Abstract
Purple blotch of onion caused by the fungus Alternaria porri is a serious disease in kharif season and more yield losses in onion growing areas of Maharashtra. A survey was conducted to assess disease intensity of major diseases in onion growing area in Nashik district during kharif 2020 and 2021 During the survey, small whitish, leaf curling, twisting, chlorosis of leaves, elongation of neck and cylindrical bulb such symptoms of twister disease were observed more severe than purple blotch on onion in kharif 2020. The per cent disease severity ranged from 17.28 to 45.83 per cent and 8.00 to 23.00 per cent in purple blotch of onion and 20.17 to 54.59 per cent and 12.00 to 35.00 per cent twister disease of onion during kharif 2020 and 2021, respectively. The diseased samples were utilized for isolation of pathogen. After isolation and morphological study, it is indicated that twister disease of onion was complex of pathogen caused by Colletotrichum gloeosporioides, Fusarium sp. and nematode. Due to climate change, from the survey concluded that twister disease was found more serious and threatening disease than purple blotch of onion during kharif 2020 and 2021. Considering the yield losses caused by twister disease of onion, the investigation was planned for management of twister disease during kharif 21. The combine application of Trichoderma drenching @ 10 g/l along with two alternate sprays of each Tebuconazole 25.9 EC @ 1 ml/l or Azoxystrobin 23 SC@ 1 ml/l recorded lowest PDI of twister disease (14.33%) of onion than the control treatment (49.11%) and which was found effective maximum per cent disease over control (70.82%) for management of twister disease of onion.
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Claims 11
Claim · model-written summary
Twister disease symptoms were more severe than purple blotch in kharif 2020.
- Taxon
- onion
Allium cepae0 - Outcome
- symptoms of twister diseasee0
- Direction
- more severee0
- Comparator
- purple blotche0
- Setting
- kharif 2020e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“symptoms of twister disease were observed more severe than purple blotch on onion in kharif 2020”
Claim · model-written summary
Purple blotch severity ranged from 17.28 to 45.83 percent in 2020.
- Taxon
- OnionAllium cepat0
- Interactor
- Alternaria porri
.jpg?width=60)
Alternaria porrie1pathogen - Outcome
- Major Onion Diseasest0
- Value
- 17.28 to 45.83 per cente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“17.28 to 45.83 per cent”
t0“Survey, Occurrence of Major Onion Diseases and Management of Twister Disease of Onion (Allium cepa L.)”
e1“Purple blotch of onion caused by the fungus Alternaria porri”
Claim · model-written summary
Purple blotch severity ranged from 8.00 to 23.00 percent in 2021.
- Taxon
- onionAllium cepae0
- Interactor
- Alternaria porriAlternaria porrie1pathogen
- Outcome
- purple blotche0
- Value
- 8.00 to 23.00 per cente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“8.00 to 23.00 per cent in purple blotch of onion”
e1“Purple blotch of onion caused by the fungus Alternaria porri”
Claim · model-written summary
Twister disease severity ranged from 20.17 to 54.59 percent in 2020.
- Taxon
- OnionAllium cepat0
- Interactor
- Colletotrichum gloeosporioides
Colletotrichum gloeosporioidese1pathogen - Outcome
- Twister Diseaset0
- Value
- 20.17 to 54.59 per cente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“20.17 to 54.59 per cent”
t0“Survey, Occurrence of Major Onion Diseases and Management of Twister Disease of Onion (Allium cepa L.)”
e1“twister disease of onion was complex of pathogen caused by Colletotrichum gloeosporioides”
Claim · model-written summary
Twister disease severity ranged from 12.00 to 35.00 percent in 2021.
- Taxon
- onionAllium cepae0
- Interactor
- Colletotrichum gloeosporioidesColletotrichum gloeosporioidese1pathogen
- Outcome
- twister diseasee0
- Value
- 12.00 to 35.00 per cente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“12.00 to 35.00 per cent twister disease of onion”
e1“twister disease of onion was complex of pathogen caused by Colletotrichum gloeosporioides”
Claim · model-written summary
Colletotrichum gloeosporioides was identified in the twister disease complex.
- Taxon
- onionAllium cepae0
- Interactor
- Colletotrichum gloeosporioidesColletotrichum gloeosporioidese0pathogen
- Outcome
- twister disease of onione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“twister disease of onion was complex of pathogen caused by Colletotrichum gloeosporioides”
Claim · model-written summary
Fusarium sp. was identified in the twister disease complex.
- Taxon
- onionAllium cepae0
- Outcome
- twister disease of onione0
FusariumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“twister disease of onion was complex of pathogen caused by Colletotrichum gloeosporioides, Fusarium sp.”
Claim · model-written summary
A nematode was identified in the twister disease complex.
- Taxon
- onionAllium cepae0
- Outcome
- twister disease of onione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“twister disease of onion was complex of pathogen caused by Colletotrichum gloeosporioides, Fusarium sp. and nematode”
Claim · model-written summary
Twister disease was considered more serious than purple blotch in 2020 and 2021.
- Taxon
- onionAllium cepae0
- Outcome
- twister diseasee0
- Direction
- more serious and threateninge0
- Comparator
- purple blotche0
- Setting
- kharif 2020 and 2021e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“twister disease was found more serious and threatening disease than purple blotch of onion during kharif 2020 and 2021”
Claim · model-written summary
Combined Trichoderma drenching and alternating fungicide sprays produced 14.33% twister disease PDI versus 49.11% in controls.
- Taxon
- onionAllium cepae0
- Treatment
- Trichoderma drenching @ 10 g/l along with two alternate sprays of each Tebuconazole 25.9 EC @ 1 ml/l or Azoxystrobin 23 SC@ 1 ml/le0
- Interactor
- Trichoderma
Trichodermae0biocontrol_agent - Outcome
- PDI of twister diseasee0
- Direction
- loweste0
- Value
- 14.33%e0
- Qualifier
- 49.11%e0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combine application of Trichoderma drenching @ 10 g/l along with two alternate sprays of each Tebuconazole 25.9 EC @ 1 ml/l or Azoxystrobin 23 SC@ 1 ml/l recorded lowest PDI of twister disease (14.33%) of onion than the control treatment (49.11%)”
Claim · model-written summary
The combined treatment achieved 70.82% disease control over control.
- Taxon
- onionAllium cepae0
- Treatment
- Trichoderma drenching @ 10 g/le1
- Interactor
- TrichodermaTrichodermae1biocontrol_agent
- Outcome
- per cent disease over controle0
- Direction
- maximume0
- Value
- 70.82%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effective maximum per cent disease over control (70.82%) for management of twister disease of onion”
e1“The combine application of Trichoderma drenching @ 10 g/l along with two alternate sprays of each Tebuconazole 25.9 EC @ 1 ml/l or Azoxystrobin 23 SC@ 1 ml/l”
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