, and you also have the dreaded pine scale, a super pain in the butt when it comes to pines in general, and Mugos in particular. Please do a search on these to pests so you will understand them well. They will likely be intermittent problems for you. Generally, I come from the camp of using the least toxic remedy avaiable to do the trick. Manually removing the sawfly larvae works form me. As far as the scale goes, I have only had luck with systemics, and even that is debatable. Good luck,
Dave |
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12-May-2008
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#5 |
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bonsaiTALK Journeyman
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Thanks, Dave. Good info to know. I have to prune this mugo back; I'm going to see if I can't prune away most of the scale. The sawfly larvae are gone already...
 Scott |
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12-May-2008
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#6 |
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bonsaiTALK Master Craftsman
Join Date: Jan-2005
Location: SE Massachusetts
Country: USA
USDA Zone: 6
AHS Heat Zone: 4-5
Posts: 588
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Don't prune away growth just because it has scale on it...they may be alive (these will squish when squashed), or they may be dead, in which case you will have an empty white casing which doesn't squish. Obviously, removing the empty shell isn't going to benefit your tree, which has already been shocked by transplanting and needs foliage to help repair its root system. After pruning, I'd still consider a systemic insecticide to be used judiciously.
Dave |
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12-May-2008
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#7 | |
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bonsaiTALK ArchMaster
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Quote:
The saw fly larva can be picked off manually, the best way especially with a freshly dug tree. The scale can be taken care of manually with a tooth brush and some denatured alcohol, lightly scrub the infected area with the tooth brush soaked in alcohol going in the direction of growth. Do this till you dislodge the scale. Spraying with something as potent as diazanon could kill the tree in its current state. Do everything by hand or lose the tree. Still, there are no guarantees, Mugos do not transplant well in the early spring.
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The only finished bonsai is a dead one; me 1992 MABA Des Moines Iowa |
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