Bonzi Plant Growth Regulator is a concentrated chemical formulation used to control and regulate the vegetative growth of ornamental plants in commercial nursery and greenhouse production. The active ingredient is paclobutrazol, a systemic compound that inhibits gibberellin biosynthesis to produce compact, sturdy plants.
Product Configuration and Specifications
The product is defined by its active ingredient concentration, formulation type, and commercial packaging. The active ingredient is paclobutrazol. It is formulated as a liquid suspension concentrate. The standard commercial unit is a 2.5-gallon container. These containers are packaged 2 per case, with 72 cases (144 containers) comprising a standard pallet.
Functional Mechanism and Design
Paclobutrazol is absorbed primarily through plant stems and roots and is translocated upward via the xylem. It acts by inhibiting the biosynthesis of gibberellic acid (GA1), a primary plant hormone responsible for cell elongation. This inhibition leads to a rapid reduction in internode elongation, typically visible within 3 to 5 days of application, resulting in more compact growth, thicker stems, and improved root development.
Target Applications and Performance
The regulator is used on a wide range of ornamental crops including poinsettias, petunias, and various perennials to control excessive vertical growth. Performance outcomes include uniform plant height, improved proportion and density, enhanced shipping durability, and extended shelf life. Application can reduce vertical growth by up to 75% for a period of up to four weeks, allowing growers to time production for specific markets.
Application Specifications and Protocol
The product is applied as a foliar spray or as a soil drench. The application method and rate are crop-specific and must be calibrated to achieve the desired growth control without causing over-regulation or phytotoxicity.
Standard Application Protocol:
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Drench Application: This method typically requires a lower use rate per plant and provides longer-lasting control. It is applied directly to the growing medium.
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Spray Application: Used for quicker correction or on specific crops. Foliar coverage must be thorough but not to the point of runoff.
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Timing: Applications are made during active vegetative growth, often based on plant development stage rather than calendar date.
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Mixing: The product should be agitated in the spray tank to maintain suspension. It is not typically mixed with other products.
Handling and Safety
The concentrated formulation requires careful handling. Applicators should wear appropriate personal protective equipment including long sleeves, long pants, chemical-resistant gloves, and eye protection. Avoid contact with skin, eyes, and clothing. Do not apply to plants intended for food or feed crops. Store in a secure, dry location away from foodstuffs and out of reach of children.
