Abstract
The efficacy of chlorothalonil in controlling mycosphaerella blight in field pea was evaluated from 1998 to 2000 using 10 cultivars representing different leaf types, market classes, seed sizes, plant heights, and maturities. Significant differences ( P < 0.05) were observed among cultivars in disease severity, yield, 1000-seed weight (TSW), and seed infection each year. Cultivar × fungicide treatment interactions for these parameters were not significant in any of the 3 yr. Under both chlorothalonil treated and untreated conditions, Radley was the most resistant, while Carrera and Keoma were equally the most susceptible cultivars. A higher efficacy of chlorothalonil treatments was observed in 1999 when disease severity was greater than in 1998 or 2000. On average, chlorothalonil treatments reduced disease severity significantly in 1999 and 2000, but not in 1998. Overall, the fungicide increased yield by 6.4%, and TSW by 0.9–5.1%, which were significant in 1998 and 1999, but not in 2000. Based on 2-yr assessments of seed infection by Mycosphaerella pinodes, chlorothalonil reduced seed infection by 19.2%, which was significant in 1999, but not in 2000. Chlorothalonil treatments provide a greater benefit in years when disease pressure and yield potential are high. Key words: Field pea, Pisum sativum, mycosphaerella blight, Mycosphaerella pinodes, chlorothalonil
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Claims 10
Claim · model-written summary
Cultivars differed significantly in blight severity, yield, thousand-seed weight and seed infection each year.
Verbatim
e0“Significant differences ( P < 0.05) were observed among cultivars in disease severity, yield, 1000-seed weight (TSW), and seed infection each year”
t0“field pea”
Claim · model-written summary
Cultivar-by-fungicide interactions were not significant for those traits in any of three years.
- Taxon
- field peat0
- Treatment
- fungicide treatmente0
- Outcome
- Cultivar × fungicide treatment interactionse0
- Value
- 3 yre0
Not reportedDirection
Verbatim
e0“Cultivar × fungicide treatment interactions for these parameters were not significant in any of the 3 yr”
t0“field pea”
Claim · model-written summary
Radley was the most resistant cultivar under treated and untreated conditions.
Verbatim
e0“Under both chlorothalonil treated and untreated conditions, Radley was the most resistant”
t0“field pea”
Claim · model-written summary
Carrera and Keoma were equally the most susceptible cultivars.
Verbatim
e0“Carrera and Keoma were equally the most susceptible cultivars”
t0“field pea”
Claim · model-written summary
Chlorothalonil efficacy was higher in 1999, when severity was greater.
Verbatim
e0“A higher efficacy of chlorothalonil treatments was observed in 1999 when disease severity was greater than in 1998 or 2000”
t0“field pea”
Claim · model-written summary
Chlorothalonil significantly reduced disease severity in 1999 and 2000, but not 1998.
- Taxon
- field peat0
- Treatment
- chlorothalonil treatmentse0
- Outcome
- disease severitye0
- Direction
- reducede0
- Qualifier
- 1999 and 2000, but not in 1998e0
Not reportedComparator
Verbatim
e0“chlorothalonil treatments reduced disease severity significantly in 1999 and 2000, but not in 1998”
t0“field pea”
Claim · model-written summary
Fungicide increased pea yield by 6.4%, significantly in 1998 and 1999.
- Taxon
- field peat0
- Treatment
- fungicidee0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 6.4%e0
- Qualifier
- significant in 1998 and 1999, but not in 2000e0
Not reportedComparator
Verbatim
e0“the fungicide increased yield by 6.4%, and TSW by 0.9–5.1%, which were significant in 1998 and 1999, but not in 2000”
t0“field pea”
Claim · model-written summary
Fungicide increased thousand-seed weight by 0.9–5.1%, significantly in 1998 and 1999.
- Taxon
- field peat0
- Treatment
- fungicidee0
- Outcome
- TSWe0
- Direction
- increasede0
- Value
- 0.9–5.1%e0
- Qualifier
- significant in 1998 and 1999, but not in 2000e0
Not reportedComparator
Verbatim
e0“the fungicide increased yield by 6.4%, and TSW by 0.9–5.1%, which were significant in 1998 and 1999, but not in 2000”
t0“field pea”
Claim · model-written summary
Chlorothalonil reduced M. pinodes seed infection by 19.2%, significantly in 1999.
- Taxon
- field peat0
- Treatment
- chlorothalonile0
- Interactor
- Mycosphaerella pinodes
Didymella pinodese1pathogen - Outcome
- seed infectione0
- Direction
- reducede0
- Value
- 19.2%e0
- Qualifier
- significant in 1999, but not in 2000e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorothalonil reduced seed infection by 19.2%, which was significant in 1999, but not in 2000”
e1“seed infection by Mycosphaerella pinodes”
t0“field pea”
Claim · model-written summary
The authors conclude fungicide benefits are greater with high disease pressure and yield potential.
Verbatim
e0“Chlorothalonil treatments provide a greater benefit in years when disease pressure and yield potential are high”
t0“field pea”
The same questions in other papers
chlorothalonil · disease · Lathyrus oleraceus (pea)Results agree
1 paper in the same direction as this paper
- positive
chlorothalonil · Didymella pinodes · Lathyrus oleraceus (pea)Results agree
2 papers in the same direction as this paper
- positive
- positive
fungicide · yield · Lathyrus oleraceus (pea)Positive and negative results
10 papers in the same direction as this paper · 3 in the opposite direction
- negative
- no effect
- no effect
10 papers more in this group
See all 14 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.