​Dry Bean Fungicide Trial

Trial ID: 2025-DBF05 – R.M. of Rhineland

Objective: Quantify the agronomic and economic impacts of a single foliar fungicide application in dry beans.

Summary: White mould was prevalent throughout the trial, at medium severity. Incidence (% of plants infected) and severity (0–5 scale) ratings were similar between treatments 30 days after application, at R6. Yield of dry beans with a single application of Proline® GOLD was significantly greater than yield of untreated dry beans. Profit/ac increased as a result.

  • Treatment: Proline® GOLD
  • Application: Timing R1
  • Application Date: July 21
  • Application Rate: 0.306 L/ac (32 ac/jug)
  • Application Method: Broadcast
  • Soil Texture: Clay Loam
  • Previous Crop Oats
  • Seeding Date: May 27
  • Variety: Pinto Bean Vibrant
  • Seeding Rate: 85,000 seeds/ac
  • Row Spacing: 30 in.
  • Plant Stand @ R6: 64,000 plants/ac
  • Harvest Date: September 25

Precipitation (mm)

Trial Information
May June July Aug Total
Rainfall 56.7 29.3 82.6 44.2 212.8
Normal 63.5 90.92 69.59 61.76 285.82
% Norm 89% 32% 119% 72% 74%

Summary of Disease Ratings Ɨ @ R6

Ɨ Incidence = percent of plants infected; Severity = Average rating on a 0–5 scale where 0 = no apparent symptoms and 5 = death of plants caused by massive mycelial growth
Bacterial Blight White Mould
Incidence Incidence Severity
Untreated 100% 97% A 2.6 A
Proline® GOLD 93% 93% A 2.8 A

Field NDVI Image July 17

Field NDVI Image July 17

Yield by Treatment

Yield by Treatment

Overall Yield & Economics

Ɨ Represents product cost only, does not include application cost Ɨ Ɨ Change in profit was calculated assuming a black bean sell price of $0.32/lb. Proft is the difference between the cost of product and the increased profit of the increased yield.
Mean (lbs/ac) Cost Ɨ Change in Profit Ɨ Ɨ
Proline® GOLD 2641 A $25/ac +$155.16/ac
Untreated 2078 B    
Yield Difference 563    
P-Value 0.0182    
CV 14.7%    
Significance Yes Economic Yes

Field Observations

Field Observations

Above left and right: Patches of dry beans with severe white mould infections within the trial area was observed at the time of the disease rating on August 21, at R6 stage.