Oakes Irrigation Research
Site
Carrington Research Extension Center * North Dakota State University
P.O. Box 531, Oakes, ND 58474-0531, Voice: (701) 742-2189, FAX: (701)
742-2700, email: rgreenla@ndsuext.nodak.edu
CALCIUM USED ALONE AND IN COMBINATION WITH TOPSIN
TO REDUCE WHITE MOLD IN DRY BEAN, 2001
Pat Gross and Luis del Rio, NDSU Plant Pathology Department
See “WHITE MOLD CONTROL IN EDIBLE BEAN, 2001 STUDIES” for a description of materials and methods.
Table 46. White mold incidence and severity, and dry bean yield
Table 45. Treatments in the calcium for white mold control in dry bean study at Oakes, ND, 2001.
Trt. No. |
Chemical(s) |
Rate per acre |
Application times1 |
1 |
Untreated check |
|
|
2 |
Calcium chloride |
2 qt |
bud, 10% bloom, and 100% bloom |
3 |
Calcium chloride |
3 qt |
10% bloom and 100% bloom |
4 |
Calcium chloride |
3 qt |
100% bloom and peak bloom |
5 |
Calcium chloride + Topsin |
3 qt 0.75 lb |
10% bloom 100% bloom |
6 |
Calcium chloride + Topsin + Topsin |
3 qt + 0.75 lb 0.75 lb |
100% bloom peak bloom |
7 |
Calcium chloride + Topsin |
3 qt + 0.75 lb |
10% bloom |
8 |
Calcium chloride + Topsin |
3 qt + 0.75 lb |
100% bloom |
9 |
Topsin |
0.75 lb |
100% bloom |
10 |
Topsin |
0.75 lb |
10% bloom and 100% bloom |
11 |
Topsin |
1.5 lb |
10% bloom and 100% bloom |
1Bud - June 29; 10% bloom - July 2; 100% bloom - July 9; peak bloom - July 13.
Row closure was at 20% on July 2 and at 80% on July 9.
Table 46. White mold incidence and severity, and yield in the calcium for white mold control in dry bean study at Oakes, ND, 2001.
Treatment number1 |
% incidence2 |
% severity3 |
Yield (lbs/acre) |
||
July 26 |
August 6 |
July 26 |
August 6 |
||
1 |
81.3 |
91.3 |
8.7 |
47.9 |
2543 |
2 |
82.5 |
100.0 |
10.9 |
60.5 |
2342 |
3 |
66.3 |
80.0 |
6.2 |
46.3 |
2208 |
4 |
68.8 |
82.5 |
8.4 |
38.4 |
2654 |
5 |
46.3 |
73.8 |
3.2 |
24.1 |
2833 |
6 |
50.0 |
75.0 |
4.7 |
23.0 |
2849 |
7 |
68.0 |
89.0 |
6.6 |
45.3 |
2322 |
8 |
51.3 |
68.8 |
3.9 |
23.2 |
2598 |
9 |
31.3 |
51.3 |
2.3 |
15.6 |
2815 |
10 |
35.0 |
63.8 |
2.5 |
22.8 |
2726 |
11 |
16.3 |
46.3 |
1.0 |
11.0 |
2833 |
LSD (0.05) |
14.2 |
12.6 |
4.7 |
16.2 |
376 |
1See Table 45 for treatment descriptions.
2Incidence based on number of infected plants divided by total number of observations.
3Severity is based on average percentage disease of four replications.
Rainfall was below average for the growing season. Frequent irrigation throughout the summer provided good soil moisture for plant development. Temperatures were warmer then the five-year average starting around June 8. These warm temperatures provided favorable plant growth. Plants began to flower around July 1. Plants continued to flower uniformly for most of the summer. White mold was not observed from natural infection so a suspension of white mold spores was sprayed on the middle two rows of each plot on July 9 to insure white mold infection. White mold was observed in the field around seven days later. White mold was uniform across the field.
Go to Oakes Irrigation Research Site 2001 annual report
Go to Oakes Irrigation Research Site disease studies