SPOTTED ALFALFA APHID CONTROLS

 In the fall, many alfalfa producers treat their new stands for spotted alfalfa aphids. Most of these situations are clearly warranted; however, often control is unsatisfactory.  

A half pound of Lorsban^®/acre or 0.15 pound of Pounce^®/acre with as much water as possible when the temperature is warm and the wind is light should do a good job.  

In light of reports often received of ineffective aphid control, it seems like a good time to summarize a few points about this insect and its control.  

The spotted alfalfa aphid is a mild weather pest, but cold temperatures do not eliminate them from fields. In Oklahoma, they can be found throughout the winter months.  

Cool temperatures (less than 55⁰F) are not conducive to good performance of most insecticides.  

Insecticide application in high winds does not result in good control.  

These tiny insects are feeding on the undersides of leaves or are tightly hidden at the base of the plant. This makes the spotted aphid difficult to control during fall and/or winter.  

Dry conditions generally do not result in good control of insects if low rates of liquid are applied. Ground applications with a minimum of 10 gallons of water is suggested. To obtain consistently good results, use up to 20 gallons of water/acre.  

We cannot control some of these factors. If everything that can be controlled is correct, it will make the job easier and hopefully more effective.