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Thanks that is an amino acid I believe I’ll look into it thanks
There is another simple and cheep chemical that is worth to try in combination with your Zn and brassinolide treatments. N-acetylcysteine is being tested to treat Huanglongbin in Brazil and it is rather effective against a related bacteria Xyllela fastidiosa.https://revistapesquisa.fapesp.br/en/2019/07/15/healing-citrus-groves/
Copper is not killing bacteria