Proper monitoring of weevil populations contributes to efficient pecan weevil management. Population monitoring provides necessary information for the need and timing of insecticide applications. Timing of insecticide applications for weevil control should be determined from the presence of weevils and not strictly on a scheduled or preventative basis.
Several factors can influence the time of pecan weevil emergence.
Pecan weevils usually begin to emerge from the soil during July or August. Weevil emergence time within a single orchard is frequently different between sandy soils and soils with a fine texture. Additionally, even though environmental conditions favor rapid weevil emergence, weevil will generally emerge from the soil from July until October. Adult Pecan Weevil Weevils that emerge while the nuts are in the water stage feed on the nuts causing abortion. Weevils will continue to lay eggs in the nuts until the shuck splits.