This versatile Mepiquat chloride product, suitable for both field crops and fruits/vegetables, is a highly adaptable plant growth regulator. It effectively inhibits excessive vegetative growth and promotes a compact plant structure, ultimately enhancing quality and yield, all while maintaining a mild profile and high safety standards.
I. Core Mechanism of Action
Inhibits excessive growth: Blocks endogenous gibberellin synthesis, slows down excessive cell elongation, prevents unproductive stem and leaf overgrowth, and reduces the wasteful consumption of nutrients.
Shapes compact plant structure: Shortens internode length, resulting in a more compact plant habit; improves airflow and light penetration within the field, thereby lowering the risk of disease.
Targeted quality and yield enhancement: Redirects nutrients—originally destined for vegetative growth—toward flowers, fruits, and root systems. This boosts fruit set rates, fruit uniformity, and grain weight (e.g., 1000-grain weight) while enhancing the accumulation of internal compounds such as sugars and proteins.
II. Application Scenarios
Field crops: Apply during the 6–9 leaf stage for corn; early-to-peak flowering stages for peanuts; early flowering stage for soybeans; and jointing stage for wheat. This controls excessive growth, prevents lodging, and promotes the development of plump pods and grains.
Fruits and vegetables: Apply to vegetables (e.g., tomatoes, cucumbers, peppers) during the early stages of vigorous growth. For fruit trees (e.g., citrus, apples, peaches), apply during the rapid shoot growth phase and the fruit expansion phase following fruit set. This controls shoot growth, promotes flowering, and reduces flower and fruit drop.
III. Application Guidelines
Concentration control: Dilute 800–1200 times for crops at the seedling stage; 500–800 times for fruits and vegetables at peak flowering; and 600–1000 times for field crops at the jointing stage. Use the "secondary dilution" method and prepare the solution immediately before use. **Timing of Mepiquat Chloride Application:** Spray on sunny days—either before 9:00 AM or after 4:00 PM—to avoid periods of intense sunlight and high temperatures. Limit application to no more than three times per growth cycle, with an interval of at least 15 days between applications.
Synergistic Combinations: It can be mixed with micronutrient fertilizers, such as zinc and boron, to replenish nutrients consumed during the process of controlling excessive vegetative growth, thereby further enhancing yield and quality.
