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Rhizoctonia Belly Rot of Cucumbers Elaine Roddy Vegetable Crops Specialist OMAF/MRA.

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Presentation on theme: "Rhizoctonia Belly Rot of Cucumbers Elaine Roddy Vegetable Crops Specialist OMAF/MRA."— Presentation transcript:

1 Rhizoctonia Belly Rot of Cucumbers Elaine Roddy Vegetable Crops Specialist OMAF/MRA

2 Symptoms on the belly or tip

3 Further colonized by fruit fly larvae

4 Rhizoctonia Solani (Kuhn anamorph) Strain: AG 4 known to infect cucumbers Temperature Range: 46-95 F Optimum Temperature: 80 F High Humidity or Following Heavy Rainfall – Monday & Tuesdays have the highest levels Survives as dormant mycelium or sclerotia in infested crop debris

5 Pathogenicity C. Trueman, University of Guelph – Ridgetown Strains AG2-2 IIB and AG2-2 IV are commonly found in Southwestern Ontario (Sugarbeet study) Isolates belonging to all three groups were pathogenic to inoculated cucumber fruit (lab) Study used greenhouse “mini” cucumbers (persian).

6 Future Directions Soil Applied Fungicides = Very Inconsistent Pathogenicity in field conditions – Pickling cucumber varieties Hosts – Weeds – Rotational Crops Agronomic Practices – Tillage, irrigation, rotation, soil types…..

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