Skip to Left navigation Skip to Main content Skip to Footer

University of Minnesota Extension

Extension > Garden > Diagnose a problem > What's wrong with my plant? > Vegetable > Winter Squash and Pumpkins > Fuzzy growth on fruit

Print Icon Email Icon Share Icon

Winter Squash and Pumpkins > Fruit > Fuzzy growth on fruit

1 of 4
  • Image: Anthracnose 1
  • Image: Anthracnose 2
  • Image: Anthracnose 2

Colletotrichum obriculare

  • Circular sunken dark spots on fruit up to ½” across
  • Salmon colored spores form in the center of fruit spots when wet
  • Irregular brown leaf spots
  • Commonly appears mid to late season
  • More information on Anthracnose
2 of 4
  • Image: White Mold 1
  • Image: White Mold 2
  • Image: White Mold 3

White Mold
Sclerotinia sclerotiorum

  • White cottony mold on squash
  • Small hard, black raisin like fungal structures embedded in cottony mold
  • Fruit becomes rotted and watery
  • Most common on pumpkin and some winter squash
  • More information on White Mold
3 of 4
  • Image: Phytophthora Blight 1
  • Image: Phytophthora Blight 2
  • Image: Phytophthora Blight 3

Phytophthora Blight
Phytophthora capsici

  • Infected fruit are covered with white fungal growth
  • Infected fruit are soft, easily punctured and often collapse
  • Fruit develop soft, water-soaked lesions which expand to large sections of the fruit
  • Large irregular brown spots on leaves
  • Stem and leaf petiole lesions are light to dark brown, water soaked and irregular
  • The entire plant may collapse if root and crown rot occurs
  • More information on Phytophthora Blight
4 of 4
  • Image: Choanephora Rot 1
  • Image: Choanephora Rot 2
  • Image: Choanephora Rot 3

Choanephora Rot
Choanephora cucurbitarum

  • Blossom end of squash is soft, rotted and covered in fluffy purplish black fungal growth
  • Flowers are covered with first white then purplish black fungal growth
  • Occurs after wet weather
  • Most common in squash
  • More information on Choanephora Rot

Don't see what you're looking for?