Abstract
In order to determine the effect of biocontrol agents used for inducing resistance in plants against Marssonina leaf blotch caused by the fungus Marssonina coronaria (Ellis & J.J. Davis) J.J. Davis two polyhouse trials were conducted using scion bud wood of cultivars Starking Delicious, Tydeman’s Early Worcester and Granny Smith apple. Three biocontrol agents, Trichoderma viride, Pseudomonas fluorescens and Bacillus subtilis, at three different dilution i.e. 10-3, 10-4, 10-5 for fungi and 10- 3, 10-5 and 10-7 for bacteria were applied on the test cultivars 48 hrs before inoculation. Distilled sterilized water was sprayed on control plants. All the biocontrol agents significantly lowered the disease intensity as compared to control. Pseudomonas fluorescens and Bacillus subtilis and Trichoderma viride, reduced disease severity by 15.50 – 33.50 per cent on the leaves Starking Delicious cultivar. Similarly, disease severity data in cultivar Tydeman’s Early Worcester ranged from 5.33-16.66 per cent and on the leaves of cultivar Granny Smith it ranged from1.68-6.00 per cent against 28 and 9 per cent in Tydeman’s Early Worcester and Granny Smith respectively. The activity of the defense enzymes peroxidase (PO), polyphenol oxidase (PPO), phenylalanine ammonia lyase (PAL) was found maximum in Pseudomonas fluorescens treated leaves in all the test cultivars. Thus biocontrol agents have potential for the control of Marssonina leaf blotch of apple in the field.
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Claims 6
Claim · model-written summary
All three biocontrol agents significantly lowered Marssonina leaf blotch disease intensity on apple compared with control.
- Taxon
- apple
Malus domesticat0 - Treatment
- biocontrol agentse0
- Interactor
- Marssonina coronariat0pathogen
- Outcome
- disease intensitye0
- Direction
- lowerede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Marssonina leaf blotch of apple caused by Marssonina coronaria”
e0“All the biocontrol agents significantly lowered the disease intensity as compared to control”
Claim · model-written summary
Pseudomonas fluorescens, Bacillus subtilis and Trichoderma viride reduced disease severity by 15.50 – 33.50 per cent on leaves of apple cultivar Starking Delicious.
- Taxon
- appleMalus domesticat0
- Material
- Starking Deliciouse0
- Organ / stage
- leavese0
- Treatment
- Pseudomonas fluorescens and Bacillus subtilis and Trichoderma viridee0
- Interactor
- Marssonina coronariat0pathogen
- Outcome
- disease severitye0
- Direction
- reducede0
- Value
- 15.50 – 33.50 per cente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Marssonina leaf blotch of apple caused by Marssonina coronaria”
e0“Pseudomonas fluorescens and Bacillus subtilis and Trichoderma viride, reduced disease severity by 15.50 – 33.50 per cent on the leaves Starking Delicious cultivar”
Claim · model-written summary
Disease severity in biocontrol-treated apple cultivar Tydeman’s Early Worcester ranged from 5.33-16.66 per cent, against 28 per cent in control.
- Taxon
- appleMalus domesticat0
- Material
- Tydeman’s Early Worcestere0
- Treatment
- biocontrol agentse1
- Interactor
- Marssonina coronariat0pathogen
- Outcome
- disease severitye0
- Direction
- decreaseinferrede0
- Value
- 5.33-16.66 per cente0
- Qualifier
- against 28 and 9 per cente2
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Marssonina leaf blotch of apple caused by Marssonina coronaria”
e0“disease severity data in cultivar Tydeman’s Early Worcester ranged from 5.33-16.66 per cent”
e1“All the biocontrol agents significantly lowered the disease intensity as compared to control”
e2“against 28 and 9 per cent”
Claim · model-written summary
Disease severity in biocontrol-treated apple cultivar Granny Smith ranged from 1.68-6.00 per cent, against 9 per cent in control.
- Taxon
- appleMalus domesticat0
- Material
- Granny Smithe0
- Organ / stage
- leavese0
- Treatment
- biocontrol agentse1
- Interactor
- Marssonina coronariat0pathogen
- Outcome
- disease severitye0
- Direction
- decreaseinferrede0
- Value
- 1.68-6.00 per cente0
- Qualifier
- against 28 and 9 per cente2
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Marssonina leaf blotch of apple caused by Marssonina coronaria”
e0“disease severity data in cultivar Tydeman’s Early Worcester ranged from 5.33-16.66 per cent and on the leaves of cultivar Granny Smith it ranged from1.68-6.00 per cent”
e1“All the biocontrol agents significantly lowered the disease intensity as compared to control”
e2“against 28 and 9 per cent”
Claim · model-written summary
The activity of the defense enzymes peroxidase, polyphenol oxidase and phenylalanine ammonia lyase was highest in Pseudomonas fluorescens treated apple leaves in all test cultivars.
- Taxon
- appleMalus domesticat0
- Organ / stage
- leavese0
- Treatment
- Pseudomonas fluorescens treatede0
- Outcome
- activity of the defense enzymes peroxidase (PO), polyphenol oxidase (PPO), phenylalanine ammonia lyase (PAL)e0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Marssonina leaf blotch of apple caused by Marssonina coronaria”
e0“The activity of the defense enzymes peroxidase (PO), polyphenol oxidase (PPO), phenylalanine ammonia lyase (PAL) was found maximum in Pseudomonas fluorescens treated leaves in all the test cultivars”
Claim · model-written summary
The authors conclude that biocontrol agents have potential for controlling Marssonina leaf blotch of apple in the field.
- Taxon
- appleMalus domesticae0
- Outcome
- potential for the control of Marssonina leaf blotche0
- Setting
- in the fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biocontrol agents have potential for the control of Marssonina leaf blotch of apple in the field”
The same questions in other papers
Pseudomonas fluorescens · disease · Malus domestica (apple)Results agree
1 paper in the same direction as this paper
- positive
Bacillus subtilis · disease · Malus domestica (apple)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →biocontrol · disease · Malus domestica (apple)Results agree
15 papers in the same direction as this paper
- positive
- positive
- positive
12 papers more in this group
See all 16 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.