Here's an extract from Ed Rosenthal's "Marijuana Grower's Handbook"
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MOLD

Dense buds are sometimes attacked by molds. These fast-growing, non-green plants grow from spores which float in the air. They start to grow when they come in contact with a conducive environment: high humidity, low light and temperatures in the 60's. These conditions are most likely to occur outdoors or ina greenhouse during harvest season, when the temperatures are lower than during the summer and when there is less light and higher humidity from the dense foliage. Any moisture or wetness is easily trapped in the buds and the molds grow quickly, turning and beautiful bug into a mush or slime overnight.

Indoors, molds also occur during harvest season, usually due to low light conditions and too high a humidity.

There are several things that can be done to prevent molds, and to limit the damage that they do. Molds are much less likely to grow when the temperature is above their ideal conditions. By keeping the space in the high 70's, their growth may be prevented. Since the spores float in the air, they can be precipitated using a negative ion generator. This means that there are fewer agents to create infections. Lowering the humidity by using a dehumidifier or air vent stops the growth.
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It's a very handy book, should try pick up a copy. . . .

Here's a link if ya wana have a read... >>> http://www.cbc-canada.com/grow/handbook.html

Hope your grow works out oK. . . . :smokin:

Peace. . . . :thumbsup: