Anthracnose on Maple Leaves
Image by Teresa Golden

Pests and Pathogens (Part 2) about anthracnose, powdery mildew and houseplant problems

Episode 121: Pests & Pathogens Retrospective (Part 2)

In Part 2 of this Pests and Pathogens Retrospective episode, common issues such as houseplant problems, anthracnose and powdery mildew are discussed. These are three short segments that were previously aired, but we’ve repackage them to easier listening.

Dede Terns-Thorpe and Jackie Hayden, Master Gardener Volunteers from Cornell Cooperative Extension of Columbia and Greene Counties, are back on Nature Calls: Conversations from the Hudson Valley to let you know what to look for and what you can do about it.

We start with Anthracnose diseases which are caused by fungi that infect stems, branches, leaves and fruits of a wide variety of deciduous trees and shrubs as well as garden vegetables. Sycamore, ash, maple, oak and privet are especially susceptible in New York. The symptoms of these diseases are more severe in years of extended cool, wet spring weather.

If you notice bugs around your houseplants, first isolate the plant and then identify the pest. Early infestations might be removed by hand picking, scraping with a fingernail or addressed using a cotton swab dipped in rubbing alcohol. Spraying a sturdy plant with water or an insecticidal soap will often remove many pests. In this segment, learn about common houseplant pests (e.g. aphids, mites, scales, mealy bugs, thrips, leaf miners, etc.) and the best ways to control them.

Several different genera of fungi cause powdery mildew which looks like white powdery spores growing on the upper leaf surface of the lower leaves of a plant. Hear Dede and Jackie talk about this common summer pathogen by answering questions such as “What is powdery mildew?” “How do I manage a powdery mildew infestation?” or “What are best practices to minimize the odds of a reoccurrence of powdery mildew?” There’s lots to learn about managing this common pathogen.

Hosts: Jean Thomas

Guests: Dede Terns-Thorpe and Jackie Hayden

Photo by: Teresa Golden

Production Support: Linda Aydlett, Deven Connelly, Teresa Golden, Xandra Powers, Annie Scibienski



Xandra Powers
Community Horticulture Coordinator
518-828-3346 x106

Last updated May 30, 2024