Research Article
Nematicidal Potential of Neem (Azadirachta indica A. Juss) Based Products Against Root-knot Nematode (Meloidogyne incognita) and Yield Enhancement in Tomato
Iqbal Faruk*,
Shamim Akhter,
Rummana Islam,
Ferdous-E-Elahi,
Tasfia Hassan Tabassum,
Alamgir Siddiky
Issue:
Volume 1, Issue 3, September 2026
Pages:
101-110
Received:
15 October 2025
Accepted:
5 November 2025
Published:
10 August 2026
DOI:
10.11648/j.sdf.20260103.11
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Abstract: Root-knot nematode (Meloidogyne incognita) is one of the most destructive soil-borne pathogens that severely affect tomato (Solanum lycopersicum L.) production worldwide including Bangladesh, causing significant yield losses. The present study was conducted to evaluate the nematicidal potential of neem (Azadirachta indica A. Juss) based products for the management of M. incognita and their effects on tomato growth and yield under both pot culture and field conditions during 2017-18, 2018-19, 2019-20 and 2020-21 cropping seas. Different neem formulations, including neem seed extract, neem leaf extract, neem oil, and commercial neem cake, were applied artificial root knot nematode infested soil amendment. In pot house condition, all neem based product was effective against root knot nematode and increased plant growth parameters. In the field condition, results revealed that all neem products significantly reduced root-knot gall index, and increased plant growth parameters such as shoot and root growth as well as fruit number and yield of tomato compared to the untreated control. Among the tested treatments, neem oil cake and neem seed extract treatment exhibited the best nematicidal activity, with a reduction in gall index and remarkable improvement in plant height, shoot weight, root weight, fruit number, and total yield of tomato. Neem leaf extract, neem leaf powder and chemical nematicide Furadan 5G treatments also performed better in reduction of gall index, improving plant growth and yield of tomato compared to untreated control. These findings suggest that neem-based products, particularly neem oil cake and neem seed extract, are effective, eco-friendly alternatives to synthetic nematicides for sustainable root-knot nematode management and yield improvement in tomato production systems.
Abstract: Root-knot nematode (Meloidogyne incognita) is one of the most destructive soil-borne pathogens that severely affect tomato (Solanum lycopersicum L.) production worldwide including Bangladesh, causing significant yield losses. The present study was conducted to evaluate the nematicidal potential of neem (Azadirachta indica A. Juss) based products fo...
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Research Article
Assessing Climate Change Impacts on Coffee Production in Hai District, Tanzania: Evidence from Climate Data and Smallholder Farmers
Aden Mbuba*
,
Domic Lameck
Issue:
Volume 1, Issue 3, September 2026
Pages:
111-116
Received:
23 April 2026
Accepted:
17 July 2026
Published:
10 August 2026
DOI:
10.11648/j.sdf.20260103.12
Downloads:
Views:
Abstract: A study investigated the impact of climate change on coffee production on the slopes of Mt. Kilimanjaro by analyzing climatic and yield data trends over 30 years from 1989 to 2018. Meteorological data, including rainfall and temperature, were extracted from the Lyamungu meteorological station. Data on yield were collected through questionnaires, interviews, and focus group discussions with the farmer. Furthermore, data analysis was performed using SPSS version 12.0 and COSATAT for regression analysis, the results showed that total rainfall distribution remained relatively stable, though there were slight changes in trends, with long rain peaks becoming steeper. The mean maximum temperature exhibited significant variation over the years, averaging around 25°C, which is still within the optimal range for coffee cultivation. Notably, the temperature in 1997 deviated most from the mean, rising by almost 1°C. Despite these climatic fluctuations, coffee yield trends were not significantly affected. The study suggests that coffee production in Machame Mashariki ward has not yet been severely impacted by climate change. However, it recommends adaptive strategies such as mulching, trickle irrigation, and rainwater harvesting to mitigate potential future effects. This comprehensive assessment provides valuable insights into the resilience of coffee production to climatic variations on the slopes of Mt. Kilimanjaro.
Abstract: A study investigated the impact of climate change on coffee production on the slopes of Mt. Kilimanjaro by analyzing climatic and yield data trends over 30 years from 1989 to 2018. Meteorological data, including rainfall and temperature, were extracted from the Lyamungu meteorological station. Data on yield were collected through questionnaires, in...
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