Fungus
Fungus is another problem when you are in flowering, because they are
susceptible to a fungus or bud rot. Growing conditions for fungus are best when
temps are between 60 and 80 degrees and the humidity is high. The fungus is
very destructive and spreads quickly. These kinds of fungus are air borne and
can travel to other bud sites. If you already have been infected by them the best
thing you can do is cut off and remove the infected area and then discard out of
the grow area, then get a hold of some anti-fungal spray and apply.

Fungi can kill your crop quick, so invest in some SAFE fungicide and spray down
the plants as much as you can and as soon as you can. The faster the safer. If
you have had problems with fungus before, do NOT spray them you will
contribute to the fungus becoming resistant to the spray/chemicals you are using.
Try to keep the humidity down to the range fungus do not grow to well in. Keep a
good amount of ventilation around your grow, and if you have plants outside,
always keep them quarantined away youâ??re your indoor plants until you know
they are safe.

Most fungicides are very nasty and eating them can be very dangerous so itâ??s
best to use something on them that is safe on plants that you can eat, safer
makes a very safe product that can be found in most stores and hydro shops. It
contains only sulfur in solution. Here is a picture of what bud rot looks like when it
starts to form.

Control
To control to prevent fungus from forming there are a few things you should do. DO NOT foliar feed at night, tends to make humidity higher rather than when you water in the day the water has time to evaporate where at night will linger in the air.
Same goes for watering plants at night, wait till the morning or afternoon to water! Keep a happy plant and will not become prone to infections. Checking plants often can aid in getting rid of any fungus that may attack other leaves and or bud! Have a lot of air going around the plants for bad ventilation= sick plants and a breeding ground for spores! Keep leaves away from soil making sure they do NOT touch the soil.
Keep cooler temps at night while plants are on there down time. If you have already gotten some kind of fungus there are things you can use:
neem2, neem oil works wonders!! Potassium Bicarbonate, Baking soda and for
other chemical agents you can use Plant Shield, Serenade and pythium! There
are many other chemicals and organics that work but these are the most popular and they work very well


here is a good article I found online. I have a couple of books that reinforce everything he says so I trust the source. Personally, I use a product called Serenade. It contains a strain of Bacteria that attacks the mold, and powedery mildew. If used as a preventative measure, it can be very effective(or so i am told)


Hope its helpful. :jointsmile::thumbsup:
-http://www.scribd.com/doc/18053976/2005-marijuana-garden-saver-plant-troubleshooting-mynamestitch