Quote:
Originally Posted by CR7cristiano
Interesting....Well this is what I am told from One of the largest orchid nurseries in Thailand.... Idk to be honest.
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Perhaps whoever told you that was mad at you.
The statement below is typical of the advice I have seen:
http://www.staugorchidsociety.org/PDF/Johnson-Mites.pdf
(emphasis added is mine)
"Probably the most popular home remedy is to spray plants with a mixture of isopropyl (rubbing) alcohol and liquid mild dish detergent, such as Ivory.
Do not use other alcohols, such as ethanol or methanol, as these will penetrate the plant tissues and cause considerable damage! The concentration of the isopropyl seems to make little difference, the common 70% concentration available in stores is satisfactory. Alcohol treatment is effective against all the life stages of mites, except eggs."