Botrytis - Promoted by flowers dropping from hanging baskets

Botrytis - Promoted by flowers dropping from hanging baskets

Botrytis cinera causes leaf blight, bulb rot, fruit rot, crown rot,and stem canker on a wide variety of plants. The pathogen is ubiquitous in the environment and attacks injured or senescent plant tissue. Botrytis can be controlled by management of environmental conditions, sound cultural practices, and fungicide applications. Control weeds and remove plant debris. Space plants to allow good air circulation, reduce humidity within the canopy, and minimize leaf wetness. Improve horizontal air flow with fans. Reduce humidity by a combination of heating and venting in the evening, particularly when warm days are followed by cool nights Water in the morning if practical. Fungicides appropriate for Botrytis include 26 GT, 26/36, Compass, Cleary's 3336, Botran, Decree, Daconil, Dithane, Heritage, Exotherm Termil, Sextant, Protect DF, and Medallion. Check label for host appropriateness. Resistance to Cleary's 3336, 26 GT, and Sextant has been reported in Botrytis populations. Always alternate fungicide applications between materials with different modes of action to prevent resistance development.

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