Abstract
Conventional management of stem rot disease of potato, caused by Neocosmospora rubicola , through fungicide application is an environmentally unfavorable practice that calls for an alternative biocontrol approach. Plant growth-promoting bacteria (PGPB) are known to not only promote plant growth but also control diseases caused by various fungi. The study was designed to evaluate the potential of three strains of PGPB and synthetic fertilizer to manage stem rot of potatoes. In the first experiment, PGPB strains Azotobacter chroococcum, Azospirillum lipoferum , and Pseudomonas putida and their combinations were evaluated on PDA medium against N. rubicola using the dual culture technique. All three bacterial strains were found effective in reducing the radial growth of the fungus maximum up to 91%. In the second experiment, in the presence of half and full recommended doses of fertilizer nitrogen (N) and phosphorus (P), the potato growing medium was inoculated with N. rubicola alone, and with combinations of N. rubicola and PGPB strains (bacterial formulation; BF). N. rubicola increased stem and tuber rot, and decreased tuber weight by 11% compared to the control. On the other hand, sole inoculation with BF significantly increased tuber weight. In addition, a combined inoculation of N. rubicola and BF, or N. rubicola inoculation a week prior to BF inoculation did not affect tuber weight compared to control. However, inoculation of BF a week prior to N. rubicola , controlled rot symptoms and increased tuber weight by 32%. An increase in P application favored the PGPB strains in controlling rot in tubers. The interaction effect of fertilizer N with the inoculation combinations was non-significant; however, the main impact of N was to increase rot in tubers and decrease in potato stems. Hence a prerequisite application of PGPB formulation proved to be an effective tool against N. rubicola infestation in potatoes.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 13
Claim · model-written summary
Each bacterial strain reduced pathogen radial growth on PDA by as much as 91%.
- Taxon
- potato
Solanum tuberosume0e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All three bacterial strains were found effective in reducing the radial growth of the fungus maximum up to 91%”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
Claim · model-written summary
N. rubicola increased potato stem rot.
- Taxon
- potatoSolanum tuberosume0e1
- Interactor
- N. rubicola[Neocosmospora] rubicolae0e1pathogen
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N. rubicola increased stem and tuber rot, and decreased tuber weight by 11% compared to the control”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
Claim · model-written summary
N. rubicola increased potato tuber rot.
- Taxon
- potatoSolanum tuberosume0e1
- Interactor
- N. rubicola[Neocosmospora] rubicolae0e1pathogen
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N. rubicola increased stem and tuber rot, and decreased tuber weight by 11% compared to the control”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
Claim · model-written summary
N. rubicola reduced tuber weight by 11% versus control.
- Taxon
- potatoSolanum tuberosume0e1
- Interactor
- N. rubicola[Neocosmospora] rubicolae0e1pathogen
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N. rubicola increased stem and tuber rot, and decreased tuber weight by 11% compared to the control”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
Claim · model-written summary
Bacterial formulation alone significantly increased tuber weight.
- Taxon
- potatoSolanum tuberosume0e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sole inoculation with BF significantly increased tuber weight”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
Claim · model-written summary
Simultaneous pathogen and BF inoculation did not affect tuber weight versus control.
- Taxon
- potatoSolanum tuberosume0e1
- Interactor
- N. rubicola[Neocosmospora] rubicolae0e1pathogen
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a combined inoculation of N. rubicola and BF, or N. rubicola inoculation a week prior to BF inoculation did not affect tuber weight compared to control”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
Claim · model-written summary
Pathogen inoculation one week before BF did not affect tuber weight versus control.
- Taxon
- potatoSolanum tuberosume0e1
- Interactor
- N. rubicola[Neocosmospora] rubicolae0e1pathogen
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N. rubicola inoculation a week prior to BF inoculation did not affect tuber weight compared to control”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
Claim · model-written summary
BF one week before pathogen inoculation controlled rot symptoms.
- Taxon
- potatoSolanum tuberosume0e1
- Interactor
- N. rubicola[Neocosmospora] rubicolae0e1pathogen
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation of BF a week prior to N. rubicola , controlled rot symptoms and increased tuber weight by 32%”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
Claim · model-written summary
BF one week before pathogen inoculation increased tuber weight by 32%.
- Taxon
- potatoSolanum tuberosume0e1
- Interactor
- N. rubicola[Neocosmospora] rubicolae0e1pathogen
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation of BF a week prior to N. rubicola , controlled rot symptoms and increased tuber weight by 32%”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
Claim · model-written summary
More phosphorus application favored bacterial control of tuber rot.
- Taxon
- potatoSolanum tuberosume0e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An increase in P application favored the PGPB strains in controlling rot in tubers”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
Claim · model-written summary
Nitrogen and inoculation combination interaction was nonsignificant.
- Taxon
- potatoSolanum tuberosume0e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interaction effect of fertilizer N with the inoculation combinations was non-significant”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
Claim · model-written summary
Nitrogen increased tuber rot.
- Taxon
- potatoSolanum tuberosume0e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the main impact of N was to increase rot in tubers”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
Claim · model-written summary
Nitrogen decreased stem rot.
- Taxon
- potatoSolanum tuberosume0e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decrease in potato stems”
e1“stem rot disease of potato, caused by Neocosmospora rubicola”
The same questions in other papers
phosphorus · disease · Solanum tuberosum (potato)Positive and negative results
3 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- negative
3 papers more in this group
See all 7 papers →nitrogen · disease · Solanum tuberosum (potato)Positive and negative results
3 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 papers →inoculation · yield · Solanum tuberosum (potato)Positive and negative results
79 papers in the same direction as this paper · 13 in the opposite direction
- negative
- negative
- no effect
89 papers more in this group
See all 93 papers →inoculation · disease · Solanum tuberosum (potato)Positive and negative results
52 papers in the same direction as this paper · 59 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
109 papers more in this group
See all 113 papers →nitrogen · organism · Solanum tuberosum (potato)Results agree
1 paper in the same direction as this paper
- positive
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.