This list is reprinted from the University of New Hampshire Cooperative Extension https://extension.unh.edu/resources/files/Resource000617_Rep639.pdf
Powdery Mildew-resistant Pumpkin & Squash Varieties
| Pumpkins – Large
18 Karat Gold R Winter Squash – Acorn Summer Squash – Yellow |
Pumpkins – Medium
Charisma H Winter Squash – Butternut Summer Squash – Zucchini |
Pumpkins – Specialty
Bumpkin M (mini) Winter Squash – Specialty |
All pumpkins and squash will develop powdery mildew symptoms if weather conditions favor the fungus. Resistant or tolerant varieties develop symptoms more slowly and maintain leaf coverage later in the season. For more information about controlling powdery mildew, see the New England Vegetable Management Guide, found online at http://www.nevegetable.org/.
All varieties should be trialed on a small scale to determine whether they are suitable for your growing conditions, and markets.
Legend of seed sources: R Rupp Seeds, M Meyer Seed International, H Harris Moran Seed Co, J Johnny’s Selected Seeds, HM High Mowing Seeds, HPS Horticultural Products & Services, N New England Seeds, SW Seedway, St Stokes, S Siegers, CS Carolina Seeds.
This information is presented as a guide only. No endorsement is implied, and sources listed are not necessarily sole sources.
Comments: Phyt – also tolerant to Phytophthora. BWS – Highly susceptible to bacterial wilt.
TG – transgenic virus resistance, not compatible with USDA Organic Certification.