Powder River Examiner -

PR Extension 

Alfalfa Weevil Population Increasing


Alfalfa weevil are the key insect pest of alfalfa, causing variable levels of economic damage across Montana each growing season according to Powder River Extension Agent Mary Rumph.

“The weevil had a slower start this spring,” reported Rumph. Field monitoring on May 26th resulted in just a few adults; a week later, ten larva per sweep were detected, said Rumph. The alfalfa was 22” tall on June 2nd. On the 9th of June, the alfalfa was 28” tall and had a multitude of tiny larva per sweep, however, there was no evident damage to the forage.

“So, the weevil are present, and pres...

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