04/02/2026
As spring arrives, shifting temperatures and rising humidity create ideal conditions for powdery mildew to develop and spread rapidly, especially inside greenhouse structures.
Identifying Powdery Mildew on Most Ornamentals
• Whitish-gray, talcum-like powdery patches on upper leaf surfaces
• These patches (colonies) often coalesce to completely cover
leaves, stems, and in some cases, the entire plant.
•Sometimes confused with spray residue.
Managing Powdery Mildew and Other Diseases
Besides managing the humidity levels in the production area, maintaining disease control on surfaces, in water and on crops is essential to reducing cross-contamination and development of pathogens.
Pace KleenGrow is a multi-use, EPA registered product that provides safe, effective, broad-spectrum control of water borne pathogens and algae in irrigation systems, plant pathogens on greenhouse crops, and diseases, viruses, and algae on hard surfaces. It offers powerful residual protection (up to 14 days on crops and up to 30 days on hard surfaces) and is a value tool for growers for managing plant diseases such as powdery mildew.
A clean environment, combined with protected crops, leads to healthier, more resilient plants. Use KleenGrow this spring as your season long insurance policy.
KleenGrow is not registered for the control of algae in the state of California
https://pace49.com/files/Chase-Powdery-Mildew-Review-202412.pdf