Q.How To Sterilize A Fruit Tree
You mention on your article, (You must spray when the flowers have just formed but before fruits begin to take shape.) What exactly do you spray on the flowers of a lemon tree to sterilize? Sal
Certified GKH Gardening Expert
Chemicals that you can obtain, as a civilian, but should not be able to because of extraordinary concerns to the environment and yourself. Please seek the help of your nearest extension service, as they should have people there that are trained to handle such dangerous hormones.
However, should you still want to take on the health and legal risks that come with using the chemicals, the names of them are in the very last paragraph on the article that you read.
This article will help you with plant hormone information: