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  #1  
Old 12-18-2009, 01:25 PM
dmacch dmacch is offline
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Scale on orchids
Default Scale on orchids

What do the growers on this forum use to treat scale effectively on your orchids? I had a bunch of phals in the greenhouse last spring that were doing great and I treated them two consecutive weeks with Bayer rose and garden systemic. Within a couple of weeks after the second treatment all their leaves started shriveling up and I basically lost all of them. I can't figure out if I just overwatered them in my zeal to rid them of the scale, the moss was still moist when I treated them a second time, or the systemic I used poisoned them. Any thoughts on this? Thanks
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  #2  
Old 12-18-2009, 01:45 PM
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Gin Gin is offline
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Was it the spray on Bayer in the blue bottle ? or the Bayer Tree and Shrub ? I have used one or the other with no problem the Tree and shrub diluted as a drench or the other in the blue bottle as a leaf spray . Gin
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  #3  
Old 12-18-2009, 02:10 PM
dmacch dmacch is offline
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It was the rose and garden drench
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  #4  
Old 12-18-2009, 02:14 PM
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cb977 cb977 is offline
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I use a 50/50 mix of rubbing alcohol and 409 cleaner.
Spray it on and wipe those little buggers away.
I usually give it another spray and then rinse a few days later.
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  #5  
Old 12-18-2009, 06:46 PM
orchids3 orchids3 is offline
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I have used Bayer Tree and shrub without a problem and it did a good job but they changed the formula to include a fertilizer later on - I and not sure about the new formulation.
Dog shampoo mixed with alcohol and water does a good job. Get cheap shampoo with no lanolin.Use one part shampoo and one part alcohol and 8 parts water. I sometimes use a little ultrafine horticultural oil as well but beware using the oil iwhen the temperature is over 80
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  #6  
Old 12-18-2009, 08:47 PM
Lagoon Lagoon is offline
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I was just about to suggest the horti-oil aswell.
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  #7  
Old 12-18-2009, 11:00 PM
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Scale on orchids Male
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I picked them off my chids then I had them and soked em in rubbing alchohol a couple times. that got rid of em
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Last edited by wgama; 12-19-2009 at 02:03 AM..
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  #8  
Old 12-18-2009, 11:20 PM
orchids3 orchids3 is offline
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Yes controlling scale on a few plants can be done with a close watch and even a larger collection but the problem is differant for 4500 to 5000 plants when a problem is over looked for a while. Thats why hand watering is important - look closely at each plant as you water it and take corrective action immediately - its easier. Its real trouble if it gets out of control even a little. Scale is a problem I paticularly hate. It takes persistance to keep it controlled.
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  #9  
Old 12-19-2009, 01:46 PM
quiltergal quiltergal is offline
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You need to treat the larval stage down in the media as well as the leaves. Otherwise it just keeps coming back.
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  #10  
Old 12-19-2009, 01:57 PM
johnblagg johnblagg is offline
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Scale on orchids Male
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I like permethrin myself kills on contact and is residual as well.I have used it on catts and paphs as well as my phaius ....basicly the same as some dog shampoos.

I use it as a drench and a spray but I do silute it more than it says on the lable.
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