What is the single-most important cultural practice that can be done to suppress damage from most turf-insect pests?

The correct answer is letter "A": timely irrigation.

Explanation:

Turf-insect pests are usually caused by sod webworms, chinch bugs, or billbugs, for instance. They usually affect residential lawns and parks at the point of eroding all vegetal life in those areas. It is crucial to identify the type of insect attacking the lawn to choose the correct insecticide. Besides timely irrigation is necessary to avoid the eggs of these insects to grow in number exponentially.

if it is easy u should do it but...

its 60-10+x why, because she bought the dress with $60 and she received $10 dollars back. We don't know the variable.