Abstract
Onion suffers from many diseases and among them purple blotch complex is devastating for both bulb and seed production in Bangladesh. To formulate an integrated approach for its management, different IPM components viz. three fungicides viz. Rovral 50 WP (Iprodione), Dithan M-45 (Mancozeb) and Score 250 EC (Difenconazol); two botanicals viz. Alamanda leaf extract (Allamanda cathartica) and Neem leaf extracts (Azadiracta indica); four soil amendments viz. Poultry manure, bioagent, saw dusts and micronutrients (Zn @ 0.45/L +B @ 2.5g/L) were evaluated under field condition. The experiment was conducted at the farm of Sher-e-Bangla Agricultural University, Dhaka, during 2011-2012. Pathogeninicity test indicated that Alternaria porri and Stemphylium vesicarium were the pathogens where S. vesicarium initiated the infection and A. porri facilitated the subsequent infection and made a complex form of disease. Among the chemical fungicides, Score 250 EC was found promising followed by Rovral 50 WP against purple blotch complex in terms of reduction of disease incidence and severity ultimately contributing to increased yield (134% and 129%, respectively) over control. Among botanicals, Alamanda leaf extract produced better result compared to neem leaf extract (99.6% and 67.6% respectively). In terms of increasing yield, poultry manure showed better performance (72.3%) followed by micronutrient (69.5%) and bioagent (58.2%). Bangladesh J. Agri. 2019-2021, 44-46: 31-44
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Claims 8
Claim · model-written summary
Stemphylium vesicarium initiated purple blotch infection in onion.
- Taxon
- onion
Allium cepat0 - Interactor
- S. vesicarium
.jpg?width=60)
Stemphylium vesicariume0pathogen - Outcome
- initiated the infectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“S. vesicarium initiated the infection”
t0“onion seed production”
Claim · model-written summary
Alternaria porri facilitated subsequent infection and the disease complex.
- Taxon
- onionAllium cepat0
- Interactor
- A. porri
.jpg?width=60)
Alternaria porrie0pathogen - Outcome
- facilitated the subsequent infectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“A. porri facilitated the subsequent infection and made a complex form of disease”
t0“onion seed production”
Claim · model-written summary
Score 250 EC reduced purple blotch and increased yield by 134% over control.
- Taxon
- onionAllium cepat0
- Treatment
- Score 250 ECe0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 134%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Score 250 EC was found promising followed by Rovral 50 WP against purple blotch complex in terms of reduction of disease incidence and severity ultimately contributing to increased yield (134% and 129%, respectively) over control”
t0“onion seed production”
Claim · model-written summary
Rovral 50 WP increased yield by 129% over control.
- Taxon
- onionAllium cepat0
- Treatment
- Rovral 50 WPe0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 129%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rovral 50 WP against purple blotch complex in terms of reduction of disease incidence and severity ultimately contributing to increased yield (134% and 129%, respectively) over control”
t0“onion seed production”
Claim · model-written summary
Alamanda leaf extract had a better result than neem leaf extract, 99.6% versus 67.6%.
- Taxon
- onionAllium cepat0
- Treatment
- Alamanda leaf extracte0
- Outcome
- better resulte0
- Direction
- bettere0
- Value
- 99.6%e0
- Qualifier
- 67.6%e0
- Comparator
- neem leaf extracte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alamanda leaf extract produced better result compared to neem leaf extract (99.6% and 67.6% respectively)”
t0“onion seed production”
Claim · model-written summary
Poultry manure increased yield by 72.3%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In terms of increasing yield, poultry manure showed better performance (72.3%) followed by micronutrient (69.5%) and bioagent (58.2%)”
t0“onion seed production”
Claim · model-written summary
Micronutrient increased yield by 69.5%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In terms of increasing yield, poultry manure showed better performance (72.3%) followed by micronutrient (69.5%) and bioagent (58.2%)”
t0“onion seed production”
Claim · model-written summary
Bioagent increased yield by 58.2%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In terms of increasing yield, poultry manure showed better performance (72.3%) followed by micronutrient (69.5%) and bioagent (58.2%)”
t0“onion seed production”
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