Yellow spots

[SouthPark]

Kollba ----- not sure at all (me that is) about what minimum concentration of hydrogen peroxide is needed for reliably disinfecting an orchid on the outside of it. I have seen online values that are much less than the 3%, but definitely do not know whether those significantly reduced concentrations can be effective.

I was thinking that they purposely make 3% solution or higher in order to effectively do disinfecting.

Anyway, for pre-treatment of my orchids against say fungus ----- such as orchids stuck in a box for a few days or more during mailing ---- I just spray mancozeb.

For scale and mealybug and boisduval scale etc ----- I just use imidacloprid (which is not nice on bees ------ but should be ok when an orchid isn't flowering .... as bees should be ok when there's no flowers).

Just the other day, I noticed that a couple of pseudobulbs that I had overlooked ----- had white stuff ..... maybe boisduval scale. Lots of it! After spraying imidacloprid on the bulbs and leaves, and even some on the roots ....... it sent whatever they were packing. They disappeared real quick after that. The effectiveness even amazed me.

[Kollba]

Originally Posted by SouthPark

Anyway, for pre-treatment of my orchids against say fungus ----- such as orchids stuck in a box for a few days or more during mailing ---- I just spray mancozeb.

For scale and mealybug and boisduval scale etc ----- I just use imidacloprid

I just checked on lazada.com (thai internet shopping) and with some help from Google Translate I found both of them.
The hardest part is to know the names of the products you need and the second hardest is to find them if their names are written in thai.
Thank you for giving me the names and telling me how you are using them !!

---------- Post added at 04:07 PM ---------- Previous post was at 03:59 PM ----------

Just for fun...
Google translate can sometimes be a bit strange. This is a part of the description for Imidacloprid translated from thai:

"It is an absorbable insecticide. Effectively eradicates both dead and eating insects by destroying the central nervous system of insects."

Must be very good since it also eradicates dead insects...