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Abid AD, Saeed S, Zaka SM, Ali M, Shahzad MS, Khan KA, Iqbal N. Manifold passages in an assorted infection in a host could improve virulence of Helicoverpa armigera Nucleopolyhedrovirus (HaNPV). Saudi J Biol Sci 2020; 27:1419-1422. [PMID: 32489276 PMCID: PMC7253915 DOI: 10.1016/j.sjbs.2020.02.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 02/15/2020] [Accepted: 02/29/2020] [Indexed: 12/04/2022] Open
Abstract
Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) is serious pests of cotton and several other crops. Helicoverpa armigera Nucleopolyhedrovirus (HaNPV) can be important alternative to synthetic insecticides for the management of H. armigera. However, the efficacy of HaNPV can vary in horizontal and vertical transmission. In the current study, we evaluated the efficacy of HaNPV of a virulent strain (vertically transmitted up to six generations) and wild strains (used after isolation from the field infected larvae). Both strains were applied to the 2nd instar larvae of H. armigera @ 1 × 109 polyhedral inclusion bodies (PIB)/ml. There were six replications of each strain (strains). The results indicated higher mortalities in larvae exposed to virulent strains (68.33 ± 6.07%) as compared to wild strain (45 ± 2.24%). Virulent strains killed the larvae quite faster than wild strain. The lethal time (LT50) to kill 50% of the larvae by virulent strain was 7.15 days and for wild strain it was 19.47 days. The results showed that multiple passage of HaNPV through several generations enhances its efficacy to kill H. armigera larvae faster. The results of this study will be helpful to manage H. armigera and other related lepidopoterous pests.
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Affiliation(s)
- Allah Ditta Abid
- Department of Entomology, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan 60800, Pakistan.,Department of Plant Protection, Karachi Ministry of National Food Security, Pakistan
| | - Shafqat Saeed
- Department of Entomology, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan 60800, Pakistan.,Institute of Plant Protection, MNS-University of Agriculture, Multan (60000), Pakistan
| | - Syed Muhammad Zaka
- Department of Entomology, Bahauddin Zakariya University, Multan (60800), Pakistan
| | - Muhammad Ali
- Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan (60800), Pakistan.,Qauid-i-Azam University, Islamabad, Pakistan
| | | | - Khalid Ali Khan
- Unit of Bee Research and Honey Production, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia.,Biology Department, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia.,Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Naeem Iqbal
- Institute of Plant Protection, MNS-University of Agriculture, Multan (60000), Pakistan
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Black JL, Lorenz GM, Cato AJ, Faske TR, Popham HJR, Paddock KJ, Bateman NR, Seiter NJ. Field Studies on the Horizontal Transmission Potential by Voluntary and Involuntary Carriers of Helicoverpa armigera nucleopolyhedrovirus (Baculoviridae). JOURNAL OF ECONOMIC ENTOMOLOGY 2019; 112:1098-1104. [PMID: 30715431 DOI: 10.1093/jee/toz012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Indexed: 06/09/2023]
Abstract
Horizontal transmission of Helicoverpa armigera nucleopolyhedrovirus (HearNPV) has been found to occur through several pathways involving abiotic factors such as soil, wind, and rain, and biotic factors such as predators, parasitoids, and infected hosts. Previous studies examining horizontal transmission through certain biological carriers speculated they were likely not significant in increasing infection rates, however; these studies only focused on a relatively small number of arthropods present within a field setting. This study was conducted to evaluate the horizontal transmission potential of HearNPV by all potential biological carriers when applied as a foliar bioinsecticide or as virus-infected, nonmotile Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) larvae in a soybean field. Soybean plots were either sprayed with HearNPV or infested with late-stage HearNPV-infected larvae, and sample zones were sampled 3, 7, 10, 14, 17, and 21 days after the infestation, and analyzed for viral presence using PCR. We then identified HearNPV carriers through contamination from the application (involuntary) or through contact with a HearNPV-infected larva (voluntary). Both were confirmed through PCR analysis. Regardless of application technique, on average, HearNPV was capable of disseminating up to 61.0 m in 3 d after inoculation and was found within the sampled canopy 13-21 d after inoculation. Several arthropods were identified as novel carriers of HearNPV. Results from this study indicate that many novel HearNPV carriers are likely important in disseminating HearNPV.
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Affiliation(s)
- Joseph L Black
- Department of Entomology, The University of Arkansas, Lonoke Agricultural Center, Lonoke, AR
- Department of Entomology, Texas A&M University, College Station, TX
| | - Gus M Lorenz
- Department of Entomology, The University of Arkansas, Lonoke Agricultural Center, Lonoke, AR
| | - Aaron J Cato
- Department of Entomology, The University of Arkansas, Fayetteville, AR
| | - Travis R Faske
- Department of Plant Pathology, The University of Arkansas, Lonoke Extension Center, Lonoke, AR
| | | | - Kyle J Paddock
- AgBiTech LLC, Fort Worth, TX
- Division of Plant Sciences, University of Missouri, Columbia, MO
| | - Nick R Bateman
- Department of Entomology, The University of Arkansas, Rice Research and Extension Center, Stuttgart, AR
| | - Nicholas J Seiter
- Department of Entomology, The University of Arkansas, Southeast Research and Extension Center, Rohwer, AR
- Department of Crop Sciences, University of Illinois, Urbana, IL
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RAYMOND BEN, SAYYED ALIH, HAILS ROSIES, WRIGHT DENISJ. Exploiting pathogens and their impact on fitness costs to manage the evolution of resistance to Bacillus thuringiensis. J Appl Ecol 2007. [DOI: 10.1111/j.1365-2664.2007.01285.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Secondary transmission of nuclear polyhedrosis virus by Pseudoplusia includens and Anticarsia gemmatalis larvae on semisynthetic diet. J Invertebr Pathol 1988. [DOI: 10.1016/0022-2011(88)90070-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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