Malik Najam-ul-Hassan

Bio: Malik Najam-ul-Hassan is an academic researcher. The author has contributed to research in topics: Ammi & Trachyspermum ammi. The author has an hindex of 2, co-authored 3 publications receiving 23 citations.

Repellent effects of selected medicinal plant extracts against Rust-Red Flour Beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae)

Abstract: Acetone based plant extracts of Nigella sativa, Syzygium aromaticum and Trachyspermum ammi was assessed against the stored pest of processed commodities, Tribolium castaneum. Periodic analysis for the repellence, by impregnating half-filter paper disc and at various concentrations (5, 10, 15%), was done. Trials showed significant repellent effects as T. ammi (76.67%) followed by S. aromaticum (76.54%) and N. sativa (64.32%). Overall, the T. ammi extracts were proved to be more repellent followed by S. aromaticum and N. sativa. Results suggest a safer potential of these natural extracts toward disturbing the biology and invasion of stored product pest, T. castaneum. Results also indicate a definite potential of these extracts towards incorporation of these extracts in pest management programs and towards optimizing food security through utilizing them as bio-pesticides.

Bioactivity of Nigella sativa, Syzygium aromaticum and Trachyspermum ammi extracts against Tribolium castaneum (Herbst.) (Coleoptera: Tenebrionidae)

Abstract: Acetone based plant extracts of Nigella sativa, Syzygium aromaticum and Trachyspermum ammi was assessed against the stored insect pest of processed commodities, Tribolium castaneum. Seed extracts of N. sativa and T. ammi and flower bud extracts of S. aromaticum were utilized for their contact toxicity against the stored beetle adults. Periodic analysis for the contact toxicity, by impregnating filter paper discs and at various concentrations, revealed a significant effect of these extracts on biology of stored product beetle pest, as T. ammi (7.17%) unveiled greater knock down effects followed by S. aromaticum (7.00%) and N. sativa (3.56%), respectively. Fallouts suggest a safer potential of these natural extracts toward disturbing the biology and invasion of stored product pest, T. castaneum. Effects indicate a definite potential of these extracts through their utilization as bio-pesticides towards optimizing food storage.

Potentiality of botanical agents for the management of post harvest insects of maize: a review.

Abstract: Natural products derived from plants are emerging as potent biorational alternatives to synthetic insecticides for the integrated management of post harvest insects of maize. In this paper, effectiveness of botanicals including plant extracts, essential oils, their isolated pure compounds, plant based nano formulations and their mode of action against storage insects have been reviewed with special reference to maize. Plant based insecticides found to be the most promising means of controlling storage insects of maize in an eco friendly and sustainable manner. This article also throws light on the commercialization of botanicals, their limitations, challenges and future trends of storage insect management.

Efficacy of Nigella Sativa (Ranunculaceae) Extracts on Adult Performance and Phase Transition of the Desert Locust Schistocerca gregaria (Orthoptera: Acrididae)

Abstract: The current work was carried out to investigate the effects of methanolic, petroleum ether and nbutanol extracts (30.0, 15.0, 7.5, 3.7 and 1.8%) of Nigella sativa seeds on several parameters of the adult performance and phase transition of Schistocerca gregaria. The n-butanol extract exhibited the most potent adulticidal activity followed with petroleum ether and methanolic extract, respectively, after treatment of penultimate (4) instar nymphs. After treatment of last (5) instar nymphs, methanolic extract exhibited the least adulticidal activity. Also, treatment of penultimate instar nymphs with N. sativa extracts resulted in blocked adult emergence in a dose-dependent course. Whereas no effect was exhibited by n-butanol extract on adult emergence after treatment of last instar nymphs, various degrees of restrained process was determined at some concentrations of other extracts. All N. sativa extracts (only at the higher two concentrations) caused adult deformities after treatment of the penultimate instar nymphs. After treatment of the last instar nymphs, nbutanol extract halted the adult morphogenesis only at the higher two concentrations but other extracts impaired it at all concentrations. In connection with the phase transition, treatment of penultimate instar nymphs with n-butanol extract (at 15.0 %) resulted in a solitarious tendency of S. gregaria adults as appeared with deeply green colour. The ovarian maturation in adult females was pronouncedly or slightly prohibited by N. sativa extracts during prolonged duration, depending on the concentration. Also, the reproductive life-time (oviposition period) was affected. Total adult longevity was shortened or prolonged, i.e. adult aging was accelerated or delayed, depending on extracts, concentration level and time of treatment.