4 strains in a 2x4

Make sure you let your soil dry completely between waterings. Since your plant is smaller focus watering near or around the plant. I use diatomaceous earth and gently sift it around the plant. Another solution is to place some distilled vinegar in a bowl with a drop of dish soap to break surface tension. This works buts smells unpleasant. Sticky yellow traps do the trick as well. As long as your medium isn’t completely infested your plant should be fine.

Let them decompose - could be worth bringing in microbe boosters and maybe some fungus as these will assist with natural deterioration and provide nutes to the plant.