Thanks, Olpea. I corrected my typo. There should have been a “don’t” in there. I have a tendency to leave out the words “not” and “no” when I type, and wind up saying the opposite of what I mean to. 
Yes, the southeast does have relatively intense insect. weed, and fungal pressures. It goes along with our fall through spring rainfall, high humidity, ground that doesn’t freeze and reduce them, flowering vegetation throughout the year, and hot, humid, frequently drought summers that weaken even older established trees. But mainly, I take the blame for these problems because it took me far too many years to realize that Nature is a recycler and not something that cares whether I get a usable crop of anything. I’ve been providing opportunity and fodder for a whole range of problems. Everything from lack of pruning because I thought trees would seek their naturally best shape, down to refusal to use pesticides/fungicides/bacteriacides simply created a an environment that was increasingly conducive to problem bugs and fungi than to getting edible fruit.
The Triazicide was fresh off the shelf. But as you say, that doesn’t necessarily mean it’s fresh. However, the plums blossomed slightly later than usual and we had plenty of days up to the 80’s before that. Also, many (not all) of the tiny fruitlets already had the telltale quarter moon entry point when petal fall was complete. The 2 plums are next to each other and one completes bloom slightly later than the other. I waited for both to be done. The blooms were late, but the bugs were early and heavy on full sized standard trees.
I’ve been spraying every two weeks on the dot. with the pump sprayer that I lug around. Drenching them from bottom to as high as I can get. The very tops are not covered as thoroughly on the plums. Between the insects, late freeze, and very early fungal pressures, I may wind up with enough plums to count on my fingers. I’m continuing to spray those trees, even though I don’t expect produce - just in case they are still harboring nasties.
I started the Immunox late because it took me awhile to find it. Like I said, I did two copper sprays over winter, and trusted that would help with fungal control. Last week we had a week of days that were rainy, overcast, windy, and cooled down from the 80’s and low 90’s. I also walk and observe everything every day. The first day it was clear, I sprayed. It was very deflating to see that brown rot had, seemingly overnight, appeared on peaches, plums, and every one of my just ripe strawberries (the first ones of the year). This is very, very, early for that to show up for me.
I sprayed and removed every fruit that I could find that appeared infected, and continue to remove them. Then followed up with Captan a couple of days later. The Captan on the strawberries halted the outbreak. I hope the combo does as well on the peaches.
Simply as an aside, brown rot was not the only fungal infection that slammed vegetation last week. Powdery mildew on the base of almost every rosebud, and rust on all sorts of ornamental vegetation and weeds. I’ve been ripping out the rusty leaves/plants, but haven’t had the opportunity to spray the ornamentals this week. It was windy yesterday and rainy today…
So, that’s it. Plums and cherries are a wash for this year. Most peaches still have a fighting chance, largely thanks to following yours and Alan’s advice from other threads. Blueberries are as carefree easy as ever. Knock on wood, they always do well. Strawberries have shown me that they will need constant vigilance.
Thanks, Olpea. Any success I get with my fruit I owe to you, Alan, Scott, Fruitnut, and others who have freely shared their knowledge, experience, and expertise. My failures are due to me not looking at things realistically for too long.