The white marks look like mealybugs to me. I just wipe them off and kill them with my fingers. If that is too gross for you, wear gloves or wipe with a wet cloth or cotton ball.

I am generally opposed to using chemicals except when necessary. I did buy some weed-killer that says it's specifically for "woody vines" or something like that. After pulling up/out as much ivy as possible, I am carefully painting the weed killer on the new leaves when they appear. It seems to be working, as I have not seen much new growth. On one rock retaining wall, I also painted the weed killer on the cut stems when I couldn't pull them out. That seemed to be very effective. Roundup will work and is supposed to be relatively environmentally benign. Everything is relative, of course. It is much more environmentally friendly to just pull off the new sprouts when they appear. It will take longer, but eventually the plants will die if they don't have leaves to make food. I agree we should make ivy illegal.

Katie, your house is waaay cool. I live in a house about 10 years older than yours, and I'd like to share what I've learned: The dark wood molding, with its many imperfections, has grown on me in the year we've been here. The dings that drove me nuts a year ago are now character and patina, and I NEVER thought I'd see it that way. I have had great luck with Farrow and Ball colors. Dorset cream in living room, mouse's back (unbelievable color, you really have to see it with the old wood to appreciate it) in the family room, and light stone in the dining room. I also have farrow's cream in the hall and stairway, but i think it was a mistake; dark wood can take much darker colors than you think, and they all look several shades lighter up on the walls. There seem to be a lot of strong opinions about custodianship, which may or may not be off-putting to you (disclaimer: I've got a foot in the custodian camp too). But look at it this way: from a resale standpoint, as the years go by, a well-maintained older home with original details will pull ever and ever higher premiums from buyers, so you will reap the rewards of your "custodianship" in very tangible terms when the time comes. So, to me, self-interest and good custodianship actually align. Also, you will sometimes save money while you're living there if you have chosen period appropriate finishes, materials, colors, and decor: because they are timeless. I was over on the kitchens forum, and people were moaning about their "so-80's kitchen" and how to make it less dated. If you do things to the original decade of your house, they will never look dated: only timeless. You will never need to redecorate when styles change unless YOU want too. Now that's freedom! Finally, I found, and you may find too, that the styles appropriate to your house grow on you. When we bought our house, the first thing we did was remove the bronze statue from our newel post so we wouldn't clock ourselves when we moved in. We NEVER intended to put it back up, and almost gave it away to a neighbor. Well, it has grown on me, and I look forward to the day that I put the other "lady of the house" back on the newel post. (Dh would probably tell you are days that he wants to screw my b... on there--naw we usually get along lol!) So, enjoy!!!!

Some of the leaf yellowing also looks like normal leaf aging as well, especially in the third pic. But there does appear to be a disease in the first two pics. Based on your photos, it looks like bacterial speck, which I get in my garden. But it could also be septoria. The response should be the same though: spray a copper fungicide regularly and prune off foliage at the first signs of disease. Don't let it sit on the plant the way it is now. You can alternate between Serenade and copper weekly, Re: bacterial speck and septoria--they're definitely far from the worst diseases you can get. Septoria doesn't affect fruit at all, for one, and speck doesn't always affect fruit. Both are relatively slow-moving diseases. You can usually keep a plant with speck or septoria alive and bearing until the end of the season. If you do end up getting spots on your fruit from speck, it's cosmetic and only on the surface, and the fruit is completely edible. As long as you don't have to sell it at market, it's not that big of a deal. The standard recommendation, however, is to never use diseased fruit in canning, as compromised fruit can have an altered pH, and proper acidity is important for canning safety. Re: nutrition--your regime sounds fine, so I would suspect the yellowing is from a combination of the disease and normal leaf aging.