Wildlife Damage Management, Internet Center for


Date of this Version

February 1978


Published in Proceedings of the Second Eastern Pine and Meadow Vole Symposium, Beltsville, Maryland, February 23-24, 1978, Ross E. Byers, editor. Copyright © 1978 Glaize.


By 1973 Endrin in Virginia was pro-Ting ineffective. Mice were resistant to Endrin in Most orchards.

Dr. Horafall had started work with Chlorophaclone (C.P.N.) just prior to 1973 and Virginia had cleared it for experimental use.

In November we purchased a considerable amount of the first that was manufactured.

The first C.P.N. that was applied at the recommended rate of .2 lbs. per acre was very effective. The weather was fairly warm and according to our checks we had 90 percent control.

Unfortunately, part of our C.P.N. separated due to a bad formulation and we could not complete the job.