March 5, 1999

Dothistroma Needle Blight

Austrian pines are particularly susceptible to Dothistroma needle blight. Austrian pines showing this disease arrive frequently in the Plant Disease Clinic. The causal organism is the fungus Mycosphaerella pini.

Selection and Care of the Easter Lily

A popular symbol of Easter is the trumpet- shaped, white, fragrant flowers of the Easter lily (Lilium longiflorum). Plants are available from flower shops, greenhouses, and other retail outlets.


Select a compact plant with dark green leaves, 1 or 2 open flowers, and several unopened buds of different sizes. These plants should bloom for 2 or 3 weeks in the home if given good care.

Care in the Home

Indoor Topiary

Topiary or living sculpture was first created on outdoor trees and shrubs by the Romans. Tree or shrub topiaries have been practiced for centuries in many formal European gardens. However, this concept of living sculpture is a great way to grow and maintain several types of houseplants and tender herbs. While many different types of topiary have evolved since its creation by the Romans, three basic types of indoor topiary are pruned, hollow, and stuffed.

Propagation of Grapevines

Grapevines are typically propagated by hardwood cuttings. Since large, established grapevines are difficult to transplant, hardwood cuttings can also be used to save older plants.

Toxic Cleanup Days for 1999 Planned in Nine Iowa Counties

Residents in nine Iowa counties will be able to dispose of certain hazardous waste materials during Toxic Cleanup Days scheduled this spring.