Abstract
Abstract Background Increasing cultivation of strawberry in Egypt has boosted efforts to increase its yield. Biocontrol agents (BCAs) may avoid side effects and health risks caused by chemical fungicides used to control black root rot disease in strawberry. Some BCAs control the disease and augment strawberry yield, but additional research is needed to fit BCAs into emerging control strategies. The impact of six bacterial isolates of Paenibacillus polymyxa and Bacillus brevis on this disease and on berry yield is reported and compared to a common chemical fungicide. Results The bacterial isolates reduced the growth of the black root rot causal agents Fusarium solani , Rhizoctonia solani , and Macrophomina phaseolina, in dual culture bioassays. The greatest fungal inhibition was caused by P. polymyxa isolates 1 and 2 and B . brevis isolate 2. They suppressed the growth of F. solani , R. solani , and M. phaseolina by more than 74, 76, and 79%, respectively. Disease severity and incidence were significantly reduced on naturally infected strawberry plants in the field by the six isolates. The best results were obtained by the superior bioassay isolates which suppressed the disease incidence by 73, 77, and 71%, and its severity by 72, 78, and 70%, respectively. Disease suppression by bacteria was comparable to that by fungicide Actamyl. Bacteria surpassed Actamyl with regard to strawberry yield and enhancement of peroxidase and chitinase activities in the leaves. Conclusions These isolates are potential benign alternatives to fungicides used against black root rot in strawberry in Egypt. More studies are needed to examine their economic use on a wider scale.
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Claims 10
Claim · model-written summary
Six bacterial isolates reduced growth of three black root rot pathogens in dual culture.
- Taxon
- strawberry
_single2.jpg?width=60)
Fragaria ×ananassat0 - Treatment
- bacterial isolatese0
- Interactor
- Fusarium solani
_Sacc._5393379.jpg?width=60)
Fusarium solanie0pathogen - Second interactor
- Rhizoctonia solani
Rhizoctonia solanie0pathogen - Outcome
- growth of the black root rot causal agentse0
- Direction
- reducede0
- Qualifier
- Macrophomina phaseolinae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
_Sacc._5393379.jpg?width=500)
Verbatim
e0“The bacterial isolates reduced the growth of the black root rot causal agents Fusarium solani , Rhizoctonia solani , and Macrophomina phaseolina, in dual culture bioassays.”
t0“Native bacteria for field biocontrol of black root rot in Egyptian strawberry”
Claim · model-written summary
P. polymyxa isolates 1 and 2 and B. brevis isolate 2 caused greatest fungal inhibition.
- Taxon
- strawberryFragaria ×ananassat0
- Interactor
- P. polymyxa isolates 1 and 2
Paenibacillus polymyxae0biocontrol_agent - Second interactor
- B . brevis isolate 2e0biocontrol_agent
- Outcome
- greatest fungal inhibitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greatest fungal inhibition was caused by P. polymyxa isolates 1 and 2 and B . brevis isolate 2.”
t0“Native bacteria for field biocontrol of black root rot in Egyptian strawberry”
Claim · model-written summary
Superior isolates suppressed fungal growth by more than 74%, 76%, and 79%, respectively.
- Taxon
- strawberryFragaria ×ananassat0
- Interactor
- F. solaniFusarium solanie0pathogen
- Second interactor
- R. solaniRhizoctonia solanie0pathogen
- Outcome
- growth of F. solani , R. solani , and M. phaseolinae0
- Direction
- suppressede0
- Value
- more than 74, 76, and 79%e0
- Qualifier
- M. phaseolinae0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“They suppressed the growth of F. solani , R. solani , and M. phaseolina by more than 74, 76, and 79%, respectively.”
t0“Native bacteria for field biocontrol of black root rot in Egyptian strawberry”
Claim · model-written summary
Six bacterial isolates significantly reduced disease severity and incidence in naturally infected field strawberry.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- six isolatese0
- Outcome
- Disease severity and incidencee0
- Direction
- reducede0
- Qualifier
- naturally infectede0
- Setting
- fielde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease severity and incidence were significantly reduced on naturally infected strawberry plants in the field by the six isolates.”
Claim · model-written summary
Superior isolates suppressed disease incidence by 73, 77, and 71%, respectively.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- superior bioassay isolatese0
- Outcome
- disease incidencee0
- Direction
- suppressede0
- Value
- 73, 77, and 71%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The best results were obtained by the superior bioassay isolates which suppressed the disease incidence by 73, 77, and 71%, and its severity by 72, 78, and 70%, respectively.”
t0“Native bacteria for field biocontrol of black root rot in Egyptian strawberry”
Claim · model-written summary
Superior isolates suppressed disease severity by 72, 78, and 70%, respectively.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- superior bioassay isolatese0
- Outcome
- severitye0
- Direction
- suppressede0
- Value
- 72, 78, and 70%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The best results were obtained by the superior bioassay isolates which suppressed the disease incidence by 73, 77, and 71%, and its severity by 72, 78, and 70%, respectively.”
t0“Native bacteria for field biocontrol of black root rot in Egyptian strawberry”
Claim · model-written summary
Bacterial disease suppression was comparable to Actamyl fungicide.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- bacteriae0
- Outcome
- Disease suppressione0
- Direction
- comparablee0
- Comparator
- fungicide Actamyle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease suppression by bacteria was comparable to that by fungicide Actamyl.”
t0“Native bacteria for field biocontrol of black root rot in Egyptian strawberry”
Claim · model-written summary
Bacteria surpassed Actamyl for strawberry yield.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- Bacteriae0
- Outcome
- strawberry yielde0
- Direction
- surpassede0
- Comparator
- Actamyle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacteria surpassed Actamyl with regard to strawberry yield and enhancement of peroxidase and chitinase activities in the leaves.”
Claim · model-written summary
Bacteria surpassed Actamyl for leaf peroxidase and chitinase activity enhancement.
- Taxon
- strawberryFragaria ×ananassae0
- Organ / stage
- leavese0
- Treatment
- Bacteriae0
- Outcome
- peroxidase and chitinase activitiese0
- Direction
- surpassede0
- Comparator
- Actamyle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacteria surpassed Actamyl with regard to strawberry yield and enhancement of peroxidase and chitinase activities in the leaves.”
Claim · model-written summary
The isolates are proposed as alternatives to fungicides for Egyptian strawberry black root rot.
- Taxon
- strawberryFragaria ×ananassae0
- Outcome
- potential benign alternatives to fungicidese0
- Setting
- Egypte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These isolates are potential benign alternatives to fungicides used against black root rot in strawberry in Egypt.”
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See all 6 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.