I don't know about aphids, since I don't start seed indoors.
But... About the search. I set my preferences to have a lot of posts per page - that helps with the way I search. I usually have mine set to 100.
If I searched the daylily forum for aphids, I would then click on a likely thread, THEN I would use the browser find feature once I have the thread open. I have a Mac, and my Browser is Safari. So I do a "command F" for find, then I put in aphids, and it will take me right to the word aphid. Safari has little arrows in the find that you click to go to the next "aphid" word. You need to do ths for every page of the thread...that is why it is handy when searching to set your ATP preferences to show a lot of posts per page.
I would think that the PC would have a similar additional search function.