Quote:
Originally Posted by Gargi
Got small root nubbins on newer pseudobulbs, but they started to die, tips turned black... Eyes are also rotting.... So, today I checked for fusarium, but I am not sure if it's positive.
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I heard/read that some orchids have a purple ring naturally. So a particular observation definitely doesn't guarantee a case of 'fusarium'. And, of course, there are known cases where some youtube video people appear to have developed a case of fusarium paranoia. Normally, if good rule-of-thumb orchid growing procedures are followed ----- there's not going to be fusarium issues.
You mentioned that the media was dissicated initially. The main thing here is to then understand what happened afterward ----- eg. growing conditions that led to the rotting (after the new growth occurred).
Maybe applications of orchid systematic fungicide and bactericide applied prior to potting could/may help, and use clean media ------ like small (5 mm average diameter) scoria rock pieces ----- and good air circulation. The pseudobulbs appear to be of a size that's capable of providing energy for root growth. The main thing was to prevent rotting or more rotting.
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