Toxicity effect of Ricinus communis methanolic extracts against Bactrocera cucurbitae (Diptera: Tephritidae)

Sadia Manzoor, Rasheed Akbar, Afaq Hussain, Amjad Ali, Brekhna Faheem, Maid Zaman, Abid Farid, Ijaz Hussain, Imtiaz Ali Khan, Kahkashan Perveen, Najat A. Bukhari and Jianfan Sun
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Sadia Manzoor: Department of Entomology, Faculty of Physical and Applied Sciences, University of Haripur, Haripur Khyber Pakhtunkhwa, Pakistan
Rasheed Akbar: Department of Entomology, Faculty of Physical and Applied Sciences, University of Haripur, Haripur Khyber Pakhtunkhwa, Pakistan
Afaq Hussain: Department of Entomology, Faculty of Physical and Applied Sciences, University of Haripur, Haripur Khyber Pakhtunkhwa, Pakistan
Amjad Ali: Research School of Polymeric Materials, School of Materials and Science and Engineering, Jiangsu University, Zhenjiang, P. R China
Brekhna Faheem: Department of Zoology, Abdul Wali Khan University Mardan, Mardan, Pakistan
Maid Zaman: Department of Entomology, Faculty of Physical and Applied Sciences, University of Haripur, Haripur Khyber Pakhtunkhwa, Pakistan
Abid Farid: Department of Entomology, Faculty of Physical and Applied Sciences, University of Haripur, Haripur Khyber Pakhtunkhwa, Pakistan
Ijaz Hussain: Department of Horticulture, Faculty of Physical and Applied Sciences, University of Haripur, Haripur Khyber Pakhtunkhwa, Pakistan
Imtiaz Ali Khan: Department of Entomology, University of Agriculture Peshawar, Peshawar, Pakistan
Kahkashan Perveen: Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
Najat A. Bukhari: Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
Jianfan Sun: Institute of Environment and Ecology, School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, P. R China

Plant Protection Science, 2025, vol. 61, issue 1, 77-88

Abstract: Bactrocera cucurbitae, commonly known as the melon fruit fly, stands as a formidable threat to global agriculture, particularly in the cultivation of cucurbitaceous crops. The adaptability, high reproductive capacity, and broad host range of B. cucurbitae make it a persistent challenge for growers worldwide. Conventional control methods, often reliant on chemical pesticides, pose environmental and ecological concerns, necessitating the exploration of alternative strategies for sustainable pest management. Invasive plants often exert deleterious effects on ecosystems, and the castor bean plant, Ricinus communis, is no exception. To explore the efficacy of R. communis, a methanol extract was tested to find the toxicity effect against B. cucurbitae. In this study, different bioactive compounds were isolated from R. communis. The crude extract of R. communis was subjected to fractionating using different organic solvents in an increasing order of polarity, where the fraction indicating maximum activity was then taken for the isolation of the bioactive compounds using various chromatographic and spectroscopic techniques such as column chromatography, thin layer chromatography (TLC), gas chromatography-mass spectrometry (GC-MS). The concentrations of R. communis extracts at 0.5, 1.0, 1.5 and 2% methanol were used. Pure methanol was used as the control. The experimental conditions were maintained at 28 + 20 ºC and 65 + 5% relative humidity. The experiment was laid out in a complete randomised design having five replications. A probit analysis was used to find the LC50 and LC90. The results showed that, as the concentration of the plant extracts increases, the mortalities of B. cucurbitae also increased. After a 72 h exposure period, the crude extracts exhibited the lowest LC50 at 0.30% and LC90 at 0.60%. This study investigates the potential of methanolic extracts derived from various parts of R. communis to serve as a biopesticide against B. cucurbitae which can be easily available, economically feasible, socially acceptable and environmentally friendly.

Keywords: Bactrocera cucurbitae; Ricinus communis; isolation and purification (search for similar items in EconPapers)
Date: 2025
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DOI: 10.17221/46/2024-PPS

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