Abstract
Rice crops are susceptible to disease, which causes large yield losses in many Asian countries. The influence of disease incidence and severity on grain yield and quality of the rice (Oryza sativa L., cv. BRRI dhan29) was investigated in three different locations of Chief Farm Superintendent’s (CFS) farm viz. Near Weather Yard (location-1), Near Agronomy Farm (location-2) and Near CFS farm office (location-3), Bangladesh Agricultural University (BAU), mymensingh, Bangladesh during boro season. In location-1, both brown spot and sheath blight were recorded whereas in location-2 and in location-3 only brown spot was recorded. Severity of brown spot was lowest at the location-1 and the highest at the location-3. Combined incidence of brown spot and sheath blight decreased the yield considerably whereas brown spot did not alone. Maximum severity of sheath blight was observed both in flowering and soft dough stage and minimum at maximum tillering stage. The lowest infection index of brown spot was obtained at maximum tillering stage and the highest infection index was obtained at soft dough stage whereas maximum and minimum infection index of sheath blight of rice were recorded at soft dough stage and maximum tillering stage, respectively. Aparently healthy seeds, spotted seeds, discoloured seeds, deformed seeds and chaffy grains were found among the three locations. Germination percentage was highest in healthy seeds compared to other category seeds. Alternaria padwickii, Alternaria tenuis, Bipolaris oryzae, Curvularia lunata and Fusarium semitectum were found to be associated with the seed. The highest and lowest occurrence of A. padwickii, A. tenuis, B. oryzae, C. lunata were recorded from chaffy grains and from healthy seeds, respectively. It is suggest that disease incidence and severity was gradually increased with the age of the plant and reduced yield and quality of BRRI dhan29. Int J Appl Sci Biotechnol, Vol 4(3): 311-317
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Claims 15
Claim · model-written summary
Combined incidence of brown spot and sheath blight decreased rice yield considerably.
- Taxon
- Oryza sativa L.
Oryza sativae1 - Treatment
- Combined incidence of brown spot and sheath blighte0
- Interactor
- brown spote0pathogen
- Second interactor
- sheath blighte0pathogen
- Outcome
- yielde0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e0“Combined incidence of brown spot and sheath blight decreased the yield considerably whereas brown spot did not alone”
Claim · model-written summary
Brown spot alone did not reduce rice yield.
- Taxon
- Oryza sativa L.Oryza sativae1
- Interactor
- brown spote0pathogen
- Outcome
- yielde0
- Qualifier
- brown spot did not alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e0“Combined incidence of brown spot and sheath blight decreased the yield considerably whereas brown spot did not alone”
Claim · model-written summary
Severity of brown spot was lowest at location-1.
- Taxon
- Oryza sativa L.Oryza sativae1
- Interactor
- brown spote2pathogen
- Outcome
- Severity of brown spote2
- Direction
- loweste2
- Setting
- location-1e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e2“Severity of brown spot was lowest at the location-1 and the highest at the location-3”
Claim · model-written summary
Severity of brown spot was highest at location-3.
- Taxon
- Oryza sativa L.Oryza sativae1
- Interactor
- brown spote2pathogen
- Outcome
- Severity of brown spote2
- Direction
- higheste2
- Setting
- location-3e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e2“Severity of brown spot was lowest at the location-1 and the highest at the location-3”
Claim · model-written summary
Severity of sheath blight was maximum at the flowering and soft dough stages.
- Taxon
- Oryza sativa L.Oryza sativae1
- Organ / stage
- flowering and soft dough stagee3
- Interactor
- sheath blighte3pathogen
- Outcome
- severity of sheath blighte3
- Direction
- Maximume3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e3“Maximum severity of sheath blight was observed both in flowering and soft dough stage and minimum at maximum tillering stage”
Claim · model-written summary
Severity of sheath blight was minimum at the maximum tillering stage.
- Taxon
- Oryza sativa L.Oryza sativae1
- Organ / stage
- maximum tillering stagee3
- Interactor
- sheath blighte3pathogen
- Outcome
- severity of sheath blighte3
- Direction
- minimume3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e3“Maximum severity of sheath blight was observed both in flowering and soft dough stage and minimum at maximum tillering stage”
Claim · model-written summary
Infection index of brown spot was lowest at the maximum tillering stage.
- Taxon
- Oryza sativa L.Oryza sativae1
- Organ / stage
- maximum tillering stagee4
- Interactor
- brown spote4pathogen
- Outcome
- infection index of brown spote4
- Direction
- loweste4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e4“The lowest infection index of brown spot was obtained at maximum tillering stage and the highest infection index was obtained at soft dough stage”
Claim · model-written summary
Infection index of brown spot was highest at the soft dough stage.
- Taxon
- Oryza sativa L.Oryza sativae1
- Organ / stage
- soft dough stagee4
- Interactor
- brown spote4pathogen
- Outcome
- infection index of brown spote4
- Direction
- higheste4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e4“The lowest infection index of brown spot was obtained at maximum tillering stage and the highest infection index was obtained at soft dough stage”
Claim · model-written summary
Infection index of sheath blight was maximum at the soft dough stage.
- Taxon
- Oryza sativa L.Oryza sativae1
- Organ / stage
- soft dough stagee5
- Interactor
- sheath blighte5pathogen
- Outcome
- infection index of sheath blighte5
- Direction
- maximume5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e5“whereas maximum and minimum infection index of sheath blight of rice were recorded at soft dough stage and maximum tillering stage, respectively”
Claim · model-written summary
Infection index of sheath blight was minimum at the maximum tillering stage.
- Taxon
- Oryza sativa L.Oryza sativae1
- Organ / stage
- maximum tillering stagee5
- Interactor
- sheath blighte5pathogen
- Outcome
- infection index of sheath blighte5
- Direction
- minimume5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e5“whereas maximum and minimum infection index of sheath blight of rice were recorded at soft dough stage and maximum tillering stage, respectively”
Claim · model-written summary
Germination percentage was highest in healthy seeds compared with other seed categories.
- Taxon
- Oryza sativa L.Oryza sativae1
- Organ / stage
- healthy seedse6
- Outcome
- Germination percentagee6
- Direction
- higheste6
- Comparator
- other category seedse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e6“Germination percentage was highest in healthy seeds compared to other category seeds”
Claim · model-written summary
Occurrence of Alternaria padwickii and other seed-associated fungi was highest in chaffy grains.
- Taxon
- Oryza sativa L.Oryza sativae1
- Organ / stage
- chaffy grainse7
- Interactor
- A. padwickii
Alternaria padwickiie7pathogen - Outcome
- occurrencee7
- Direction
- higheste7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e7“The highest and lowest occurrence of A. padwickii, A. tenuis, B. oryzae, C. lunata were recorded from chaffy grains and from healthy seeds, respectively”
Claim · model-written summary
Occurrence of Alternaria padwickii and other seed-associated fungi was lowest in healthy seeds.
- Taxon
- Oryza sativa L.Oryza sativae1
- Organ / stage
- healthy seedse7
- Interactor
- A. padwickiiAlternaria padwickiie7pathogen
- Outcome
- occurrencee7
- Direction
- loweste7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e7“The highest and lowest occurrence of A. padwickii, A. tenuis, B. oryzae, C. lunata were recorded from chaffy grains and from healthy seeds, respectively”
Claim · model-written summary
Disease incidence and severity gradually increased with plant age.
- Taxon
- Oryza sativa L.Oryza sativae1
- Treatment
- age of the plante7
- Outcome
- disease incidence and severitye7
- Direction
- gradually increasede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e7“The highest and lowest occurrence of A. padwickii, A. tenuis, B. oryzae, C. lunata were recorded from chaffy grains and from healthy seeds, respectively. It is suggest that disease incidence and severity was gradually increased with the age of the plant and reduced yield and quality of BRRI dhan29”
Claim · model-written summary
Disease incidence and severity reduced the yield and quality of BRRI dhan29.
- Taxon
- Oryza sativa L.Oryza sativae1
- Outcome
- yield and qualitye7
- Direction
- reducede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the rice (Oryza sativa L., cv. BRRI dhan29)”
e7“The highest and lowest occurrence of A. padwickii, A. tenuis, B. oryzae, C. lunata were recorded from chaffy grains and from healthy seeds, respectively. It is suggest that disease incidence and severity was gradually increased with the age of the plant and reduced yield and quality of BRRI dhan29”