What is the economic threshold level and the damage threshold level for turf and how do they differ?
What will be an ideal response?
The economic threshold level is the point at which the pest infestation requires immediate, intensive control to prevent unacceptable aesthetic changes. The key to the answer is that threshold is a measure of pest population or density. The damage threshold level is also a measure of pest population or density that initiates some change in aesthetic quality. This includes any change not just an unacceptable level. In practical terms, the damage threshold level is always reached before the economic threshold level. The turf manager should monitor a turf for changes above the damage threshold level. This gives he/she an early warning system for the economic threshold level.
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