Calendar of Events Plant Disease Workshop. April 26, 9:00 AM - 12:00 Noon. Indiana Extension Office. Indiana, PA. Contact: Armstrong County Extension. Phone: 724-548-3447. Plant Disease Workshop. April 27, 9:00 AM - 12:00 Noon. Beaver Campus, Pensilvania State University, Monaca, PA. Armstrong County Extension. Phone: 724-548-3447.