Alfalfa Insect Update

Alfalfa Insect Update

Okay.......The weevil have started hatching in North Central Oklahoma. The ones I have found were very small and inside the bud, but I have had reports that they have been found outside the bud, but still very small.

This does not mean you should necessarily run out and spray your field now.  One economic threshold is 25 to 40% tip damage or 3 larvae per stem. 

It does mean you should closely monitor your alfalfa crop.  It would be nice if we can get a little more growth on your plant to cover with the insecticide. This would provide more coverage for the plant and get us a little farther down the road with the length of residual, but it is a fine line and needs to be watched.

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