@Jorge ,
First up I would like to Welcome you to I L G M. The lounge is an awsome place where we all get to know each other better anyway here it is. I poisted a pic to show you why I believe its…
First, you must keep the air flowing. Botrytis Cinerea loves stagnant, moist air. It is what it thrives on. To make its environment as unfriendly as possible, lower your humidity below 45% and keep air flow moving. You can do this with oscillating fans, intake and exhaust systems, and even dehumidifiers.
Secondly, preventatively spray your garden. While some growers believe the myth that getting water on your buds causes bud rot, that is certainly not the case. You cannot get bud rot without the Botrytis Cinerea being present. Preventatively spraying your plants with a solution that kills the Botrytis Cinerea fungus in a natural and organic method is the way to go about doing it without fear of hurting your plants.
Some growers have reported success using a 1:10 ration of Milk/Water in a foliar application. I do not recommend this for anything other than ornamental plants, as sprayed milk might produce bacteria. There is very little data on this to be found it seems. Instead, a better and even more organic method is available which kills the Botrytis Cinerea spores by lowering the PH, rather than using a poison or fungicide. Simply mix 1 TBS of Baking Soda (Sodium Bicarbonate), and 3-5 drops of an organic dish soap (used as a spreading agent), mixed with 1 gallon of room temperature water.
Spray the solution on your plants up to week 5 in flower to kill any Botrytis Cinerea spores that may be resting on the plant waiting for water. Spray once a week or as needed, but make sure that your airflow is good as to not allow standing water to rest inside of flowers. This spray also works very well for Powdery Mildew treatments as well!
So while there isn’t much we can do to stop the wineries from spreading the Botrytis Cinerea fungus, we can certainly do our not help spread it around and let it affect our lives and the marijuana plants.
Hope this helps
Will