Cuminum cyminum methanolic extract – Fe3O4 nanocomposite: A novel and efficient insecticide against the potato tuber moth (Lepidoptera: Gelechiidae) to protect potatoes
F. Khorrami, K. O. Aghbash, A. Soleymanzade, M. Forouzan, Y. Ghosta
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引用次数: 2
Abstract
Phthorimaea operculella is a significant insect pest of cultivated potatoes in tropical and subtropi- cal regions such as Iran. Since the potato is one of the most valuable sources of human food, non-chemical control of potato pests is essential. Application of medicinal plant extracts is a low-risk alternative method to synthetic chemical insecticides. Hence, the present study was conducted to investigate a potential strategy to improve the insecticidal activity of plant extracts for efficient management of P. operculella . The insecti- cidal efficacy of pure methanolic extract (PME) and Fe 3 O 4 @methanolic extract (FME) of Cuminum cyminum were evaluated against the potato tuber moth under laboratory conditions. The morphological characteristics of Fe 3 O 4 @Cumin were investigated by scanning electron microscope. Magnetic properties of the samples were determined using a vibration sample magnetometer. XRD was used to prove the crystalline structure of Fe 3 O 4 @Cumin. SEM, FTIR, XRD, and VSM analyses confirmed that the methanolic extract was loaded on Fe 3 O 4 . The toxicity of PME and Fe 3 O 4 @Cumin were evaluated on one-day-old eggs and penetration the first instar larvae of P. operculella into potato tubers and leaves. The LC 50 values of Cumin extract and Fe 3 O 4 @ Cumin were 961.07 and 601.48 and 496.84 and 268.82 ppm for penetrating neonate larvae to tubers and leaves, and 874.90 and 595.16 ppm for eggs, respectively. Bioassays revealed that Fe 3 O 4 @Cumin was more toxic than non-formulated Cumin methanolic extract against eggs and neonate larvae of P. operculella . The formulated methanolic extract was significantly more repellent against the pest. Our results suggested that the prepared nanocomposite could be used as a new effective tool for P. operculella management strategies to protect potatoes.
期刊介绍:
The journal publishes papers on the infectious diseases of plants, damages caused by insects and deals with the basic aspects of chemical and biological protection. Within its field of interest additional topics such as resistance against plant diseases, and physiological, biochemical and molecular questions of plant resistance and susceptibility are also discussed. Publishes book reviews and advertisements.