My impression is they both work more at night due to fewer predators. I find most of the PC at night (lots of orchard work happens for me at night with a headlamp, I am often too busy during the day). So far this year I have found and crushed 4-5 of them. I love the crunchy sound they make 
1 Like
Scott,
So you can find a PC bug at night? Can you post a picture of it? I probably should go out at night to hunt down some if I know what it’s like…
Tom
I’d like a dog, but probably will never get one.
This is from this today… i found 2 active curculio on my Alderman plum. I did spray this so there is some clean fruit, but i select sprayed and didn’t hit any of the fruit that already had scars (which it had many at that point). This plum is “meh” but its a pretty tree and i’m adding some other fruits to it (i cut off a major limb this spring where last spring i budded in a plumcot which is growing now). Some Tomcot apricots and one plum with 9 egg laying scars.
Superior Plum with PC hit
Tomcot Apricots (these have been sprayed)
Alderman Plum (with lots of PC hits)
PC on a plum (before he was squished)
It never ends (9 hits)
Scott-
They like cloudy warm days like today… They also seem to stay in shaded areas of trees on sunny days. I have heavy PC pressure here due to wild plums nearby (or so i think)… These wild plums were removed by the state because they did a bunch of grading for a new road (and planted grass over everything)…so maybe i’ll see less pressure …eh…probably not!
Ouch, its painful to look at those plums with all those bites. I was finding a few like that recently.
I find it important to date when the bite happened because you can tell if you are looking at a problem you need to deal with NOW or one that may be solved and you are only looking at old damage you missed earlier. Your pictures are a good example, the top plum I would guess was damaged two weeks ago and the bottom one two days ago. If the egg was just laid there is no browning. Once there is browning you are a day or two in and date it by how well the gash has healed. That lower plum looks to have not healed much at all. If I see too much fresh damage I get out the Surround and add another coat. If I see too much old damage I just curse.
Looks like bunch of smiley faces, laughing off at us fruit growers! 
Has anyone ever seen more than one PC grub inside?
never seen this many bites on one fruit! Can you dig the egg out?
Once in a while I take a surgical scalpel and make a triangle cut with the bite right in the center and removed that piece The apple will heal over with an indentation. I do this to the fruit with a single bite. I think you can make a cut with a small sharp knife or a razor box cutter.
Tony
I found a plum with 17 egg laying scars on it this evening. Also found a dead PC (i suppose after laying that many eggs) on the apples.
I will say the fruits that were sprayed early and often are clean. Nectarines, pluots, peaches, some of the plums. All I’ve used is permethrin on those fruits. Around here if you miss those early sprays, you pay big time.
I do toss all the fruit with scars… I’ve been thinning most of them out.
Apples can handle PC…the problem makers are the ones that drop.
Nice chart from MSU… i just looked…as of the 27th of May i was at 552 gdd (if i’m reading everything right)…its been very warm so we added to that, so egg laying should be about done now.
Its a good thing to watch GDD …the timing is almost always dead on…i use it to watch for Rose Chafers and Japanese Beetles. The state here in WI has a chart that seems to update weekly.
Rob, what site to you calculate GDD from? If there was something I could bookmark it would be sweet. The weather.com page gets you the number but its a bit clunky.
That chart is not completely accurate for me, I am at 900 GDD now and I was seeing new bites less than week ago. I think I am finally done now.
@tonyOmahaz5, if I see a fresh bite on a tree with not many fruit I also sometimes cut it out, the curc has not gotten very far in and you can nip it. I did that on several Euro plums that are fruiting for the first time this year.
Scott
Scott
I thought I am the only one who is cutting the PC bites out. I’m glad that I am not alone on this. Like you said, you are waiting several years to taste the fruit for the first time and will take special measure to save the fruit.
Tony
Seems like cutting the bite off would only work if you can see the egg. If you can’t see the egg, then predator took it or the grub has already entered the fruit.
You cut the fresh bite which means the egg is not too deep and at this point the fruit is only marble in size so not much predators care for the wound. The cut will heal pretty fast. This is the last resort trying to savage the fruit.
Tony
For Wisconsin I found this…
https://datcpservices.wisconsin.gov/pb/pests.jsp?categoryid=36&issueid=240
This is for the US
http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/cdus/degree_days/grodgree.txt
16" of rain this month has sent mine into overdrive. I’ll have to prune soon and I’m sure again not too far off.
Last picture was April 4th.
Mike
Wow! Just wow! I’ve gotten 2 rains for a total of barely an inch this month. My trees are not in overdrive. It’s more like I’m trying to get enough water to them often enough to keep them from just dropping everything.
Muddy
I always thought y’all got plenty of rain there. We’ve gotten 5" in the last three days and highs in the lower 40’s. The lawn took off! Some warm weather will kick it especially foxtails. Apples have grown 2-4" today it seems like and all the still viable bench graphs popped green tips too.
Well, I don’t need 5" in three days, but 5" for the month would have been nice. Cut the grass the end of last month. It wouldn’t actually need it again except that the dandelions wave their yellow heads above it, and that it’s gotten a bit lush and tall where I get it soaked from runoff when I’m watering trees and veggie gardens. We do usually get plenty of rain in winter and spring. Nature can be stingy with rain in summer here, but hurricanes can change that. We’ve got a decent % chance for several days next week. June is often dry enough that ground and vegetation moisture levels are pretty crispy as July 4th approaches.