Amherst Mass. possibly at U-Mass. Chem 91 x (Mass superskunk/northern lights)
A strain of cannabis originated from the Umass Amherst area, rumored to be an offshoot of the breader ChemDawg from the days of
www.overgrow.com Was quite popular amoung weed conisuers in Boston and New York in 2000. Was originally a whispy light weight strain. Soma later introduced a strain called NYCSD "New York City Sour Diesel". Claims some rasta gave it to him in NYC, how ever this strain did not originate from NYC and was most likely was other strains bred for similarity with the original, most likely shares parentage with the currently popular grapefruit strain. Because of avalabilty Soma's obviously different strain at the peak of NYCSD popularity the original from the streets of New York became known as ECSD "East Coast Sour Diesel" You can still find the original at the Grey Area coffe shop in Amsterdam. RezDawg of Resivoir seeds uses the original Sour diesel in his sour diesel strains. How ever they have been bred for more weight while keeping the potency. RezDawg's sourdiesel strains are generaly cosidered the standard now.
So how to tell the difference, Sour diesel from soma or soma breeds will be a limey sorta green where as the original was a darker almost blueish hue. This darker hue is quite evident in the strains from Rezdawg. The original smells like a diesel fuel spill at a gas station when broken up where as the Soma strain has a fruity graipfuitish smell.
COPIED FROM URBAN DICTIONARY. ^^ i know its not 100% but it helps.
basically someone had a REAL chemdawg family hybrid in Mass, that must be the "real" sour diesel. soma screwed alot of this up with his lame story. i lost all respect for him... those nycd seeds are way too expensive too. goes to show u others could really try harder with all their strains, if soma tried so hard to make a copy cat diesel and it was so popular.
i always said nycd seemed like grapefruit. my geuss is that Nevil is right about the lineage on the NYCD JH SSH etc.etc. theres a thread about it.
im not so sure that the Northern Lights/Super Skunk x Chem 91 is the real lineage on the real deal sativa heavy sour diesel. and if it is, that must have been a very sativa leaning phenotype that was selected.
either way REAL sour diesel, done right, is some of the best tasting herb ever.