Hmmm. It kind of looks a bit like the forum thread you suggested @lesliecole49, but according to mr google it could also be woolly aphids. I really don’t know what to think, but I removed the affected leaves to be on the safe side. Let’s hope no more will appear. Thanks @sushiwaitress @ankur1406 and @lesliecole49
They just don't look like a wooly aphids to me. I have host trees for them so I see them often. Not saying these aren't, wooly aphids are known to infest citrus trees. I use neem oil for all the pests I find. Good luck, nasty little bugs! When the woollys are in our trees, they poop honeydew of course this lands on anything below the trees and that turns into sooty mold. It's not unusual around here to see a vehicle going down the toad covered in mold. Car washes do good business around here!
I agree that it doesn’t look exactly like woolly aphids, but it might be due to all that wet stuff. I did notice quite a few hoverfly larvae nearby, so it seems to be something they are interested in, at least. I’m keeping a close eye on that lemon tree now, and it doesn’t look like there are any more leaves developing anything — so far, so good, right? Fingers crossed 🤞 @lesliecole49
After some trial and a lot of error, I finally manage to keep the greenhouse frost free. But there were quite a few freezing nights that obviously were tough on my citrus. Now there is splitting along the trunk, but I still have hope. Maybe I’m a dreamer, but at this point I need something to believe in.
That big lemon is slowly turning yellow now, but the smaller ones are bright green so I don’t expect them to be ready until spring - if they are still hanging on. I think if I control the moisture, the tree should cope with quite a bit of cold. Air temperature in the greenhouse will go below zero, but I doubt the soil will freeze. @gjones @jacaranda
Thank you @cyndi, that was a really useful link! You seem to have information on just about anything! I will be trying one of the lemons soon, so exciting! There is also a green one and some tiny beginnings of fruit as well, so hopefully I won't mess this up - imagine having my own (small) supply of homegrown lemons, that would be such a luxury!
Thank you @columbiariver and @gjones. I have always wanted a lemon tree, but I had decided it was too extravagant to just go out and buy one. I do have a citrus that I started from seed about 15 years ago. That tree looks great, but chances of fruit probably aren't great, as I used a clementine (I think) from the supermarket, and I'm sure they are accustomed to a lot more light and warmth than I can give.