As everyone is getting ready for spring, growers are busy receiving and sticking cuttings.
As cuttings come in make sure to set up a quarantine area to keep incoming plant material separate from other plants.
Upon arrival, open boxes immediately and inspect the cuttings for signs of insects, diseases or physical damage. Check for signs of wilting, stress, damage or death. If problems are found, such as yellow leaves, wilting or damage, take photos and contact the supplier immediately with photos, a detailed description, and order information. Suppliers want to know about any issues with the cuttings as soon as possible.
Before sticking, cuttings can be dipped in registered biopesticides. Dipping helps to keep insect populations in check, and can be an important step in reducing pest issues later in the season. Dipping cuttings also helps to reduce the overall volume of pest control products used throughout the season.
Dips are compatible with biocontrol agents used in a biocontrol program. Common biopesticides used for dipping include BotaniGard® WP (Beauveria bassiana), RootShield® WP (Trichoderma) and NemaShield® (beneficial nematodes). Products can be mixed, or used individually. For example, BotaniGard® WP can be combined with RootShield® WP and NemaShield® to provide a more effective dip. Refer to product labels for complete application details and always read and follow label directions.
Before preparing a dip solution, be sure to clean and disinfect the dipping tank and equipment. Prepare fresh solution daily because the biopesticide spores and nematodes will not survive overnight. Using fresh dip solution regularly also helps to prevent the buildup of pathogens. Research on dipping cuttings has shown that the transmission of pathogens to healthy cuttings from properly prepared solution is highly unlikely. After dipping cuttings, place them on an inclining table to allow excess dip solution to drain. Allow the cuttings to dry immediately before sticking.
- Geoffrey Njue, Extension Specialist, UMass Extension Greenhouse Crops and Floriculture Program