[Apple-Crop] Fireblight

[Zeng, Quan]

Step can generally last for 2-4 days without rain.  As it is degradable by sun light, it lasts longer in over cast days than in sunny days. Rain can wash some off but at least strep is more systemic than other antibiotics such as tetracycline. However, as it does not penetrate into unopened flowers, you would still need to consider putting done another application again 2 days later to make sure the newly opened flowers are protected by strep if the prediction models suggest a high disease pressure in your region.

Quan

Quan Zeng, PhD
Assistant Scientist & Bacteriologist
Department of Plant Pathology & Ecology
The Connecticut Agricultural Experiment Station
123 Huntington Street, P.O. Box 1106
New Haven, Connecticut 06504
phone: 203-974-8613

________________________________
From: apple-crop <apple-crop-bounces at virtualorchard.com> on behalf of kellyorchards <kellyorchards at gmail.com>
Sent: Sunday, May 21, 2017 12:14:15 PM
To: Apple-Crop
Subject: [Apple-Crop] Fireblight

How long will strep protect blossoms that were open at the time
of application?




Art Kelly
Kelly Orchards
Acton, Maine