This looks like the fungus Colletotrichum dracaenophilum.
Any infected part should be cut off and tossed. And this is recommended for treatment on even the part of the plant that looks clear.
I had a hydrangea with fungus spots. I use this. https://www.amazon.com/Spectracide-Multi-Purpose-Fungicide-16-Ounce-Concentrate/dp/B0035H0RA8/ref=pd_bxgy_img_2/139-2811464-4295620?pd_rd_w=xkFK0&pf_rd_p=c64372fa-c41c-422e-990d-9e034f73989b&pf_rd_r=23N5RS1SS5XDJA75RACA&pd_rd_r=c2c046f...
Preferably, outside if possible. Until it dries, it smells.
Powdery Mildew should be considered a health hazard IMO. I would refuse to trim any plant that has it. I am also super allergic to the PM spores.
In this day and age, a grower has no excuse. I haven't had PM in over 5 years since I made it my mission to never deal with it again.
While you aren't the grower, tell the people you work for that they need to use a product called "Immunox" by Spectracide.
Of course only use this on plants pre flower (in veg). This stuff straight up CURES powdery mildew. I'm surprised not more growers are using it.
If their intake isn't pre-filtered the PM will just come back.
I prefer closed growing environments because once something is cured, it is cured for life unless you re expose the space somehow again.
If you are just allergic to the THC crystals in the air, or even the plant itself. Allergy medicine taken weeks in advance will help you out. Allergy medicine aren't very good at dealing with an allergy attack after they occur. Its better to prepare your body beforehand. Also wearing a light dust mask should be beneficial.
Lastly, kindly ask the growers if they have a carbon filter that they could set up in the room to continually scrub the air clean. You can even position it so that only fresh air gets blown on you.
Good luck!
It continued to put out 4 to 5 leaves but struggled with the same symptoms the whole way until it ultimately succumbed to whatever issues it had.
At the time I was not very familiar with including insecticide and fungicide in my watering schedule with indoor plants. But I wish I had been because I bet one of those could have solved whatever unseen issue the roots were dealing with. In case you're interested I've linked the two items I've started using and have found success with remedying issues in my plants. I just combine them in the water. https://www.amazon.com/dp/B0035H0RA8/ref=cm_sw_r_apan_glt_i_3Q9DN56G0RHZCADKY09F?_encoding=UTF8&psc=1
I haven't had any good results with copper against powdery mildew. I always end up just using Spectracide Immunox multipurpose.
You have Botrytis- use this once a month on all your plants here