The difference between 24-epibrassinolide and 28-homobrassinolide

There are differences between 24-epibrassinolide and 28-homobrassinolide in terms of activity, effectiveness and suitability for drip irrigation.
Difference in activity: 24-epibrassinolide is 97% active, while 28-homobrassinolide is 87% active. This indicates that 24-epibrassinolide has higher activity among chemically synthesized brassinolides.

Usage effect: 
24-epibrassinolide usually performs better on crops than 28-homobrassinolide due to its high activity. The physiological activity of 28-homobrassinolide is low and its performance may not be obvious in many crops.

Drip irrigation suitability:
While both 24-epibrassinolide and 28-homobrassinolide can be used for drip irrigation, suitability depends on the needs of the crop and growing conditions. Theoretically, since they are collectively called brassinolide and have different chemical structures and different physiological activities on crops, their suitability for drip irrigation may vary from crop to crop.

In summary, the choice between 24-epibrassinolide and 28-homobrassinolide depends on the specific needs of the crop and the expected physiological effects. If higher activity is pursued, 24-epibrassinolide may be a better choice; while if cost or specific crop needs are considered, 28-homobrassinolide may be more suitable.