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Could be the environmental change. Remove damaged leaves and continue to re-pot. Be sure to only go one size up. This link will tell you more about your plant;
https://www.gardeningknowhow.com/houseplants/philodendron/brown-philodendron-leaves.htm

I think you may be overwatering your plant.
Philodendron can tolerate drying out a bit between waterings.
If the soil remains moist or soggy the plant can suffer from root rot.
Make sure the pot has an adequate drainage hole for excess moisture to drain from the soil.
Medium to bright light location is best for your plant.

Here is a link with more care information.

https://www.gardeningknowhow.com/houseplants/philodendron/caring-for-philodendrons.htm

The top inch or so of your soil should dry between waterings.
Make sure the pot has adequate drainage holes so excess water can drain from the soil.
This sounds like overwatering so always check the soil, don't water on a schedule.
If you think the plant has been overwatered, you can life the plant from the soil and check the roots. They should be firm, if the roots are soft and mushy, this is root rot.
You can trim the bad roots away and repot if fresh soil
Philodendron can recover if there is enough healthy roots remaining.

https://www.gardeningknowhow.com/houseplants/philodendron/caring-for-philodendrons.htm

You may need to trim the plant and also trim the roots.
Water needs to be changed periodically and a water soluble fertilizer can be added.

Here is a link with more information.

https://www.gardeningknowhow.com/garden-how-to/projects/growing-houseplants-in-water.htm

Since you are trying to eliminate plants in an area where animals are I have listed some ways to naturally control weeds.
You can also pull up the plants to slow the growth rate.

https://www.gardeningknowhow.com/special/organic/using-salt-to-kill-weeds.htm
https://www.gardeningknowhow.com/garden-how-to/info/use-vinegar-in-gardens.htm
https://www.gardeningknowhow.com/special/organic/using-sugar-to-kill-weeds.htm

Is it possible that the yellowed plants are receiving more or less water from the sprinkler than the healthy ones? Overwatering and underwatering can both cause yellow leaves and poor plant health.

Another possibility is an insect infestation that is spreading from plant to plant. Check carefully for insects and damage symptoms.