Powdery Mildew on Greenhouse Beans: Fungicide and Ventilation

Introduction

Organic Serenade may not control severe powdery mildew on greenhouse beans.

Serenade May Be Insufficient

Switch to general-purpose fungicide from local supplier.

Increase Ventilation

Maximize airflow to reduce humidity.

Conclusion

Use stronger fungicide and ventilate aggressively for greenhouse bean mildew.