PLANT HEALTH PRODUCT SPOTLIGHT under low levels of soluble silicon in the growing medium. * A protective spray program may be warranted but thorough spray coverage before powdery mildew is present is essential. Contact your state department of agriculture or land-grant university personnel for recommended fungicides that are legal to apply in your region. * Bicarbonates such as Kaligreen, MilStop SP can be very effective when used on regular intervals prior to onset of disease. Some formulations are OMRI listed. Studies by the University of Tennessee showed good efficacy when bicarbonate was applied at weekly intervals on greenhouse grown hemp. * Oils including Bonide BonNeem II, Mildew Cure, Monterey Horticultural Oil, Omni Supreme Spray, etc., can help to control powdery mildew. Do not spray if the temperature is below 50 or above 90° F or when plants are wet or under heat/moisture stress. Some formulations are OMRI listed. * Regalia can offer reasonable control of powdery mildew as shown by field and greenhouse studies conducted by the University of Tennessee. OMRI listed. * Sulfur formulations can be very effective at controlling powdery mildew; using it above 85° F is not recommended. A greenhouse study by the University of Tennessee showed good efficacy with sulfur applied on seven-day intervals. HPN C.M. Ocamb is a plant pathology Extension specialist at Oregon State University. She can be reached at ocambc@ oregonstate.edu. POWDER MYCORRHIZAL INOCULANT MycoApply Injector Endo is a concentrated powder mycorrhizal inoculant on a soluble humic carrier. This OMRI listed formulation is ideal for organic hemp production and can be applied in a variety of efficient and effective methods. It is available in 100-gram bags from distributors nationwide. Mycorrhizal Applications www.mycorrhizae.com 541.476.3985 Circle 303 16 | 2023 GUIDE TO HEMP PRODUCTION LETTUCE RAFT This soilless hydroponic system is ideally suited for deep water culture. Sealed surface technology resists water penetration. Ensures durability and longevity. Gives growers a cost-effective growing system. Beaver Plastics www.bpgrower.com 780.962.4433 Circle 304 GERMINATION MIX Lambert LM-19 is blended with fine peat moss and coarse perlite. Formulated to promote effective and uniform seed germination for growers working with larger trays. Perlite contributes to germination by increasing air space and drainage. OMRI Listed for organic use available. Lambert Peat Moss www.lambertpeatmoss.com 800.463.4083 Circle 301 REFLECTIVE GROUND COVER Reflective White/Black Ground Cover is a 3.8-ounce, UV-stabilized polypropylene fabric. Reflective white fabric on top increases yields by allowing the lower canopy of plants to receive light exposure. Black fabric underneath blocks sunlight from reaching weeds. The ground cover is permeable, allowing water and nutrients to pass through. DeWitt Company www.dewittcompany.com 800.888.9669 Circle 302http://www.dewittcompany.com http://www.lambertpeatmoss.com http://www.mycorrhizae.com http://www.bpgrower.com