Date of this Version
Dates for initiating alfalfa weevil scouting are provided, based on 30 years of climatic data used to estimate appropriate degree day accumulations for northern and southern Nebraska.
Sampling activities for alfalfa weevil need to be timed properly because it is inefficient to sample when the pest is not active or present. Conversely, delayed sampling is financially risky because economic damage can occur before a management practice is implemented.
Integrated pest management programs often use degree day accumulations to initiate activities, while producers often use calendar dates. Calendar scheduling is traditionally based on subjective experience rather than research.