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G95-1254 Weed Control In Alfalfa, Robert Wilson, Gail Wicks, Alex Martin
G95-1254 Weed Control In Alfalfa, Robert Wilson, Gail Wicks, Alex Martin
University of Nebraska-Lincoln Extension: Historical Materials
This NebGuide describes how weeds can be controlled in alfalfa. Weeds can interfere with alfalfa from the time of seeding through the life of the crop. Increased weed density in new seedings of alfalfa can decrease alfalfa stand. Weeds can also substantially reduce yield and quality of established alfalfa. In severe situations alfalfa yield can be reduced over 50 percent from weed competition (Figure 1). As weed content increases, the percentage of alfalfa in forage declines. Normally the quality of forage declines as the percentage of weeds increases.
G95-1263 When To Sample For Alfalfa Weevil, Steven J. Meyer, Robert K.D. Peterson
G95-1263 When To Sample For Alfalfa Weevil, Steven J. Meyer, Robert K.D. Peterson
University of Nebraska-Lincoln Extension: Historical Materials
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.