Episode 162: Dips, Sprays, & Phytotoxicity: Mastering Oils in Cannabis Cultivation with Julie Graesch

Episode 162: Dips, Sprays, & Phytotoxicity: Mastering Oils in Cannabis Cultivation with Julie Graesch

Author: Tad Hussey April 7, 2026 Duration: 55:57
In this episode, Tad Hussey welcomes back Julie Graesch, Technical Services Manager at BioWorks, to demystify one of the most common yet misunderstood tools in a grower’s IPM toolkit: Horticultural and Essential Oils. While many growers reach for oils to "suffocate" pests, the science behind their efficacy—and the risks of phytotoxicity—is far more complex. Julie breaks down the critical differences between EPA-registered mineral oils and 25B essential oil products, explaining how different modes of action like desiccation, paralysis, and behavioral repellency work together to bypass pest resistance. They also dive into the "why" behind professional formulations, discussing how emulsifiers and surfactants make the difference between a clean kill and a scorched crop.

Tad Hussey, founder of KIS Organics, hosts the Cannabis Cultivation and Science Podcast, a deep and practical resource for anyone serious about growing plants organically. Rather than offering quick tips, Tad builds each conversation on a foundation of verifiable science, breaking down complex soil biology, plant physiology, and sustainable methods into understandable segments. He regularly brings in leading researchers, agronomists, and seasoned cultivators, creating a unique space where academic knowledge meets real-world, hands-on experience. You'll hear detailed discussions on everything from microbial inoculants and nutrient cycling to the nuances of light spectra and water quality, all through the lens of organic stewardship. This podcast is for gardeners, hobbyists, and professionals who are curious about the "why" behind their practices and want to move beyond conventional growing advice. It’s a thoughtful exploration of how to work with natural systems to cultivate healthier plants, focusing on foundational principles that apply broadly while delving specifically into cannabis cultivation. The dialogue is always evidence-based, cutting through industry trends to examine what truly works, making it an essential listen for those who believe that the best cultivation starts with understanding the science in the soil.
Author: Language: English Episodes: 100

Cannabis Cultivation and Science Podcast
Podcast Episodes
Episode 161: The Secret Lives of Pathogens with Dr. Zamir Punja [not-audio_url] [/not-audio_url]

Duration: 1:10:31
In this episode, Tad Hussey sits down with the "Godfather of Cannabis Pathology," Dr. Zamir Punja, Professor of Plant Pathology and Biotechnology at Simon Fraser University. Dr. Punja shares groundbreaking research from…