1. Avoid contact of crops with natural growth inhibitors, such as abscisic acid, cinnamic acid, coumarin, salicylic acid and chlorogenic acid.

Second, don't use drugs such as triiodobenzoic acid and plastics.

Third, if crops are exposed to growth inhibitors, measures should be taken to dilute, degrade and eliminate the growth inhibitors to minimize the impact on crops.

Fourth, give crops a good growth environment.