Abstract
The methanol extract of stems of Catalpa ovata G Don exhibits potent in vivo antifungal activity against Magnaporthe grisea (Hebert) Barr (rice blast) on rice plants, Botrytis cinerea Pers ex Fr (tomato grey mould) and Phytophthora infestans (Mont) de Bary (tomato late blight) on tomato plants, Puccinia recondita Rob ex Desm (wheat leaf rust) on wheat plants and Blumeria graminis (DC) Speer f. sp. hordei Marchal (barley powdery mildew) on barley plants. An antifungal substance was isolated and identified as dehydro-alpha-lapachone from mass and nuclear magnetic resonance spectral data. It completely inhibited the mycelial growth of B. cinerea, Colletotrichum acutatum Simmonds, Colletotrichum gloeosporioides Simmonds, M. grisea and Pythium ultimum Trow over a range of 0.4-33.3 mg litre(-1). It also controlled the development of rice blast, tomato late blight, wheat leaf rust, barley powdery mildew and red pepper anthracnose (Colletotrichum coccodes (Wallr) S Hughes). The chemical was particularly effective in suppressing red pepper anthracnose by 95% at a concentration of 125 mg litre(-1).
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Claims 6
Claim · model-written summary
Catalpa ovata stem extract showed potent antifungal activity against rice blast on rice plants.
- Taxon
- rice
Oryza sativae0 - Treatment
- methanol extract of stems of Catalpa ovata G Done0
- Interactor
- Magnaporthe grisea
Pyricularia griseae0pathogen - Outcome
- rice blaste0
- Direction
- potente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The methanol extract of stems of Catalpa ovata G Don exhibits potent in vivo antifungal activity against Magnaporthe grisea (Hebert) Barr (rice blast) on rice plants”
Claim · model-written summary
Catalpa ovata stem extract showed potent antifungal activity against tomato grey mould on tomato plants.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- methanol extract of stems of Catalpa ovata G Done1
- Interactor
- Botrytis cinerea
Botrytis cinereae0pathogen - Outcome
- tomato grey moulde0
- Direction
- potente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Botrytis cinerea Pers ex Fr (tomato grey mould) and Phytophthora infestans (Mont) de Bary (tomato late blight) on tomato plants”
e1“The methanol extract of stems of Catalpa ovata G Don exhibits potent in vivo antifungal activity”
Claim · model-written summary
Catalpa ovata stem extract showed potent antifungal activity against tomato late blight.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- methanol extract of stems of Catalpa ovata G Done1
- Interactor
- Phytophthora infestans
Phytophthora infestanse0pathogen - Outcome
- tomato late blighte0
- Direction
- potente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytophthora infestans (Mont) de Bary (tomato late blight) on tomato plants”
e1“The methanol extract of stems of Catalpa ovata G Don exhibits potent in vivo antifungal activity”
Claim · model-written summary
Catalpa ovata stem extract showed potent antifungal activity against wheat leaf rust.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- methanol extract of stems of Catalpa ovata G Done1
- Interactor
- Puccinia recondita
.jpeg?width=60)
Puccinia reconditae0pathogen - Outcome
- wheat leaf ruste0
- Direction
- potente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
e0“Puccinia recondita Rob ex Desm (wheat leaf rust) on wheat plants”
e1“The methanol extract of stems of Catalpa ovata G Don exhibits potent in vivo antifungal activity”
Claim · model-written summary
Catalpa ovata stem extract showed potent antifungal activity against barley powdery mildew.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- methanol extract of stems of Catalpa ovata G Done1
- Interactor
- Blumeria graminis
Blumeria graminise0pathogen - Outcome
- barley powdery mildewe0
- Direction
- potente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Blumeria graminis (DC) Speer f. sp. hordei Marchal (barley powdery mildew) on barley plants”
e1“The methanol extract of stems of Catalpa ovata G Don exhibits potent in vivo antifungal activity”
Claim · model-written summary
Dehydro-alpha-lapachone was identified from Catalpa ovata stems.
- Taxon
- Catalpa ovata
.jpg?width=60)
Catalpa ovatat0 - Organ / stage
- stemst0
- Outcome
- dehydro-alpha-lapachonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“An antifungal substance was isolated and identified as dehydro-alpha-lapachone”
t0“Catalpa ovata stems”
The same questions in other papers
botanical · Phytophthora infestans · Solanum lycopersicum (tomato)Positive and negative results
23 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
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See all 25 papers →botanical · Botrytis cinerea · Solanum lycopersicum (tomato)Positive and negative results
38 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
36 papers more in this group
See all 40 papers →botanical · Blumeria graminis · Hordeum vulgare (barley)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
botanical · Pyricularia grisea · Oryza sativa (rice)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →botanical · Puccinia recondita · Triticum aestivum (wheat)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.