The Fourth Annual Greenhouse Management Workshop will be at the Holiday Inn Select in Naperville on June 4. The registration fee is $30 for Illinois Greenhouse Association members and $45 for nonmembers. The program follows:

10:00 to 11:00 a.m., "Mighty Mites": All Spider Mites Are Not the Same. Raymond A. Cloyd, assistant professor, Extension specialist in ornamental entomology, U of I, Department of Natural Resources and Environmental Sciences, Urbana.

11:00 a.m. to noon, Misconceptions of Plant Nutrition. Kimberly A. Williams, associate professor, floriculture nutrition, Kansas State University, Department of Horticulture, Forestry, and Recreation Resources, Manhattan.

Noon to 1:00 p.m., Lunch.

1:00 to 2:00 p.m., Biofungicides for Use in Greenhouses. Russ W. Wallace, BioWorks, Inc., Orem, UT.

2:00 to 2:45 p.m., Calibration and Calculation: Going from Large to Small Volume. Cloyd.

2:45 to 3:00 p.m., Break.

3:00 to 4:00 p.m., Water-Quality Issues. Williams.

4:00 to 4:30 p.m., Conclusion and evaluation.

For information, contact Raymond Cloyd at rcloyd @uiuc.edu or (217)244-7218.