Fig 9 - uploaded by Andy Wyenandt
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Typical symptoms of Fusarium fruit rot of pumpkin cultivar Magic Lantern caused by F. solani f. sp cucurbitae race 1.
Source publication
From 2000 to 2002 commercial pumpkin (Cucurbita pepo) fields in Ohio were surveyed for Fusarium fruit rot. From six counties in 2000, 2001, and 2002, a total of 43 isolates from eight farms, 84 isolates from nine farms, and 40 isolates from six farms were collected, respectively. Fusarium solani f. sp. cucurbitae race 1 was the most commonly isolat...
Context in source publication
Context 1
... of F. solani f. sp. cucurbitae, were categorized as an expanding internal rot with characteristic whitish-green mycelial growth and a greenish-brown discoloration of the seed (Fig. 8). External symptoms on mature infected fruit were characterized by slightly sunken, expanding lesions bearing numerous white to tan sporodochia in centers (Fig. 9). The symptoms caused by F. solani f. sp. cucurbitae race 1 fruit rot seen in the field and in proof of pathogenicity tests on cv. Magic Lantern fruit in the laboratory are in accordance with Elmers' (4) description of two types of fruit rot developing in the field. Typical symptoms of fruit rot caused by Fusarium spp. in the field ...
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Citations
... Fusarium solani f. sp. cucurbitae race 1 was the most common species causing fruit rot of pumpkin in a survey of commercial fields in Ohio from 2000 to 2002 ( Fig. 1) (Wyenandt et al., 2010) and was also confirmed as the causal agent of fusarium foot and fruit rot outbreaks in pumpkin in Connecticut, New York, andMissouri during 2001-03 (Elmer et al., 2007). Fusarium fruit rot can be extremely destructive in small roadside farm markets where ''u-pick'' pumpkins are planted in the same field each year. ...
... Fusarium fruit rot can be extremely destructive in small roadside farm markets where ''u-pick'' pumpkins are planted in the same field each year. In some years in Ohio, yield loss was as high as 100% where pumpkin rotations are nonexistent, or every 1 or 2 years (Wyenandt et al., 2010). Using cover crop mulches in pumpkin production may play an important role in reducing soil-borne fungal diseases when proper crop rotations cannot be done. ...
In 2001 and 2002, fall- and spring-sown, spring-killed or spring-sown living cover crops mulches were evaluated for their effects on pumpkin (Cucurbita pepo) number and weight, fruit cleanliness, and fusarium fruit rot (FFR; Fusarium solani f. sp. cucurbitae race 1). In general, the number and weight of orange (mature) fruit and total fruit weight were higher in bare soil (conventional), fall- or spring-sown, spring-killed cover crop mulches compared with spring-sown, living annual medic (Medicago spp.) cover crop mulches. In both years, pumpkins grown on fall-sown winter rye (Secale cereale), hairy vetch (Vicia villosa), winter rye + hairy vetch, and spring-sown oat (Avena sativa) produced fruit numbers and weights comparable to or slightly higher than bare soil (conventional) production, suggesting that these cover crop mulches had no effects on reducing pumpkin yield. The number and weight of pumpkins grown in spring-sown, living annual medic cover crop mulches were reduced in both years compared with the other cover crop mulches. On artificially inoculated field plots, percentages of groundcover at harvest and fruit with FFR were 89% and 5% in fall-sown winter rye (seeded at 90 lb/acre), 88% and 10% in fall-sown rye (50 lb/acre), 85% and 5% in fallsown rye + hairy vetch (50 lb/acre each), 19% and 30% in fall-sown hairy vetch (50 lb/acre), 23% and 23% in spring-sown oat (110 lb/acre), 1% and 25% to 39% in spring-sown, living annual medics (40 lb/acre) and 0% and 46% in bare soil plots, respectively. Results suggest that cover cropmulches such as fall-sownwinter rye, fallsown winter rye + hairy vetch, or spring-sown, spring-killed oat killed and left on the soil surface may help reduce losses to FFR in pumpkin production.
