UNKNOWN DISEASE 2002 SEASON WIPED OUT ALL PLANTS
A yellowing of the main vine leaves slowly spread its death through the plant. Stunting and yellowing the Leaves. Several other cases were reported around North America. Possibilities: High pH cut off Iron supply, low pH cut off food supply, soil born disease, Root Nematodes. pH came in low (6.6) at mound but high (6.8 - 7.0)in the rest of the patch.
Approach for 2003
BioGrow Endo Plus in Mound Area
Added Lime in Mound Area
To date all efforts have failed; I've temporarily retired from Pumpkin Growing to let the disease die off. Comments welcome.Below are pictures of the disease.