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| Euonymus scale...
One was infected last year, now I noticed another in my yard is infected (or the remnants of last years infestation). The existing white scale rubs off and turns powdery, so I think it's last year's problem since these are empty carcasses or so to speak. So, I treated with an annual systemic and that should do the trick to prevent another infestation this year? I also used an organic insecticidal soap just to be sure, but that may have been overkill. ? (I use Bayer tree systemic) Just to make sure I understand -- ALL scale dies off in the winter months, in my region, zone 5 WI? Should this suffice? |
Follow-Up Postings:
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- Posted by ken_adrian z5 (My Page) on Wed, May 4, 11 at 9:06
| kim.. are those plants so special.. that you need to use chemicals???? you would be so much better off just getting rid of them ... please think long and hard about that ... yes.. the bigger mom's.. die.. and remain over winter.. hiding eggs .. in spring.. the crawlers hatch.. and wiggle out ... timing an application of oil or soap .. would require they actually be out from under mom.. but not yet having developed their own hard cover ... the few times i have had scale in pines.. one single systemic application was all they ever needed .. no repeats ... so .. again.. why are they so precious .. that you just cant get rid of them??? ... the only reason .. that i would accept .. is that they are great grandma's heirloom ... and even then ... i would probably.. guiltily get rid of them ... think of it as an opportunity to add something better.. ken |
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| No, euonymous scale overwinters as the fertilised female. If you are serious about keeping a planting of it then you will have to get aggressive about control. It should be pruned very severely and all of the pruned and infected material needs to be removed from the site. I got it in a massive planting of purple leaf winter creeper and successfully eradicated it in one go-around. I pruned it to within an inch of its life, raked all the debris away and burnt it, then sprayed the entire area very thoroughly with horticultural oil. It's 100% effective against all stages of scale because it smothers them. That was probably fifteen years ago and it's never been back. If a pest is indigenous to your area, then you can take it to the bank that it successfully has a method to overwinter. |
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| Ken, your solution is to always ditch the plants. I don't want to throw away otherwise perfectly healthy plants because of an insect infestation...that would be a shame. I just can't bring myself to do it. If nothing else, I'll try my luck with either systemic, horticultural oil or both, before I eradicate the plantings. It's worth a try. So, I purchased horticultural oil and doused the entire plant, and I'll do that again in a couple weeks to be sure I got everything. A systemic works its way through the roots, and doesn't stay in the soil, is that correct? I'm all for organic gardening, but in certain situations I can justify using chemicals, this being one of them. Aside from the cost factor, what's the real harm? |
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- Posted by ken_adrian z5 (My Page) on Sun, May 8, 11 at 8:33
| oh my whatever makes you happy is fine with me.. you post to get divergent views .. one would hope ... if you use the systemic.. then the oil is redundant ... knock yourself out.. but dont poison yourself for this plant.. IMHO .. good luck ken |
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| "oh my whatever makes you happy is fine with me.. you post to get divergent views .. one would hope ... " Of course, Ken. :) The written word can be easily misconstrued..and taken out of context. I value your opinion, and the opinions of others, and learn from all. My thought was...use the oil, but use systemic to prevent future infestations...perhaps that's overkill. I thought the oil would give an immediate result, whereas the systemic is not. I'm lacking in patience. If this is an ongoing issue, in future years, I will consider replacing, of course. I am determined, for the interim, to resolve it, hopefully to finality. LOL. Only time will tell... thanks
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