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Author

A. Adekiya

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Open access Aug 2026

Performance, fruit quality, and shelf life of tomato (Solanum lycopersicum) grown using charred and uncharred eggshells

Despite its widespread cultivation, challenges persist in producing tomato fruits with high quality and extended shelf life. This study focuses on the potential of eggshells as a sustainable soil amendment. The experiment was carried out to determine the growth, photosynthetic pigment concentrations, yield, shelf life, and fruit quality of tomato grown using charred eggshells (CEG) and uncharred eggshells (UCEG) (amendment) on two different soil types. The research was conducted over two cropping seasons (2022 and 2023) at Landmark University, Omu-Aran, Nigeria. Two soil types (Site A: sandy loam; Site B: sandy) were used to test the efficacy of the amendments. Ground eggshells, in both CEG and UCEG forms, were applied individually at the following concentrations: 25, 50, 75, and 100%, and in combination with each other. Standard rate (2.5 t ha −1 ) of calcium carbonate (CaCO 3 ) was applied as a check. Data on the vegetative, yield, and fruit shelf life quality were collected and subjected to analysis of variance (ANOVA) using the GENSTAT Discovery Software, Edition 4. CEG 100% had significantly ( p  ≤ 0.05) higher chlorophyll content (70.39 mg m 2 ), number of fruits (138.56), and yield (9,595.84 kg ha −1 ), while UCEG 100% had the least chlorophyll content (15.24 mg m 2 ), number of fruits (71.59), and yield (5,286.52 kg ha −1 ). Combined application of CEG 75% + UCEG 25% significantly increased the shelf life (21 days) compared to the control, which had the least number of days (9.0 days). Application of CEG 75% + UCEG 25% increased the lycopene content (1.96 mg g −1 ), vitamin A (2.24 mg g −1 ), and N, P, K, Ca, and Mg of the fruits. Tomato plants in Site A performed better than those in Site B for all the parameters tested in both years. Results of this study indicated that using CEG 75% and CEG 75% + UCEG 25% significantly improved tomato yield and shelf life. Eggshells are a low-cost, easily accessible agricultural waste product; therefore, the application of CEG 75% alone and the combined application of CEG 75% + UCEG 25% may be considered economical and environmentally friendly for tomato production.

F. Okunlola, C. Aboyeji, A. Adekiya et al. · 0 citations
Open access Jun 2026

Screening of Tomato (Solanum lycopersicum L.) Genotypes for Tolerance to Bacterial Wilt Caused by Ralstonia solanacearum Under Screenhouse Conditions

Bacterial wilt caused by Ralstonia solanacearum is one of the most destructive soil-borne diseases limiting tomato production in tropical regions. The identification of tolerant genotypes remains the most sustainable strategy for managing the disease, particularly in endemic zones of South-Western Nigeria. This study evaluated eleven tomato (Solanum lycopersicum L.) genotypes comprising seven NIHORT accessions, one commercial hybrid (F1 Cobra 26), and three local varieties for tolerance to bacterial wilt under controlled screenhouse conditions. The experiment was arranged in a 2 × 11 factorial and laid out in a Randomized Complete Block Design (RCBD) with three replicates. Plants were artificially inoculated using a standardized bacterial suspension adjusted to 2 × 10⁹ CFU ml⁻¹. Disease incidence was calculated as a percentage of symptomatic plants per genotype. Significant differences (p < 0.05) were observed among genotypes for disease incidence and wilting severity. Disease incidence ranged from 16.0% in F1 Cobra 26 to 53.4% in NHTO 0199 under inoculated conditions, with susceptible genotypes exhibiting severe wilting symptoms. On the other hand, selected NIHORT accessions demonstrated comparatively lower disease severity and delayed symptom expression, indicating partial tolerance to R. solanacearum. The findings reveal substantial genetic variability in response to bacterial wilt and highlight the potential of specific improved accessions as candidate materials for breeding and cultivation in wilt-endemic regions. Adoption of tolerant genotypes is strongly recommended as a core component of integrated bacterial wilt management strategies.

A. O. Oloniluyi, V. Esan, A. Adekiya · 0 citations