Worms in Grain Sorghum

Worms in Grain Sorghum

Unfortunately it seems that most of the full crop grain sorghum fields are or are becoming infested with the Beet Army worm. So far they have confined themselves to the 6 to 8 inch sorghum locating themselves in the whirl, such as it is on such a small plant. It is significant that it seems to be the Beet Army worm since they are known to have a resistance to the pyrethroid chemical group ( such as Grizzly, Bathroid, Warrior, Mustang Max, etc. etc.). Many producers, consultants, etc. to our south and southwest where they have been fighting them earlier this year have informed me that they have already tried many of the pyrethroids and have had limited success. Many describe it as suppression only and have now gone to the "bigger guns" in the chemical arsenal.

For this reason I would suggest (again unfortunately because of costs) that they be sprayed with a chemical such as Belt at a 2 ounce rate,

Producers should keep a watchful eye on the grain sorghum that is just emerging. So far so good on that size of plant........but if you see some missing or cut off plants you may have to apply an insecticide.

 

  Beet Army Worm larvae. They are presently smaller than this picture, but that black dot 1/4 of the way down the body can be seen with a magnifying lense in the field.

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