Emerging Diseases of Pumpkin and Squash in North Central Region Mohammad Babadoost University of Illinois

Emerging Disease of Pumpkin and Squash ____________________________________________  Bacterial spot (Xanthomonas cucurbitae)  Anthracnose (Colletotrichum orbiculare)  Sclerotinia blight (Sclerotinia sclerotiorum) Babadoost

Major Disease of Cucurbits in 2012 __________________________________________  Bacterial spot (bacterial leaf spot)  The causal pathogen is Xanthomonas cucurbitae  Bacterial spot is an emerging, highly important disease of pumpkin and squash in Illinois and other states in the Midwest Babadoost

Bacterial Spot of Pumpkin __________________________________________  Bacterial spot (bacterial leaf spot) Babadoost

Bacterial spot (bacterial leaf spot) Babadoost

Bacterial spot on jack-o-lantern pumpkin Babadoost

Bacterial spot on processing pumpkin Babadoost

Bacterial spot on squash fruit Babadoost

Colonization of bacterial-infected fruit by other organisms Babadoost

Collapse of pumpkin fruit infected with Xanthomonas cucurbitae Babadoost

Surveys

State Fields surveyed (no) Fields with infected fruit [# (% )] Infected pumpkins (%) Illinois6557 (88%)34 Iowa84 (50%)8 Indiana77 (100%)62 Kansas55 (100%)30 Missouri63 (50%)14 Nebraska55 (100%)54 Ohio99 (100%)32 Wisconsin65 (83%)18 Bacterial Spot of Pumpkins in the Midwest, 2012 Babadoost

Emerging Diseases of Pumpkin and Squash __________________________________________  Anthracnose  Is a common disease of cucumber, muskmelon, and watermelon  It has become a frequently occurring disease on pumpkin and squash Babadoost

Anthracnose of cucurbits Babadoost

Anthracnose of pumpkin Babadoost

Emerging Diseases of Pumpkin and Squash __________________________________________  Sclerotinia blight  Is a pumpkin disease  Is a fruit and vine disease, observed late in the season Babadoost

Pumpkins with Sclerotinia sclerotiorum

Babadoost Pumpkins with Sclerotinia sclerotiorum

Babadoost Pumpkins with Sclerotinia sclerotiorum