Powdery Mildew-Resistant Pumpkin & Squash

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
Aladdin H
Gladiator H
Golden Condor M
Hercules H
King Midas S
Magician H
Magic Lantern H (BWS)
Merlin H (BWS)
SuperHerc H
Spartan SW

Winter Squash – Acorn
Autumn Delight R
Royal Ace H
Sweet Reba HM
Table Star R
Table Treat R
Taybelle PM R
Tip Top PMR J

Summer Squash – Yellow
Fancycrook HPS (crookneck)
Patriot II R (straightneck, TG)
Prelude II R (crookneck, TG)
Sunglo R (crookneck)
Sunray R,J, H (straightneck)
Success HM (straightneck)

Pumpkins – Medium

Charisma H
Hobbit H
Oktoberfest S
Scarecrow M
Pumpkins – Pie
Cannonball H
Harvest Princess M
Iron Man H (phyt)
Mystic Plus H
Prankster S
Pure Gold M
RockaFellow S
Touch of Autumn R, S, CW, CS

Winter Squash – Butternut
Betternut 401 S
Bugle R
Indian Brave NES
JWS 6823 PMR J
Metro PMR J
RB3106 r

Summer Squash – Zucchini
Ambassador HPS
Hurakan H (gray zucchini)
Judgment III (TG) SW
Justice II R (TG)
Lynx St
Payroll R, S, SW
Sebring (yellow zucchini) SW
Wildcat St

Pumpkins – Specialty

Bumpkin M (mini)
Gold Dust R (mini)
Hooligan (tricolor mini) CS
Gooligan (bicolor mini) CS
OneTooMany R (white/red
Sweet Lightning R (bicolor

Winter Squash – Specialty
Bush Delicata J, HPS
Celebration R (y/or acorn hybrid)
Harlequin R (gr/wht acorn hybrid)
MardiGras NES (gr/whtacorn hybrid)

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.