This update highlights significant challenges in plant pathology and horticulture, focusing on diseases like Phytophthora, leaf spot, vascular streak dieback, and boxwood blight. Dr. Jean Williams-Woodward emphasizes the need for accurate disease identification and effective fungicide application to manage these issues. Dr. Mark Czarnota addresses common herbicide damage, particularly from glyphosate and dicamba, and stresses the importance of proper application techniques to avoid legal repercussions. Additionally, the team touches on the spotted lanternfly, an invasive pest that, while not currently in Georgia, is a concern for future monitoring. Effective management of these plant health issues requires a combination of accurate diagnosis, targeted treatments, and preventive measures.
00:00 Introduction and Speakers Introduction
00:18 Overview of Current Disease Problems
00:37 Phytophthora and Leaf Spot Diseases
02:12 Vascular Streak Dieback Investigation
07:04 Boxwood Blight Updates
20:29 Herbicide Damage and Management
37:54 Spotted Lanternfly Alert
43:21 Conclusion and Final Remarks
Frequently Asked Questions (FAQs) and Answers:
Q1: What are the main diseases affecting ornamental plants?
• A: Phytophthora, leaf spot diseases, vascular streak dieback, and boxwood blight are key diseases.Q2: How can boxwood blight be managed effectively?
• A: Use fungicides like chlorothalonil and triazoles on a 7 to 14-day interval and ensure proper hygiene to prevent the spread.Q3: What causes herbicide damage in ornamental plants?
• A: Herbicide damage can result from improper application, tank contamination, or using the wrong herbicides, with glyphosate and dicamba being common culprits.Q4: What is vascular streak dieback, and why is it difficult to manage?
• A: Vascular streak dieback is a disease with symptoms like leaf scorching and dieback, caused by Rhizoctonia theobromi, and it’s challenging to manage due to difficulties in culturing the pathogen.Q5: What is the spotted lanternfly, and why is it a concern?
• A: The spotted lanternfly is an invasive pest that affects various plants, including grapes and maples. It is not yet in Georgia but poses a potential threat.