1、Optimal Timing for Spraying Brassinosteroids on Crops

Spraying at this stage effectively boosts crop yield. During peak growth periods (e.g., hot summers), spraying also enhances drought tolerance and disease resistance.

2、The Duration of Application for Brassinosteroids During Flowering

Spraying during the flowering period aids bud formation and development, leading to better-quality fruits. Pre-Harvest Spraying: Applying brassinosteroids before harvest accelerates fruit ripening and enhances quality.

3、油菜素内酯调控植物生长发育的研究进展

本文综述了近年来有关BR对植物营养生长和生殖生长的调控、增强植物抗逆性以及BR调控的分子机制等领域的研究进展，探讨目前关于BR研究中仍存在的问题，并对今后BR的研究方向进行讨论与展望。 As a new plant hormone, brassinolide (BR) has been widely used in agriculture and forestry due to its advantages of high efficiency, environmental protection and wide spectrum.

4、Practical applications of brassinosteroids in horticulture—Some field

Brassinosteroids (BS) are a class of steroidal plant hormones which are highly stable and environment friendly. They are involved in a wide range of physiological and biochemical responses in plants. Their role in the increase in productivity of agricultural and oil seed crops is well established.

Brassinosteroids Application Responses in Fruit Crops

Research findings on influences of exogenous BRs application on various aspects of growth and development like vegetative growth, flowering, fruit set, fruit growth, ripening, storage, and...

Designed Manipulation of the Brassinosteroid Signal to Enhance Crop

Effective manipulation of the BR signal and avoidance of side effects are required to enhance yield in different crops. Application of BR by spraying at specific developmental stages can enhance crop yield, but this method is impractical for use on a large scale.

Brassinosteroids Application in Ornamental Crops: A Review

Both early and late C-6 pathways are known to operate in several plants including Arabidopsis, Catharanthus roseus, etc. But in plants like tomato, the late C-6 oxidation pathway may be the major pathway leading to active BR production [11].

Brassinosteroids: The Promising Plant Growth Regulators in

However, more accurate studies on dosage, mode and time of application, fit brassinosteroid suitability for the plant or cultivar, and association with other phytohormones are needed. BS increase crop yield and show anti-stress effects on several plants at very low doses.

Optimal Daily Application Frequency of Brassinosteroid

Foliar Spraying: Dilute brassinosteroid and directly spray it onto plant leaves to enhance absorption. Root Application: Dilute brassinosteroid and apply it directly to the plant roots to stimulate root growth.

Which Brassinosteroid is Best for Roses?

Choosing the right brassinosteroid is key to improving rose growth quality and yield. By understanding their mechanisms, selecting appropriate types, controlling application methods, and coordinating with other regulators, you can create a healthier, more vigorous environment for roses.

Brassinosteroid is a plant growth regulator widely used in agricultural production, significantly enhancing crop yield and quality. As an ornamental flower, roses require careful timing and methods when applying brassinosteroid. Below are detailed recommendations for spraying brassinosteroid on roses:

I. Optimal Timing for Spraying Brassinosteroid on Roses

1. Spring: Spring is a critical period for plant growth. Spraying brassinosteroid during early or late spring, when temperatures rise and soil moisture and nutrients become abundant, accelerates growth and strengthens stress resistance.
2. Summer: During the peak growing season in summer, brassinosteroid helps prevent pests and diseases by boosting disease resistance. In hot, humid conditions, it safeguards roses against infections and pest infestations.
3. Autumn: As growth slows in autumn, brassinosteroid promotes flower bud differentiation and improves bloom quality. It ensures adequate nutrient accumulation before winter, preparing roses for robust flowering the next year.
4. Winter: In the dormant period, brassinosteroid stimulates root development and enhances cold resistance. It supports healthy root growth, enabling roses to withstand harsh winter conditions.

II. Application Methods for Spraying Brassinosteroid on Roses

1. Select High-Quality Products: Choose brassinosteroid products with high purity, strong activity, and proven safety. Adjust concentration and application based on growth stages and pest risks.
2. Dilution Ratio: Follow product instructions or consult experts to determine the appropriate dilution ratio. Avoid over-concentration to prevent damage.
3. Uniform Spraying: Apply evenly to leaves, stems, and flowers, avoiding missed or overlapping areas. Skip spraying during strong sunlight or windy conditions.
4. Safety Precautions: Wear masks, gloves, and protective clothing. Do not mix brassinosteroid with alkaline substances to avoid adverse reactions.

III. Evaluating the Effects of Brassinosteroid on Roses

1. Growth Observation: Monitor for accelerated growth, lush foliage, and fuller blooms, indicating effective application.
2. Pest and Disease Inspection: Check leaves, stems, and flowers for signs of pests or diseases. Reduced incidence suggests successful prevention.
3. Flowering Impact: Assess changes in flowering time. Ideally, brassinosteroid should advance or extend bloom periods without compromising quality.

IV. Key Considerations

1. Avoid Overapplication: Excessive use may harm plants. Stick to recommended dosages and frequencies.
2. Environmental Factors: Adjust timing based on weather. Avoid spraying during extreme heat, drought, or heavy rain.
3. Follow Instructions: Carefully read product labels and guidelines. Seek expert advice if uncertain.

spraying brassinosteroid on roses effectively promotes growth and protects against pests. By choosing optimal timing, methods, and doses, and adhering to product guidelines, roses can thrive healthily, delivering vibrant floral displays.

Note: This translation maintains technical accuracy while adapting terminology for English-speaking audiences. Adjustments were made to ensure clarity and natural flow in scientific contexts.