Unfortunately they seem to come up to the surface of the soil when wet.I don't recognize these critters, but they seem to be living on top of the soil, which isn't problematic.
Thanks for your response! It’s been raining pretty hard for about a week here. It had just finished raining about 5 minutes before I took this pic. We are entering into a big heat wave now so should be drying out more! Hopefully that will help.Some sort of fly larvae. They are helping convert the organic fertiliser into plant useable compounds. I'm pretty sure they will not do any damage to your tree.
I am concerned about how wet the soil appears to be. Constant wet soil can kill roots and then the entire tree. The larvae are probably related to the soil being way too wet for long periods.
Wet soil for a few days or a week is no problem but try to allow the soil to get almost dry (check below the surface) before watering.
Those things are freaky looking, lol.Thanks for your response! It’s been raining pretty hard for about a week here. It had just finished raining about 5 minutes before I took this pic. We are entering into a big heat wave now so should be drying out more! Hopefully that will help.
Haha I'm definitely not a fan of them.Those things are freaky looking, lol.
Just put it in my profile (PA). Agree it is unusual I’ve never seen these before with my other trees. Also it’s been raining hard for the past couple days and I snapped this pic just after it had been raining. They do seem mainly concentrated on the fertilizer but seem to surface more when it is wet/rains.There are a lot of them, which looks a bit unusual. The soil looks very wet judging from only this picture.
Place you location in your profile
Interesting! I think you’re right after looking at some pics. Thank you! Will report.https://www.wikiwand.com/en/articles/Chrysomya
Harmless. The water probably forces them out of the soil because they experience drowning. Enjoy the free percolation treatment!
But do register that you saw it to the USDA; it's not a native animal.