No. Let them mature naturally. They are photosynthesizing food that will get stored in the rhizomes to create next year's starts and bloom buds. Yellowing leaves are functioning better for them than no leaves at all.
If you are concerned about insects, try some Cornell spray:
In a 32 oz spray bottle put:
1+1/2 teaspoon neem oil,
3/4 teaspoon baking soda,
a small squirt of dish liquid,
Then fill to the top with water.
This worked well to get rid of an iris aphids infestation last year.
