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heather1023

Mealybugs on Phal - Repot asap or after blooms fall?

heather1023
8 years ago

I bought a phalaenopsis in bloom about 2.5 months ago to keep in my office at work. It's about 3 years old with two main spikes that each branch twice.

About a five weeks later, and after being away a week, I noticed it had mealybugs. Right away I spot treated the areas I could see with alcohol and a cotton swab. The next day I sprayed it with a Bayer neem oil to make sure I got in all the crevices, then swabbed out between the leaves and wiped off any dried residue later. I sanitized the clips. I followed up and did it again a week later when I saw a couple more, which I expected from their life cycle. Then over the next couple days I poked and prodded and looked from what I thought was every angle. I did some more research, because I am new to orchids. I thought maybe I was in the clear for a while. If not, I knew I would have to take more drastic measures.

Then this morning I came in after the weekend off and found 3 blooms had drooped and a couple visible crawlers. I had lost one here and there, but I had also gotten two to bloom. Time to get serious. I unbent a paperclip to use to individually removed adults and wipe them on a paper towel. While going about it this way I found that they were hiding up under the anther of 6 of the remaining blooms. No wonder the spray hadn't been completely effective! (Surprisingly I haven't found any information related to this in my web searches) I twisted up a tissue dipped in the neem and was able to get inside and follow up with my paperclip tool to remove them. I kept going back every half hour or so to check under there and between the sepals/petals to make sure I got all the crawlers.

So after all that my question is: I know I'm going to have to replace the potting material. Can I wait until the rest of the blooms fade or am I putting the plant at risk to further damage? It's only July here on the east coast of the US, so should I also prune now or can I wait to see if it will produce more blooms? I can see potential for buds at the end of the current spikes and a possible new branch from a dormant bud on the base of a spike.



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