Could be fire-blight as this is rampant here (never seen such a bad outbreak as this yr). If so, not sure what can be done.

where is the fruit??? ... what kind of pear???

just like bugs and weather... leaf diseases ebb and flow over the decades ....

i wouldnt waste any time or money on this thing .. and just see what happens .... even if that is.. eventual death .. so be it ...

imo ... a tree that size.. if you wish to invest money in it ... should be sprayed by a professional ...

if this is a fruit tree.. the experts in the fruit forum might have other ideas ...

where are you ..a short clal to your COUNTY extension office might get you some general info on what plague is currently happening .. in your area....

and.. fert spikes are useless and worthless ... skip those next time ...

ken

BTW .. thats some pretty nice grass .. was it recently sodded .. or in the alternative.. what products have you been using on it ... also.. a soil test might indicate anything lacking in your soil... but for the tree to get that big.. i doubt anything significant is missing ...

PS: spray timing is imperative ... you are not going to heal those leaves by spraying after its too late ... make sure you research that side of the equation ...

Thank you, Ken! I'm no expert, but I believe it's a Bartlett. I appreciate your direction and the reality check. I am in Colorado, and will reach out to my County extension. I believe CSU is touted to be a good resource too.

Thanks for noting the grass. I've been working to repair the grass since buying the house 5yrs ago. Lawn grass is often stressed in our climate, and some just don't fare well at all. It's taken a couple years of planting new seed for this climate to have look half decent in this otherwise arid climate.

I think I'll reach out to the County extension office for the details on what's hindering our fruit trees last and this year. Maybe I'll be lucky enough to not have to pay the arborists to come by.

Thanks again, y'all! I appreciate your helpful feedback.