Disease prevalence and its impact on yield performance of tropical sugarbeet (Beta vulgaris L.) genotypes under Bangladesh conditions

Md Imam Hossain¹*, Md Shamsur Rahman ¹ , Md Jamal Uddin ²  and Md Omar Khaiyam¹ 

*¹Pathology Division, Bangladesh Sugarcrop Research Institute, Ishurdi-6620, Pabna, ²BSRI Sub-station Chuadanga-7200 

*Corresponding author: imam4all@gmail.com 

Article history: Received: 04.03.2021, Accepted: 28.04.2021, Published: Online: 30.04.2021

To cite this article: Hossain MI, Rahman MS, Uddin MJ and Khaiyam MO. 2021. Disease prevelence and its impact on yield performance of tropical sugarbeet (Beta vulgaris L.) genotypes under Bangladesh conditions. Intl. J. Agric. Med. Plants. 2(2): 1-7.

ABSTRACT 

Tropical sugarbeet is the most promising alternative sugarcrop in the tropical and subtropical regions. The study’s aim was to identify the major diseases that affect tropical sugarbeet growth and yield in Bangladesh. Fifteen tropical sugarbeet genotypes were seeded in the experimental field of the pathology division of BSRI, Ishurdi, Pabna, on November 10^th, 2016 in an RCBD design with three replications. All tropical sugarbeet genotypes demonstrated good field emergence, ranging from 82.91 to 93.33% at seven days after sowing (DAS). Sclerotium root rot, Rhizoctonia crown and root rot, Cercospora leaf spot, Alternaria leaf spot, and root knot were identified as major diseases and limiting factors for sugarbeet cultivation in Bangladesh. All tropical genotypes were infected by Sclerotium root rot, which varied from 5.83 to 35.83%, Rhizoctonia crown and root rot was 0-5%, Cercospora leaf spot was 10.83-23.75%, Alternaria leaf spot disease was 1.25 to 4.20%, and root knot was 0-0.83% disease incidence. Plant height ranged from 60.67 to 77.11 cm at 165 DAS. Similarly, root length differed from 18.60 to 24.00 cm, and root girth diameter varied from 78.38 to 96.77 mm. Individual beet weights differed between genotypes, ranging from 0.626 kg to 0.975 kg. The mean root yield across all the genotypes was 66.22 t/ha when harvested at 165 DAS. The genotypes SZ-35 (87.39 t/ha) and SV-889 (53.07 t/ha) produced the highest and lowest root yields at 165 DAS, respectively. The roots of genotypes SV-35 and SV-893 contained a relatively high amount of pol % beet, at 13.89% and 13.13%, respectively. All the genotypes had more than 11.3 % pol (%) beet and can be considered sugar-producing genotypes.

Keywords: Beta vulgaris, disease prevalence, sugarbeet, tropical, yield performance

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