Query on the use of drugs in Guolan

Flipping through orchid magazines and other flower magazines, sometimes you will read some confusing articles. The summary and questions are as follows:

First, it is said that penicillin is the strongest bactericidal antibiotic, which has excellent effect on orchid black spot, anthracnose and white silk disease.

Second, it is said that penicillin, gentamicin and streptomycin are effective in the prevention and control of anthracnose, white silk disease and root rot.

The pathogenic microorganisms of the above diseases are fungi, and their specific names are introduced in all kinds of books and periodicals, but they are bacteria that are "killed" by green, chain and gentamicin, and they are only effective against some of the species of bacteria. They are not the most effective antibiotics. Moreover, after decades and hundreds of years of application, a large number of drug-resistant strains have been produced in the original effective bacterial species. As for their efficacy against fungi, all kinds of medical textbooks and reference books clearly point out that fungi are resistant to penicillin (that is, ineffective). Fungi are resistant to gentamicin and streptomycin. The essence of this problem is that it is the same bacteria, but this fungus is not the other bacteria. Fungi and bacteria are different kinds of microorganisms, have different biological characteristics, and have very different sensitivity to various chemical drugs. But is it an accidental coincidence that both of the above two articles claim to be effective?

Third, it is said that Piyanping smear disease spot has a special effect on anthrax.

Compared with the former two, this is a big misunderstanding. The main active ingredient of Piyanping is dexamethasone acetate, which belongs to corticosteroids, which have no inhibitory effect on fungi or bacteria. On the contrary, there are many cases of fungal infection caused by long-term use of corticosteroids in clinical practice. Is this the result of being used in people, and miracles can occur in orchids? unimaginable!

Xu Qinzhong