Abstract
Yield losses in soybean ( Glycine max (L.) Merr.) caused by natural infection with Microsphaera diffusa Cke. & Pk., the powdery mildew fungus, have not been determined. The objective of this study was to determine if M. diffusa caused loss of seed yield in soybeans. Three susceptible (‘Harosoy 63’, ‘Kanrich’, and ‘Bonus’) and three resistant (‘Lindarin 63’, ‘Wayne’, and ‘Cutler 71’) cultivars were tested. A spray containing benomyl (methyl 1‐(butylcarbamoyl)‐2‐benzimidazole carbamate) was applied to plant rows until runoff, once a week from 1 July until near plant maturity. Nonsprayed rows served as controls. The incidence of powdery mildew increased rapidly during July, and by the end of the month nearly all leaves of all susceptible cultivars were infected. Seed yield of the susceptible cultivars was significantly (p < 0.01) higher in benomyl‐sprayed than in nonsprayed plants: 9, 15, and 10% higher for Harosoy 63, Kanrich, and Bonus, respectively. Seed yield of the resistant cultivars was not affected by spraying with benomyl, indicating that the higher yield from spraying susceptible cultivars was only from the control of powdery mildew. The mean loss of yield caused by powdery mildew was 10.1%, which suggests that use of powdery mildew resistant cultivars by soybean producers in areas where powdery mildew occurs, would be beneficial.
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Claims 7
Claim · model-written summary
Powdery mildew rapidly infected nearly all leaves of susceptible soybean cultivars by late July.
- Taxon
- soybean
Glycine maxt0 - Interactor
- powdery mildewe0pathogen
- Outcome
- incidence of powdery mildewe0
- Direction
- increased rapidlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The incidence of powdery mildew increased rapidly during July, and by the end of the month nearly all leaves of all susceptible cultivars were infected.”
t0“Soybean”
Claim · model-written summary
Benomyl spraying increased seed yield of Harosoy 63 by 9% compared with no spray.
- Taxon
- soybeanGlycine maxt0
- Material
- Harosoy 63e0
- Treatment
- benomyl‐sprayede0
- Outcome
- Seed yielde0
- Direction
- highere0
- Value
- 9e0
- Comparator
- nonsprayed plantse0
Not reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield of the susceptible cultivars was significantly (p < 0.01) higher in benomyl‐sprayed than in nonsprayed plants: 9, 15, and 10% higher for Harosoy 63, Kanrich, and Bonus, respectively.”
t0“Soybean”
Claim · model-written summary
Benomyl spraying increased seed yield of Kanrich by 15% compared with no spray.
- Taxon
- soybeanGlycine maxt0
- Material
- Kanriche0
- Treatment
- benomyl‐sprayede0
- Outcome
- Seed yielde0
- Direction
- highere0
- Value
- 15e0
- Comparator
- nonsprayed plantse0
Not reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield of the susceptible cultivars was significantly (p < 0.01) higher in benomyl‐sprayed than in nonsprayed plants: 9, 15, and 10% higher for Harosoy 63, Kanrich, and Bonus, respectively.”
t0“Soybean”
Claim · model-written summary
Benomyl spraying increased seed yield of Bonus by 10% compared with no spray.
- Taxon
- soybeanGlycine maxt0
- Material
- Bonuse0
- Treatment
- benomyl‐sprayede0
- Outcome
- Seed yielde0
- Direction
- highere0
- Value
- 10e0
- Comparator
- nonsprayed plantse0
Not reportedInteractor
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield of the susceptible cultivars was significantly (p < 0.01) higher in benomyl‐sprayed than in nonsprayed plants: 9, 15, and 10% higher for Harosoy 63, Kanrich, and Bonus, respectively.”
t0“Soybean”
Claim · model-written summary
Benomyl spraying did not affect seed yield of resistant soybean cultivars.
- Taxon
- soybeanGlycine maxt0
- Material
- resistant cultivarse0
- Treatment
- spraying with benomyle0
- Outcome
- Seed yielde0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield of the resistant cultivars was not affected by spraying with benomyl”
t0“Soybean”
Claim · model-written summary
Powdery mildew caused a mean soybean yield loss of 10.1%.
- Taxon
- soybeanGlycine maxt0
- Interactor
- powdery mildewe0pathogen
- Outcome
- loss of yielde0
- Direction
- losse0
- Value
- 10.1%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mean loss of yield caused by powdery mildew was 10.1%”
t0“Soybean”
Claim · model-written summary
The authors suggest powdery mildew resistant cultivars would benefit soybean producers where the disease occurs.
- Taxon
- soybeanGlycine maxe0
- Interactor
- powdery mildewe0pathogen
- Outcome
- use of powdery mildew resistant cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“use of powdery mildew resistant cultivars by soybean producers in areas where powdery mildew occurs, would be beneficial”
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