The Experts below are selected from a list of 1011 Experts worldwide ranked by ideXlab platform
Changlu Wang - One of the best experts on this subject based on the ideXlab platform.
-
effect of moisture on efficacy of selected insecticide Dusts against the common bed bug cimex lectularius hemiptera cimicidae
Journal of Economic Entomology, 2020Co-Authors: Sabita Ranabhat, Changlu WangAbstract:Insecticide Dust Formulations are considered as more effective for controlling the common bed bug, Cimex lectularius (L) (Hemiptera: Cimicidae), than residual sprays. Various environmental factors may affect the efficacy of insecticide Dusts. In this study, we evaluated the effect of moisture on the efficacy of three insecticide Dusts against C. lectularius. Moisture was created using two methods: applying steam to insecticide Dust-treated tiles and aging insecticide Dust-treated tiles in chambers with various levels of relative humidity (RH). In the steam treatment, three insecticides including Cimexa (92.1% amorphous silica gel), Alpine (0.25% dinotefuran, 95% diatomaceous earth), and Tempo (1% cyfluthrin) were evaluated. Exposure to steam significantly reduced the efficacy of all three insecticide Dusts. Among the three insecticides, the efficacy of Cimexa was significantly higher than Alpine and Tempo. In the different RH treatments, Cimexa treated tiles that were aged under different (52, 75, and 100%) RH conditions for 1 and 2 mo caused significantly lower mortality to C. lectularius than nonaged Cimexa. We conclude that both, a short period of exposure to steam and long-period aging in a moist environment, can significantly reduce the efficacy of insecticide Dusts. Moisture needs to be considered when applying insecticide Dusts for controlling bed bug infestations.
-
comparative efficacy of selected Dust insecticides for controlling cimex lectularius hemiptera cimicidae
Journal of Economic Entomology, 2016Co-Authors: Narinderpal Singh, Changlu Wang, Desen Wang, Richard Cooper, Chen ZhaAbstract:Bed bugs, Cimex lectularius L., are one of the most difficult urban pests to control. Pest management professionals rely heavily on insecticide sprays and Dusts to control bed bugs. Dust Formulations are considered to provide longer residual control than sprays. However, there are no scientific data available on the comparative efficacy of the commonly used insecticide Dusts. We evaluated the efficacy of eight insecticide Dust products using three exposure methods: 1) brief exposure-bed bugs crossed a 2.54-cm-wide Dust-treated band, 2) forced exposure-bed bugs were continuously exposed to a Dust-treated substrate, and 3) choice exposure-bed bugs were given a choice to stay on either Dust-treated or untreated substrate. The brief exposure method was the most sensitive in detecting the differences among the insecticides. Only CimeXa (silica gel) Dust caused 100% mortality from all three exposure methods. Other tested Dusts (1% cyfluthrin, 0.05% deltamethrin, 0.075% zeta-cypermethrin + 0.15% piperonyl butoxide, 1% pyrethrins, 1% 2-phenethyl propionate + 0.4% pyrethrin, 0.25% dinotefuran + 95% diatomaceous earth, 100% diatomaceous earth) caused ≤65% mortality in a brief exposure assay. We also evaluated the horizontal transfer effect of the silica gel Dust. Silica gel Dust-exposed bed bugs transferred the Dust horizontally to unexposed bed bugs resulting in 100% mortality at 4:6 donor: recipient ratio and 88.0 ± 5.0% mortality at 1:5 donor: recipient ratio. The results suggest silica gel is the most promising insecticide Dust for controlling C. lectularius.
Chen Zha - One of the best experts on this subject based on the ideXlab platform.
-
comparative efficacy of selected Dust insecticides for controlling cimex lectularius hemiptera cimicidae
Journal of Economic Entomology, 2016Co-Authors: Narinderpal Singh, Changlu Wang, Desen Wang, Richard Cooper, Chen ZhaAbstract:Bed bugs, Cimex lectularius L., are one of the most difficult urban pests to control. Pest management professionals rely heavily on insecticide sprays and Dusts to control bed bugs. Dust Formulations are considered to provide longer residual control than sprays. However, there are no scientific data available on the comparative efficacy of the commonly used insecticide Dusts. We evaluated the efficacy of eight insecticide Dust products using three exposure methods: 1) brief exposure-bed bugs crossed a 2.54-cm-wide Dust-treated band, 2) forced exposure-bed bugs were continuously exposed to a Dust-treated substrate, and 3) choice exposure-bed bugs were given a choice to stay on either Dust-treated or untreated substrate. The brief exposure method was the most sensitive in detecting the differences among the insecticides. Only CimeXa (silica gel) Dust caused 100% mortality from all three exposure methods. Other tested Dusts (1% cyfluthrin, 0.05% deltamethrin, 0.075% zeta-cypermethrin + 0.15% piperonyl butoxide, 1% pyrethrins, 1% 2-phenethyl propionate + 0.4% pyrethrin, 0.25% dinotefuran + 95% diatomaceous earth, 100% diatomaceous earth) caused ≤65% mortality in a brief exposure assay. We also evaluated the horizontal transfer effect of the silica gel Dust. Silica gel Dust-exposed bed bugs transferred the Dust horizontally to unexposed bed bugs resulting in 100% mortality at 4:6 donor: recipient ratio and 88.0 ± 5.0% mortality at 1:5 donor: recipient ratio. The results suggest silica gel is the most promising insecticide Dust for controlling C. lectularius.
Desen Wang - One of the best experts on this subject based on the ideXlab platform.
-
comparative efficacy of selected Dust insecticides for controlling cimex lectularius hemiptera cimicidae
Journal of Economic Entomology, 2016Co-Authors: Narinderpal Singh, Changlu Wang, Desen Wang, Richard Cooper, Chen ZhaAbstract:Bed bugs, Cimex lectularius L., are one of the most difficult urban pests to control. Pest management professionals rely heavily on insecticide sprays and Dusts to control bed bugs. Dust Formulations are considered to provide longer residual control than sprays. However, there are no scientific data available on the comparative efficacy of the commonly used insecticide Dusts. We evaluated the efficacy of eight insecticide Dust products using three exposure methods: 1) brief exposure-bed bugs crossed a 2.54-cm-wide Dust-treated band, 2) forced exposure-bed bugs were continuously exposed to a Dust-treated substrate, and 3) choice exposure-bed bugs were given a choice to stay on either Dust-treated or untreated substrate. The brief exposure method was the most sensitive in detecting the differences among the insecticides. Only CimeXa (silica gel) Dust caused 100% mortality from all three exposure methods. Other tested Dusts (1% cyfluthrin, 0.05% deltamethrin, 0.075% zeta-cypermethrin + 0.15% piperonyl butoxide, 1% pyrethrins, 1% 2-phenethyl propionate + 0.4% pyrethrin, 0.25% dinotefuran + 95% diatomaceous earth, 100% diatomaceous earth) caused ≤65% mortality in a brief exposure assay. We also evaluated the horizontal transfer effect of the silica gel Dust. Silica gel Dust-exposed bed bugs transferred the Dust horizontally to unexposed bed bugs resulting in 100% mortality at 4:6 donor: recipient ratio and 88.0 ± 5.0% mortality at 1:5 donor: recipient ratio. The results suggest silica gel is the most promising insecticide Dust for controlling C. lectularius.
Ahmed Mohamed El-bakry - One of the best experts on this subject based on the ideXlab platform.
-
Impact of Lavandula officinalis, inert Dusts and their Formulations on Sitophilus oryzae
Agricultural Engineering International: The CIGR Journal, 2018Co-Authors: Ahmed Mohamed El-bakryAbstract:The volatile oil ( Lavandula officinalis L.) and the inorganic compounds (inert Dusts), aluminum oxide, kaolin and silicon dioxide were screened individually and in Formulations against the rice weevil, Sitophilus oryzae . Aluminum oxide was the most potent with LC 50 value of 0.65 mg/cm 2 , followed by silicon dioxide with LC 50 value of 0.96 mg/cm 2 , while, kaolin gave LC 50 value of 9.29 mg/cm 2 . The cumulative mortality (0-50, 50-100, 100-150, 150-200, 200-250, 250-300 days) responses at exposure times of L. officinalis and the inert Dusts as well as the inert Dust Formulations at LC 50 concentrations against S. oryzae were investigated. Moreover, the number of the offspring after 50 days of each lifetime period was developed. L. officinalis had a short duration of toxicity, as the efficiency continued only for 2 days from exposure to the compound. Silicon dioxide alone or in formulation was the most powerful, it gave full control of S. oryzae adults after 7 days at four (0-50, 50-100, 100-150, 150-200 days) and five (0-50, 50-100, 100-150, 150-200, 200-250 days) lifetime periods, respectively, in the same trend, silicon dioxide alone or in formulation possessed 100% reduction of the offspring at five life time periods. Moreover, aluminum oxide alone or in formulation gave full control of the insect after 7 days of exposure until three lifetime periods of the compound. Likewise, the compound alone or in formulation, possessed 100% reduction of the offspring at four lifetime periods. The Formulations of aluminum oxide and silicon dioxide were more efficient than the compounds treated alone, where the effectiveness increased nearly two times, after 2 days from exposure at first 50 days lifetime period. Likewise, kaolin formulation was more effective than kaolin alone in the same lifetime period.
Christos G Athanassiou - One of the best experts on this subject based on the ideXlab platform.
-
assessment of different inert Dust Formulations for the control of sitophilus oryzae tribolium confusum and aphis fabae
Crop Protection, 2020Co-Authors: Sofia Faliagka, Paraskevi Agrafioti, Evagelia Lampiri, N Katsoulas, Christos G AthanassiouAbstract:Abstract The necessity to ensure the quality of food by simultaneously reducing the environmental footprint due to the extensive use of convectional insecticides has led to an increase in the efforts towards the development of non-chemical control strategies. Silicon dioxide is considered as a promising alternative active ingredient for the control of various arthropods in different crops and products. Silicon dioxide and the relative silicaceous materials (silica) are classified in the category of inert Dusts, which act on arthropods through contact leading to desiccation. In our study, we tested three different silica-based Dust Formulations, Sylobloc® S200, Syloid® ED3 and Syloid® ED5 in order to evaluate their pest control efficacy. As target species, we used, in laboratory bioassays, a field/greenhouse pest the aphid Aphis fabae and the stored-product pests Tribolium confusum and Sitophilus oryzae. These species were exposed to the aforementioned Dusts under three different doses (0, 12.5, 25.0 mg/petri) and different time intervals. Taking into account the exposure time of the above species to the inert Dusts, S. oryzae adults and T. confusum larvae were more susceptible to ED5 at 25.0 and 12.5 mg, respectively, while A. fabae adults to S200 at the highest tested dose, since less time was needed in order to achieve the highest mortality. Sitophilus oryzae and T. confusum mortality was increased to 90% after the 7th day of post exposure period to all Dust Formulations, while the highest mortality levels of A. fabae were recorded after 1 day of post exposure to S200. The results of this study show that these silicon Dust Formulations are effective to greenhouse and storage insect control and can be further exploited through various uses, e.g. in insect-proof nets to minimize the pest invasions in greenhouses.
