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Karamoko Diarra - One of the best experts on this subject based on the ideXlab platform.
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insecticide resistance in field populations of the tomato Fruitworm helicoverpa armigera from senegal
International Journal of Biological and Chemical Sciences, 2020Co-Authors: Serigne Omar Sene, Etienne Tendeng, Mamadou Diatte, Serigne Sylla, Babacar Labou, Amadou Woory Diallo, Karamoko DiarraAbstract:Monitoring of the evolution of insecticide resistance in the field is crucial to prevent pest control issues. The present study was conducted to assess insecticide resistance status of the Fruitworm, Helicoverpa armigera (Hubner) (Lepidoptera, Noctuidae), the most destructive pest of field-grown tomato in Senegal. A sample of 11- 15 field populations were monitored for their susceptibility to abamectin, deltamethrin, and profenofos, using a standard leaf-dip bioassay method. Resistance ratios ranged from 1- to 30-fold to abamectin (4/15 populations with RR>10), 7- to 112-fold to deltamethrin (11/12 populations with RR>10), and 1- to 29-fold to profenofos (3/11 populations with RR>10). This indicates that resistance evolution to deltamethrin was widespread among field populations of H. armigera. However, an increasing trend of resistance to deltamethrin was observed from the South to the North of Niayes. Susceptibility to abamectin and profenofos was generally high but showed that resistance might be evolving within some populations. In addition, signs of cross-resistance to abamectin were detected, suggesting possible metabolic resistance mechanisms already selected in pyrethroid-resistant populations. The recorded high levels of pyrethroids resistance are a concern for the control of H. armigera in Senegal as the country is being currently embarking into economic expansion of tomato cropping systems. © 2020 International Formulae Group. All rights reserved. Keywords: Insecticide resistance, pyrethroids, avermectins, OPs, Helicoverpa armigera, West Africa
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parasitoid control of the tomato Fruitworm helicoverpa armigera in smallholder farmer fields in senegal
International Journal of Pest Management, 2018Co-Authors: Mamadou Diatte, Thierry Brevault, Dienaba Sallsy, Karamoko DiarraAbstract:ABSTRACTIn Africa, Helicoverpa armigera (Hubner) (Lepidoptera, Noctuidae) is a key pest of cotton and vegetable crops, particularly tomato. Alternatives to insecticides to control this pest are needed such as conservation biological control. However, knowledge on the diversity and ecology of naturally occurring enemies of H. armigera is limited. A two-year field survey was conducted in a set of tomato farmer fields in the main vegetable-growing area in Senegal (Niayes) to assess the spatial and seasonal occurrence of indigenous parasitoids of H. armigera, and to evaluate the effect of insecticide use on biological control efficiency. No parasitoid emerged from H. armigera eggs. Incidence of larval parasitoids was generally moderate (20%) but highly variable (0%–100%) among fields, independently of host abundance, and negatively affected by the number of insecticide applications. Larval parasitism was largely dominated by the larval parasitoid Meteorus laphygmarum Brues (Hymenoptera, Braconidae), but a pos...
Christelle Guédot - One of the best experts on this subject based on the ideXlab platform.
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Development of Sparganothis sulfureana (Lepidoptera: Tortricidae) on Cranberry Cultivars
Insects, 2018Co-Authors: Erin E. Mcmahan, Christelle GuédotAbstract:Sparganothis Fruitworm (Sparganothis sulfureana Clemens) (Lepidoptera: Tortricidae) is a serious pest of cranberry (Vaccinium macrocarpon Aiton), a native North American fruit cultivated in northern regions of the United States and southeastern Canada. This study assessed antibiosis in several cranberry cultivars commonly grown in Wisconsin. Five cultivars previously shown to host different levels of populations of S. sulfureana in commercial cranberry were assessed in this study to evaluate the performance of S. sulfureana amongst these cultivars. We measured growth and time to developmental stages of newly emerged larvae to adulthood on selected cranberry cultivars in the laboratory. There was no difference in the rates of survival to pupation and to adult emergence among any of the cultivars tested. Mid-instar larvae that fed on the cultivar ‘Ben Lear’ were heavier than those feeding on ‘GH-1’, ‘Stevens’, or ‘HyRed’, and larvae that fed on ‘Mullica Queen’ were heavier than those feeding on ‘HyRed’. However, there were no significant differences in pupal weights or in the number of days from neonate to adult emergence among varieties. Therefore, this study did not provide evidence of antibiosis among the cultivars tested, and found that larval weight was not correlated with other measurements of performance.
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Flight Synchrony among the Major Moth Pests of Cranberries in the Upper Midwest, USA
Insects, 2017Co-Authors: Shawn A. Steffan, Elissa M. Chasen, Merritt E. Singleton, Jayne Sojka, Annie E. Deutsch, Juan Zalapa, Christelle GuédotAbstract:The cranberry Fruitworm (Acrobasis vaccinii Riley), sparganothis Fruitworm (Sparganothis sulfureana Clemens), and blackheaded fireworm (Rhopobota naevana Hubner) are historically significant pests of cranberries (Vaccinium macrocarpon Aiton) in the Upper Midwest (Wisconsin), USA. Their respective natural histories are well documented but correlations between developmental benchmarks (e.g., larval eclosion) and degree-day accruals are not yet known. Treatment timings are critical to the optimization of any given control tactic, and degree-day accrual facilitates optimization by quantifying the developmental status of pest populations. When key developmental benchmarks in the pest life cycle are linked to degree-days, real-time weather data can be used to predict precise treatment timings. Here, we provide the degree-day accumulations associated with discrete biological events (i.e., initiation of flight and peak flight) for the three most consistent moth pests of cranberries in Wisconsin. Moths were trapped each spring and summer from 2003 to 2011. To characterize flight dynamics and average timing of flight initiation, pheromone-baited trap-catch data were tallied for all three pest species within each of seven growing seasons. These flight dynamics were then associated with the corresponding degree-day accumulations generated using the cranberry plant’s developmental thresholds. Finally, models were fit to the data in order to determine the peak flight of each species. The initiation of the spring flight among all three moth species was highly synchronous, aiding in the timing of control tactics; however, there were substantial differences in the timing of peak flight among the moth species. Characterization of the relationship between temperature and pest development allows pest management professionals to target specific life stages, improving the efficacy of any given pest control tactic.
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Population Densities of Lepidopteran Pests in Selected Cranberry Cultivars in Wisconsin
Journal of Economic Entomology, 2016Co-Authors: Erin E. Mcmahan, Shawn A. Steffan, Christelle GuédotAbstract:: Host plant resistance, an important strategy of integrated pest management, was examined in the American cranberry, Vaccinium macrocarpon Aiton (Ericaceae). Despite the pressure on cranberry growers to reduce pesticide usage, host plant resistance is not used to help manage insect populations. This study measured field population densities of the three most economically important pest insects in Wisconsin, namely, cranberry Fruitworm (Acrobasis vaccinii Riley), sparganothis Fruitworm (Sparganothis sulfureana Clemens), and blackheaded fireworm (Rhopobota naevana Hubner), in five different cranberry cultivars, i.e., 'Stevens', 'Ben Lear', 'GH1', 'Mullica Queen', and 'HyRed'. Population densities of male moths of all three species were assessed using pheromone traps in beds of the different cranberry cultivars in commercial marshes in central Wisconsin. For each cultivar, damaged cranberries were collected, and the number of damaged berries and the number of larvae feeding within berries were compared among cultivars. More than 99% of larvae collected were cranberry Fruitworm. Mullica Queen and Ben Lear had more damaged berries than Stevens or GH1, and had more larvae than GH1. Conversely, fewer adult male sparganothis Fruitworm were found in Ben Lear and Mullica Queen beds than in beds of Stevens or GH1. Adult populations of cranberry Fruitworm and blackheaded fireworm were not different among cultivars. Our findings provide evidence of different levels of resistance in common cranberry cultivars, which should inform future plantings and breeding programs.
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Evaluation of Foliar Insecticides and the Addition of an Adjuvant for the Control of Cranberry Fruitworm and Sparganothis Fruitworm in Cranberry, 2015: Table 1
Arthropod Management Tests, 2016Co-Authors: Christelle Guédot, R. S. PerryAbstract:The objective of this experiment was to assess the efficacy of insecticides currently labeled for use on cranberry (Altacor, Delegate, Intrepid, Confirm), softer chemistry insecticides labeled on cranberry (Grandevo and Venerate), and insecticides not currently labeled on cranberry (cyclaniliprole, Fanfare, and Exirel). Selected insecticides were applied with and without the addition of the non-ionic adjuvant Apsa (spreader/activator) on first generation CFW and SFW eggs and early instar larvae. This experiment was conducted in a 4-yr-old cranberry planting on a commercial farm near Plainfield, WI. The trial consisted of 17 main effect treatments arranged in a complete randomized block design with 4 experimental replicates. Each …
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Evaluation of the Addition of an Adjuvant on Foliar Insecticides for the Control of Cranberry Fruitworm and Sparganothis Fruitworm in Cranberry, 2014
Arthropod Management Tests, 2015Co-Authors: Christelle Guédot, R. S. PerryAbstract:The objective of this experiment was to assess the efficacy of insecticides currently labeled for use in cranberry (Altacor, Delegate, Intrepid, Confirm), softer chemistry insecticides labeled on cranberry (Grandevo and Venerate), and an insecticide not currently labeled on cranberry (Exirel) in combination with the adjuvant Bond (spreader/sticker) on first generation CFW and SFW eggs and larvae. This experiment was conducted in a mature cranberry planting on a commercial farm near Warrens, Wisconsin. The trial consisted of 14 main effect treatments arranged in an RCB design with four experimental replicates. Each …
Mamadou Diatte - One of the best experts on this subject based on the ideXlab platform.
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insecticide resistance in field populations of the tomato Fruitworm helicoverpa armigera from senegal
International Journal of Biological and Chemical Sciences, 2020Co-Authors: Serigne Omar Sene, Etienne Tendeng, Mamadou Diatte, Serigne Sylla, Babacar Labou, Amadou Woory Diallo, Karamoko DiarraAbstract:Monitoring of the evolution of insecticide resistance in the field is crucial to prevent pest control issues. The present study was conducted to assess insecticide resistance status of the Fruitworm, Helicoverpa armigera (Hubner) (Lepidoptera, Noctuidae), the most destructive pest of field-grown tomato in Senegal. A sample of 11- 15 field populations were monitored for their susceptibility to abamectin, deltamethrin, and profenofos, using a standard leaf-dip bioassay method. Resistance ratios ranged from 1- to 30-fold to abamectin (4/15 populations with RR>10), 7- to 112-fold to deltamethrin (11/12 populations with RR>10), and 1- to 29-fold to profenofos (3/11 populations with RR>10). This indicates that resistance evolution to deltamethrin was widespread among field populations of H. armigera. However, an increasing trend of resistance to deltamethrin was observed from the South to the North of Niayes. Susceptibility to abamectin and profenofos was generally high but showed that resistance might be evolving within some populations. In addition, signs of cross-resistance to abamectin were detected, suggesting possible metabolic resistance mechanisms already selected in pyrethroid-resistant populations. The recorded high levels of pyrethroids resistance are a concern for the control of H. armigera in Senegal as the country is being currently embarking into economic expansion of tomato cropping systems. © 2020 International Formulae Group. All rights reserved. Keywords: Insecticide resistance, pyrethroids, avermectins, OPs, Helicoverpa armigera, West Africa
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parasitoid control of the tomato Fruitworm helicoverpa armigera in smallholder farmer fields in senegal
International Journal of Pest Management, 2018Co-Authors: Mamadou Diatte, Thierry Brevault, Dienaba Sallsy, Karamoko DiarraAbstract:ABSTRACTIn Africa, Helicoverpa armigera (Hubner) (Lepidoptera, Noctuidae) is a key pest of cotton and vegetable crops, particularly tomato. Alternatives to insecticides to control this pest are needed such as conservation biological control. However, knowledge on the diversity and ecology of naturally occurring enemies of H. armigera is limited. A two-year field survey was conducted in a set of tomato farmer fields in the main vegetable-growing area in Senegal (Niayes) to assess the spatial and seasonal occurrence of indigenous parasitoids of H. armigera, and to evaluate the effect of insecticide use on biological control efficiency. No parasitoid emerged from H. armigera eggs. Incidence of larval parasitoids was generally moderate (20%) but highly variable (0%–100%) among fields, independently of host abundance, and negatively affected by the number of insecticide applications. Larval parasitism was largely dominated by the larval parasitoid Meteorus laphygmarum Brues (Hymenoptera, Braconidae), but a pos...
Rufus Isaacs - One of the best experts on this subject based on the ideXlab platform.
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control of cranberry Fruitworm in blueberry 2014
Arthropod Management Tests, 2015Co-Authors: John C Wise, Anthony H Vanwoerkom, Rufus IsaacsAbstract:The objective of this trial was to test the efficacy of various insecticide programs to limit CBFW infestation in blueberry clusters. The test materials were applied to mature “Jersey” blueberry bushes (6 by 12 ft spacing) at the Felker Farm (1 mile South of Trevor …
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exploring host associated differentiation in the north american native cranberry Fruitworm acrobasis vaccinii from blueberries and cranberries
Entomologia Experimentalis Et Applicata, 2014Co-Authors: Raul F Medina, Anne L. Averill, Rufus Isaacs, Zsofia Szendrei, Kyle Harrison, Edi A Malo, Cesar RodriguezsaonaAbstract:The factors explaining host-associated differentiation (HAD) have not yet been fully characterized, especially in agricultural systems. It is thought that certain characteristics within a system may increase the probability for HAD to occur. These characteristics include relatively long-standing evolutionary relationships between insects and their host plants, endophagy, and allochrony in host-plant phenologies. We assessed the status of these characteristics as well as the presence of HAD in the cranberry Fruitworm, Acrobasis vaccinii Riley (Lepidoptera: Pyralidae), a pest associated with blueberry and cranberry in eastern North America. We reveal the occurrence of two distinct populations of A. vaccinii that are allochronically isolated by the phenological stage of their respective host plants (cranberries or blueberries). Laboratory-reared A. vaccinii adults collected from blueberries emerge at least 1 week earlier than adults from cranberries and the antennal sensitivity of adults to host-plant volatiles differs between A. vaccinii collected from blueberry and cranberry. Despite finding characteristics indicative of HAD, we did not detect a genetic signature of HAD in A. vaccinii. These findings suggest that HAD may occur through behavioral and phenological mechanisms before there is sufficient genetic variation to be detected.
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blueberry vaccinium corymbosum l jersey control of cranberry Fruitworm and cherry Fruitworm 2011
2012Co-Authors: John C Wise, Ryan Vander Poppen, Rufus IsaacsAbstract:The objective of this trial was to test the efficacy of various insecticide programs for lepidopteron pests in blueberries. Two bush plots were established in a mature 'Rubel' blueberry planting (4 x 12 feet planting) at the Nye farm, located approximately 3 miles South West of Trevor Nichols Research Center in Fennville, MI. Treatment plots were replicated four times and arranged in a RCB design; with all plots separated by a minimum of one buffer bush. Treatments were applied as described in Table 1 using a tractor-mounted FMC 1029 airblast sprayer calibrated to deliver 50 gpa at 2.5 mph. No foliar maintenance products were applied to the test plots during the trial, or any herbicides to the ground. Fruit evaluations were conducted on 27 Jun, 5 Jul, and 12 Jul through a random evaluation of 100 blueberry fruit clusters per replication for internal feeder damage. CBFW / CFW data are presented as percentage of clusters infested per plot. Statistical analysis was conducted using ANOVA and means separation by Duncan’s New MRT at P = 0.05.
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activity of broad spectrum and reduced risk insecticides on various life stages of cranberry Fruitworm lepidoptera pyralidae in highbush blueberry
Journal of Economic Entomology, 2010Co-Authors: John C Wise, Ryan Vander Poppen, Paul E Jenkins, Rufus IsaacsAbstract:ABSTRACT Laboratory and semifield bioassays were conducted to determine the life-stage activity of insecticides for controlling cranberry Fruitworm, Acrobasis vaccinii Riley (Lepidoptera: Pyralidae), a key lepidopteran pest of highbush blueberry, Vaccinium corymbosum L. The organophosphates azinphosmethyl and phosmet, the pyrethroid esfenvalerate, and the carbamate methomyl were lethal to all life stages. The neonicotinoids thiacloprid and acetamiprid demonstrated strong larvicidal and ovicidal activity but were somewhat weaker adulticides than the conventional broad-spectrum compounds. Bacillus thuringiensis, indoxacarb, and emamectin benzoate were shown to control A. vacinii primarily through their larvicidal activity. Spinosad was toxic to all life stages, including eggs laid on top of residues and those that were treated topically, but larvicidal activity was short lived. The growth regulators pyriproxyfen and novaluron had strong ovicidal activity when eggs were laid on top of residues but had limite...
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susceptibility of highbush blueberry cultivars to cranberry Fruitworm and japanese beetle
International Journal of Fruit Science, 2009Co-Authors: Steven Van Timmeren, Rufus IsaacsAbstract:The susceptibility of ten highbush blueberry cultivars, Vaccinium corymbosum L., to infestation by two key insect pests was compared. Over 5 years of assessing infestation by cranberry Fruitworm, Acrobasis vaccinii (Riley), in a replicated field planting, “Duke” received the greatest infestation in 3 of the 6 years. Susceptibility of the 10 cultivars to Japanese beetle feeding was measured over 3 years in laboratory assays designed to measure relative feeding on fruit and foliage. “Brigitta” was the most susceptible cultivar to fruit feeding, while “Elliott” and “Legacy” were the least susceptible cultivars to foliage feeding. “Elliott” and “Legacy” also had the lowest level of Japanese beetle feeding on leaves of blueberry bushes in the field. These results suggest the presence of plant-based resistance to foliage and fruit feeding insect pests in some cultivars of V. corymbosum, which could be exploited within integrated pest management strategies.
Serigne Omar Sene - One of the best experts on this subject based on the ideXlab platform.
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insecticide resistance in field populations of the tomato Fruitworm helicoverpa armigera from senegal
International Journal of Biological and Chemical Sciences, 2020Co-Authors: Serigne Omar Sene, Etienne Tendeng, Mamadou Diatte, Serigne Sylla, Babacar Labou, Amadou Woory Diallo, Karamoko DiarraAbstract:Monitoring of the evolution of insecticide resistance in the field is crucial to prevent pest control issues. The present study was conducted to assess insecticide resistance status of the Fruitworm, Helicoverpa armigera (Hubner) (Lepidoptera, Noctuidae), the most destructive pest of field-grown tomato in Senegal. A sample of 11- 15 field populations were monitored for their susceptibility to abamectin, deltamethrin, and profenofos, using a standard leaf-dip bioassay method. Resistance ratios ranged from 1- to 30-fold to abamectin (4/15 populations with RR>10), 7- to 112-fold to deltamethrin (11/12 populations with RR>10), and 1- to 29-fold to profenofos (3/11 populations with RR>10). This indicates that resistance evolution to deltamethrin was widespread among field populations of H. armigera. However, an increasing trend of resistance to deltamethrin was observed from the South to the North of Niayes. Susceptibility to abamectin and profenofos was generally high but showed that resistance might be evolving within some populations. In addition, signs of cross-resistance to abamectin were detected, suggesting possible metabolic resistance mechanisms already selected in pyrethroid-resistant populations. The recorded high levels of pyrethroids resistance are a concern for the control of H. armigera in Senegal as the country is being currently embarking into economic expansion of tomato cropping systems. © 2020 International Formulae Group. All rights reserved. Keywords: Insecticide resistance, pyrethroids, avermectins, OPs, Helicoverpa armigera, West Africa
