I belong to a number of cannabis forums and one of the biggest outdoor issues for the past 2 years has been the appearance of leaf spot disease or late blight. Outdoor cannabis crops in the NE US, the midwest, mid atlantic and southern US have been totally devestated by the disease and many outdoor growers across the eastern part of the US have concluded that if the disease cant be killed, it will end outdoor growing in the eastern US. The disease has reduced my annual yeild from about 20lbs, to 4lbs and Im desperate to find a safe fungicide.
The disease starts in late july/aug with yellowing of leaves and then quickly defoliates and kills the plant.
Im shocked that its not a big topic in this outdoor section and im wondering why? I cant find it mentioned anywhere and it is litterally the biggest outdoor growing topic im aware off. I interact with more than 20 growers around the eastern US, and everyone of our crops are being destroyed by this disease.
Have you guys found a cure?
Edited by clodhopper, 22 February 2011 - 01:20 PM.