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Rabelo MM, Dimase M, Paula-Moraes SV. Ecology and management of the invasive land snail Bulimulus bonariensis (Rafinesque, 1833) (Stylommatophora: Bulimulidae) in row crops. Front Insect Sci 2022; 2:1056545. [PMID: 38468786 PMCID: PMC10926363 DOI: 10.3389/finsc.2022.1056545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 11/30/2022] [Indexed: 03/13/2024]
Abstract
Solutions for managing the growing populations of the snail Bulimulus bonariensis (Rafinesque, 1833) in row crops, notably peanut (Arachis hypogaea L.), are urgently needed in the United States. This species has become a concern to the economy and food security for infesting commercial crops in U.S. southern states. In the present study, sampling, trapping, and management strategies were investigated to support a management program for B. bonariensis in row crops. In addition, the preference of B. bonariensis for species of row crops and weeds, used as a shelter, and snail dispersal capacity were documented. The results indicated that the ideal tools for monitoring and capturing snails are beat cloth and cardboard trap, respectively. Metaldehyde 4% bait produced effective control. Tillage was tested as an alternative cultural management tactic and produced the most promising outcomes in lowering snail populations. According to snail ecological studies, peanut and soybean are the preferred crops used as shelter over cotton and corn. Among eight common winter-growing weeds, the favored non-crop host plants are cutleaf primrose (Oenothera laciniata) and dandelion (Taraxacum officinale). The snail field population tends to increase as early spring temperatures rise, with more snails becoming trapped in warm, humid conditions but not through heavy precipitation. This study provides ecology information on B. bonariensis and validates tactics to manage this invasive species in row crops, in an IPM approach.
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Affiliation(s)
| | | | - Silvana V. Paula-Moraes
- Department of Entomology and Nematology, West Florida Research and Education Center, University of Florida, Jay, FL, United States
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Dimase M, Brown S, Head GP, Price PA, Walker W, Yu W, Huang F. Performance of Bt-susceptible and -heterozygous dual-gene resistant genotypes of Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) in seed blends of non-Bt and pyramided Bt maize. Insect Sci 2021; 28:1147-1158. [PMID: 32662592 DOI: 10.1111/1744-7917.12850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 07/06/2020] [Accepted: 07/07/2020] [Indexed: 05/28/2023]
Abstract
A seed blend refuge has been implemented in the U.S. Corn Belt for Bt maize resistance management. The fall armyworm, Spodoptera frugiperda (J.E. Smith), is a target pest of Bt maize in the Americas. The larvae of this pest are mobile, which may affect the efficacy of seed blend refuges. In this study, field and greenhouse trials were conducted to determine the performance of Bt-susceptible (aabb) and -heterozygous dual-gene-resistant (AaBb) genotypes of S. frugiperda in seed blends of non-Bt and pyramided Bt maize. Three field trials evaluated larval survival, larval growth, and plant injury with aabb in seed blends of Bt maize expressing Cry1A.105/Cry2Ab2/Vip3A with 0-30% non-Bt seeds. Greenhouse tests investigated the performance of aabb and AaBb in seed blends of Cry1A.105/Cry2Ab2 with 0-30% non-Bt seeds. In pure non-Bt maize plots, after 9-13 d of neonates being released on the plants, 0.39 and 0.65 larvae/plant survived with leaf injury ratings of 4.7 and 5.9 (Davis's 1-9 scale) in the field and greenhouse, respectively. In contrast, live larvae and plant injury were virtually not observed on Bt plants across all planting patterns. Larval occurrence and plant injury by aabb on non-Bt plants were similar between seed blends and pure non-Bt plantings, suggesting that the blended refuges could provide an equivalent susceptible population as structured refuge under the test conditions. In the greenhouse, the two insect genotypes in seed blends performed similarly, indicating that the seed blends did not provide more favorable conditions for AaBb over aabb. The information generated from this study should be useful in managing S. frugiperda and evaluating if send blends could be suitable refuge options for Bt resistance management in the regions where the insect is a primary target pest.
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Affiliation(s)
- Marcelo Dimase
- Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, Louisiana, USA
| | - Sebe Brown
- Dean Lee Research Station, Louisiana State University Agricultural Center, Alexandria, Louisiana, USA
| | | | | | - Wade Walker
- Macon Ridge Research Station, Louisiana State University Agricultural Center, Winnsboro, Louisiana, USA
| | - Wenbo Yu
- Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, Louisiana, USA
| | - Fangneng Huang
- Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, Louisiana, USA
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Niu Y, Oyediran I, Yu W, Lin S, Dimase M, Brown S, Reay-Jones FPF, Cook D, Reisig D, Thrash B, Ni X, Paula-Moraes SV, Zhang Y, Chen JS, Wen Z, Huang F. Populations of Helicoverpa zea (Boddie) in the Southeastern United States are Commonly Resistant to Cry1Ab, but Still Susceptible to Vip3Aa20 Expressed in MIR 162 Corn. Toxins (Basel) 2021; 13:63. [PMID: 33467562 PMCID: PMC7830782 DOI: 10.3390/toxins13010063] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 01/06/2021] [Accepted: 01/12/2021] [Indexed: 01/12/2023] Open
Abstract
The corn earworm, Helicoverpa zea (Boddie), is a major pest targeted by pyramided Bacillus thuringiensis (Bt) corn and cotton in the U.S. Cry1Ab is one of the first insecticidal toxins used in Bt crops, while Vip3A is a relatively new toxin that has recently been incorporated into Cry corn with event MIR 162 and Cry cotton varieties to generate pyramided Bt traits targeting lepidopteran pests including H. zea. The objectives of this study were to determine the current status and distribution of the Cry1Ab resistance, and evaluate the susceptibility to Vip3Aa20 expressed in MIR 162 corn in H. zea in the southeastern U.S. During 2018 and 2019, 32 H. zea populations were collected from non-Bt corn (19 populations), Cry corn (12), and Cry/Vip3A cotton (1) across major corn areas in seven southeastern states of the U.S. Susceptibility of these populations to Cry1Ab and Vip3Aa20 was determined using diet-overlay bioassays. Compared to a known susceptible insect strain, 80% of the field populations were 13- to >150-fold resistant to Cry1Ab, while their response to Vip3Aa20 ranged from >11-fold more susceptible to 9-fold more tolerant. Mean susceptibility to each Bt toxin was not significantly different between the two groups of the populations collected from non-Bt and Bt crops, as well as between the two groups of the populations collected during 2018 and 2019. The results show that resistance to Cry1Ab in H. zea is widely distributed across the region. However, the Cry1Ab-resistant populations are not cross-resistant to Vip3Aa20, and H. zea in the region is still susceptible to the Vip3Aa20 toxin. Vip3Aa20 concentrations between 5 and 10 µg/cm2 may be used as diagnostic concentrations for susceptibility monitoring in future. Additional studies are necessary to elucidate the impact of the selection with Bt corn on resistance evolution in H. zea to Vip3A cotton in the U.S.
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Affiliation(s)
- Ying Niu
- Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA; (Y.N.); (W.Y.); (S.L.); (M.D.)
| | - Isaac Oyediran
- Syngenta Crop Protection LLC, Research Triangle Park, NC 27709, USA; (I.O.); (Y.Z.); (J.S.C.); (Z.W.)
| | - Wenbo Yu
- Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA; (Y.N.); (W.Y.); (S.L.); (M.D.)
| | - Shucong Lin
- Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA; (Y.N.); (W.Y.); (S.L.); (M.D.)
| | - Marcelo Dimase
- Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA; (Y.N.); (W.Y.); (S.L.); (M.D.)
| | - Sebe Brown
- Dean Lee Research Station, Louisiana State University Agricultural Center, Alexandria, LA 71302, USA;
| | | | - Don Cook
- Delta Research and Extension Center, Mississippi State University, Stoneville, MS 38776, USA;
| | - Dominic Reisig
- Vernon G. James Research and Extension Center, North Carolina State University, Plymouth, NC 27962, USA;
| | - Ben Thrash
- Lonoke Extension Center, University of Arkansas, Lonoke, AR 72086, USA;
| | - Xinzhi Ni
- Crop Genetics and Breeding Research, USDA-ARS, Tifton, GA 3173, USA;
| | - Silvana V. Paula-Moraes
- Entomology & Nematology Department, West Florida Research and Education Center, University of Florida, Jay, FL 32565, USA;
| | - Yan Zhang
- Syngenta Crop Protection LLC, Research Triangle Park, NC 27709, USA; (I.O.); (Y.Z.); (J.S.C.); (Z.W.)
| | - Jeng Shong Chen
- Syngenta Crop Protection LLC, Research Triangle Park, NC 27709, USA; (I.O.); (Y.Z.); (J.S.C.); (Z.W.)
| | - Zhimou Wen
- Syngenta Crop Protection LLC, Research Triangle Park, NC 27709, USA; (I.O.); (Y.Z.); (J.S.C.); (Z.W.)
| | - Fangneng Huang
- Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA; (Y.N.); (W.Y.); (S.L.); (M.D.)
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Kaur G, Guo J, Brown S, Head GP, Price PA, Paula-Moraes S, Ni X, Dimase M, Huang F. Field-evolved resistance of Helicoverpa zea (Boddie) to transgenic maize expressing pyramided Cry1A.105/Cry2Ab2 proteins in northeast Louisiana, the United States. J Invertebr Pathol 2019; 163:11-20. [DOI: 10.1016/j.jip.2019.02.007] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Revised: 12/13/2018] [Accepted: 02/22/2019] [Indexed: 11/28/2022]
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