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RISS 인기검색어
- 검색키워드
- 저자 : Hafiz Azhar Ali KHAN (검색결과 4 건)
- 무료
- 기관 내 무료
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Toxicity of seventeen insecticides to Camponotus sericeus (Hymenoptera: Formicidae)
Khan Hafiz Azhar Ali,Zafar Rabia,Nasir Iqra 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.1
The success of chemical control depends on toxicity of insecticides against insect pests. Camponotus sericeus is an important urban pest with the ability to cause substantial damage to wooden structures, but there is a lack of information on toxicity of insecticides against C. sericeus. To determine the insecticide toxicity, workers of C. sericeus were exposed to 17 insecticides from different classes: carbamate (methomyl, bendiocarb), organo phosphate (chlorpyrifos, profenofos, temephos), pyrethroid (bifenthrin, deltamethrin, permethrin), neon icotinoid (acetamiprid, imidacloprid, thiamethoxam), avermectin (abamectin, emamectin), pyrrole (chlorfenapyr), phenylpyrazole (fipronil), and spinosyn (spinosad and spinetoram), via residual bioassay method. The LC 50 ranged from: 0.15 to 0.20 µg/vial for carbamates, 0.09 to 0.27 µg/vial for organophosphates, 0.09 to 0.44 µg/vial for pyrethroids, 0.02 to 0.67 µg/vial for neonicotinoids, 0.54 to 0.82 µg/vial for avermectins, 0.78 µg/vial for pyrrole, 0.62 µg/vial for phenylpyrazole, and 1.96 to 2.05 µg/vial for spinosyns. Overall, acetamiprid was the most toxic one among the tested insecticides followed by permethrin, temephos, profenofos, bendiocarb and methomyl, while spinosad and spinetoram were the least toxic insecticides. Considering the potential toxicity of different insecticides against C. sericeus, future studies could investigate the practical application of these insecticides in order to design an effective management plan.
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Khan Hafiz Azhar Ali 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.1
Essential oils from plants may provide environment-friendly alternatives to conventional synthetic insecticides. Here, toxic, repellent, and oviposition deterrent effects of essential oils of six plants: Allium sativum L. (Alliaceae), Azadirachta indica A. Juss. (Meliaceae), Cinnamomum cassia (L.) (Lauraceae), Eucalyptus camaldulensis Dehnh. (Myrtaceae), Piper nigrum L. (Piperaceae), and Thevetia peruviana (Pers.) (Apocynaceae), were evaluated against different life stages of Musca domestica. Bioassays revealed that the essential oils of A. indica, T. peruviana and E. camaldulensis exhibited: a) the highest toxicity on larvae (LC 50 = 169.72, 182.23 and 277.01 ppm, respectively), pupae (LC 50 = 150.56, 164.84 and 164.87 ppm, respectively) and adults (LC 50 = 166.69, 139.15 and 302.75 ppm, respectively) of M. domestica; b) the highest repellency (91.44, 72.19 and 72.80%, respectively) and oviposition deterrent (90.36, 88.82 and 89.13%, respectively) effects on adults of M. domestica, as compared to the other essential oils. Moreover, the speed of mortality caused by essential oils of A. indica (LT 50 = 16.85 and 17.06 h for larvae and adults, respectively) and T. peruviana (LT 50 = 16.46 and 18.58 h for larvae and adults, respectively) was faster than the rest of the essential oils. On the whole, it might be expected that the essential oils of A. indica, T. peruviana and E. camaldulensis could be developed into a new type of environment-friendly insecticides and/or repellents for the management of M. domestica.
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Toxic potential of some indigenous plant oils against the rice weevil, Sitophilus oryzae (Linnaeus)
Hafiz Azhar Ali KHAN,Waseem AKRAM,이수미,Taskeen AHMAD,Kamran MAQSOOD,Hassan Ali KHAN,Muhammad Waqas NAZIR,Muhammad Faisal JAVAID 한국곤충학회 2019 Entomological Research Vol.49 No.3
The present study was conducted to evaluate the toxic potential of five indigenous plant oils: black pepper (Piper nigrum), Chinese cinnamon (Cinnamomum cassia), garlic (Allium sativum), river red gum (Eucalyptus camaldulensis), and yellow oleander (Thevetia peruviana), against laboratory reared Sitophilus oryzae adults. The bioassays were done by the diet incorporation method with concentrations ranging from 50 ppm to 500 ppm. Based on lethal concentrations to kill 50% (LC50) of the subjected weevils, T. peruviana proved to be the most toxic having the lowest LC50 values, 414.58, 201.94, and 129.52 ppm, after 7, 14, and 21 days of exposure, respectively, followed by E. camaldulensis (475.51, 366.65, and 251.28 ppm, respectively). The rest of the plant oils also showed toxic potential, but these were less toxic compared with T. peruviana and E. camaldulensis. With respect to the time taken to cause 50% mortality (LT50) of the exposed weevils, T. peruviana had LT50 at 14.54 days followed by P. nigrum (22.09 days), E. camaldulensis (24.29 days), and C. cassia (28.71 days). Whereas, A. sativum took the longest time (44.47 days) to cause 50% mortality of the exposed weevils. In conclusion, the result revealed toxic potential of tested plant oils, and suggests further studies under simulated-field conditions should be included in the management plan for S. oryzae.
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Khan Hafiz Azhar Ali,Maqsood Sumaira,Mahmood Anas 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.2
Management of Musca domestica is desirable globally in order to manage public health issues. However, development of insecticide resistance is one of major hindrances in the management of M. domestica. Here, we explored toxicity of permethrin against larvae of laboratory and field strains of M. domestica, resistance com parison, synergistic effect of enzyme inhibitors on permethrin toxicity, and activities of metabolic enzymes in both strains. In case of the Lab-susceptible strain, LC 50 values of permethrin were 0.14, 0.52 and 0.94 µg g − 1 for first, second and third instars, respectively. In case of the field strain, LC 50 values were 28.09, 66.86 and 112.24 µg g − 1 for first, second and third instars, respectively. First, second and third instars of the field strain exhibited 200.64, 128.58 and 119.40 fold resistance to permethrin when compared with the first, second and third instars of the Lab-susceptible strain, respectively. Toxicity of permethrin in the field strain synergized in the presence of enzyme inhibitors (PBO or DEF). Enzyme analysis revealed significantly higher activities of MFO, CarE and GST in the field strain than those of the Lab-susceptible strain, suggesting metabolic-based mechanism of permethrin resistance. In conclusion, the field strain exhibited resistance to permethrin, which could be managed by adopting alternate measures for the management of M. domestica.
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