The swelling agent can promote fruit growth, early maturity and increase yield. However, if excessive or improper use, it will cause fruit deformity, fruit cracking, fruit drop and other harmful phenomena. At present, there is no scientific evidence to prove that expansion agent will do harm to human health.

In fact, as a plant growth regulator, bulking agent is called Clopidogrel (CPPU), which can double the secretion of cytokinin by plant cells, increase the number of cell divisions per unit time, and promote the secretion of auxin to make cells grow bigger.

Clopidogrel is a pesticide registered and approved by the Ministry of Agriculture, which can be applied to cucumber, grape, kiwi fruit, melon, watermelon and other crops. The maximum residue limit is between 0.05 mg/kg and 0.1mg/kg. Brassinolide, a special registered plant growth regulator for strawberries, is a new type of plant endogenous hormone, which can promote crop growth and increase crop yield.

Strawberries with excessive hormones are difficult to judge from color, fruit shape and size. Generally, it is necessary to rely on professional instruments to carry out complex tests to confirm whether hormones are used. But it can still be distinguished by some small methods. For example, if you buy strawberries, you can smell them first. Fresh and good strawberries have a unique fragrance, while strawberries with excessive hormones have a light fragrance and a slightly pungent smell.