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Pan X, Cao F, Guo X, Wang Y, Cui Z, Huang T, Hou Y, Guan X. Development of a Safe and Effective Bacillus thuringiensis-Based Nanobiopesticide for Controlling Tea Pests. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:7807-7817. [PMID: 38514390 DOI: 10.1021/acs.jafc.4c00833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Mg(OH)2 was used as the nanocarrier of the Bacillus thuringiensis (Bt) Cry1Ac protein, and the synthesized Cry1Ac-Mg(OH)2 composites were regular and uniform nanosheets. Nano-Mg(OH)2 could effectively improve the insecticidal effect of the Cry1Ac protein toward Ectropis obliqua. It could enhance the damage degree of the Cry1Ac protein to intestinal epithelial cells and microvilli, induce and enrich the production of reactive oxygen species (ROS) in the midgut, and enhance the degradation of the Cry1Ac protein into active fragments. Furthermore, an anti-rinsing assay showed that the Cry1Ac-Mg(OH)2 composites were bound to the notch structure of the tea leaf surface. The retention of the Cry1Ac protein increased by 11.45%, and sprayed nano-Mg(OH)2 was rapidly absorbed by different tissues of tea plants. Moreover, nano-Mg(OH)2 and composites did not significantly affect non-target organisms. These results show that nano-Mg(OH)2 can serve as a safe and effective biopesticide carrier, which provides a new approach for stable and efficient Bt preparation.
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Affiliation(s)
- Xiaohong Pan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Fang Cao
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Xueping Guo
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Yilin Wang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Ziqi Cui
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Tianpei Huang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Youming Hou
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
| | - Xiong Guan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection & Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education & Fujian-Taiwan Joint Center for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, People's Republic of China
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Zhao J, Chen Y, Keyhani NO, Wang C, Li Y, Pu H, Li J, Liu S, Lai P, Zhu M, He X, Cai S, Guan X, Qiu J. Isolation of a highly virulent Metarhizium strain targeting the tea pest, Ectropis obliqua. Front Microbiol 2023; 14:1164511. [PMID: 37256050 PMCID: PMC10226365 DOI: 10.3389/fmicb.2023.1164511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 04/18/2023] [Indexed: 06/01/2023] Open
Abstract
Introduction Tea is one of the most widely consumed beverages around the world. Larvae of the moth, Ectropis obliqua Prout (Geometridae, Lepidoptera), are one of the most destructive insect pests of tea in China. E. obliqua is a polyphagus insect that is of increasing concern due to the development of populations resistant to certain chemical insecticides. Microbial biological control agents offer an environmentally friendly and effective means for insect control that can be compatible with "green" and organic farming practices. Methods To identify novel E. obliqua biological control agents, soil and inset cadaver samples were collected from tea growing regions in the Fujian province, China. Isolates were analyzed morphologically and via molecular characterization to identity them at the species level. Laboratory and greenhouse insect bioassays were used to determine the effectiveness of the isolates for E. obliqua control. Results Eleven isolates corresponding to ten different species of Metarhizium were identified according to morphological and molecular analyses from soil and/or insect cadavers found on tea plants and/or in the surrounding soil sampled from eight different regions within the Fujian province, China. Four species of Metarhizium including M. clavatum, M. indigoticum, M. pemphigi, and M. phasmatodeae were documented for the first time in China, and the other species were identified as M. anisopliae, M. brunneum, M. lepidiotae, M. majus, M. pinghaense, and M. robertsii. Insect bioassays of the eleven isolates of Metarhizium revealed significant variation in the efficacy of each isolate to infect and kill E. obliqua. Metarhizium pingshaense (MaFZ-13) showed the highest virulence reaching a host target mortality rate of 93% in laboratory bioassays. The median lethal concentration (LC50) and median lethal time (LT50) values of M. pingshaense MaFZ-13 were 9.6 × 104 conidia/mL and 4.8 days, respectively. Greenhouse experiments and a time-dose-mortality (TDM) models were used to further evaluate and confirm the fungal pathogenic potential of M. pingshaense MaFZ-13 against E. obliqua larvae. Discussion Isolation of indigenous microbial biological control agents targeting specific pests is an effective approach for collecting resources that can be exploited for pest control with lowered obstacles to approval and commercialization. Our data show the presence of four different previously unreported Metarhizium species in China. Bioassays of the eleven different Metarhizium strains isolated revealed that each could infect and kill E. obliqua to different degrees with the newly isolated M. pingshaense MaFZ-13 strain representing a particularly highly virulent isolate potentially applicable for the control of E. obliqua larvae.
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Affiliation(s)
- Jie Zhao
- Key Lab of Biopesticide and Chemical Biology, Ministry of Education; State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Yuxi Chen
- Key Lab of Biopesticide and Chemical Biology, Ministry of Education; State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Nemat O. Keyhani
- Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, United States
| | - Cong Wang
- Key Lab of Biopesticide and Chemical Biology, Ministry of Education; State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Yichen Li
- Dulwich International High School Suzhou, Suzhou, Jiangsu, China
| | - Huili Pu
- Key Lab of Biopesticide and Chemical Biology, Ministry of Education; State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Jincheng Li
- Key Lab of Biopesticide and Chemical Biology, Ministry of Education; State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Sen Liu
- Key Lab of Biopesticide and Chemical Biology, Ministry of Education; State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Pengyu Lai
- Key Lab of Biopesticide and Chemical Biology, Ministry of Education; State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Mengjia Zhu
- Key Lab of Biopesticide and Chemical Biology, Ministry of Education; State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Xueyou He
- Fujian Academy of Forestry, Fuzhou, Fujian, China
| | - Shouping Cai
- Fujian Academy of Forestry, Fuzhou, Fujian, China
| | - Xiayu Guan
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Junzhi Qiu
- Key Lab of Biopesticide and Chemical Biology, Ministry of Education; State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
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Shahriari M, Zibaee A, Mirhaghparast SK, Pour SA, Ramzi S, Hoda H. Mortality and physiological impacts of the tea saponin against Ephestia kuehniella Zeller (Lepidoptera: Pyralidae). TOXIN REV 2021. [DOI: 10.1080/15569543.2021.1974042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Morteza Shahriari
- Department of Plant Protection, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran
| | - Arash Zibaee
- Department of Plant Protection, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran
| | | | - Sarah Aghaeepour Pour
- Department of Plant Protection, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran
| | - Samar Ramzi
- Plant protection Department, Research Center for Agriculture and Natural Resources, Agricultural Research, Education and Extension Organization (AREEO), Rasht, Iran
| | - Hassan Hoda
- Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension, Amol, Iran
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Yin H, Fu Z, Yang X, Zhou Y, Mao X, Liu Z, Fu J. Functional annotation of Ectropis obliqua transcriptome in the treatment of pyrethroid insecticides. Meta Gene 2021. [DOI: 10.1016/j.mgene.2021.100860] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Ecologically controlling insect and mite pests of tea plants with microbial pesticides: a review. Arch Microbiol 2020; 202:1275-1284. [PMID: 32185410 DOI: 10.1007/s00203-020-01862-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 03/01/2020] [Accepted: 03/05/2020] [Indexed: 02/01/2023]
Abstract
Insect and mite pests are damaging stressors that are threatening the cultivation of tea plants, which result in enormous crop loss. Over the years, the effectiveness of synthetic pesticides has allowed for its prominent application as a control strategy. However, the adverse effects of synthetic pesticides in terms of pesticide residue, environmental contamination and insect pest resistance have necessitated the need for alternative strategies. Meanwhile, microbial pesticides have been applied to tackle the damaging activities of the insect and mite pests of tea plants, and their performances were scientifically adjudged appreciable and environmental friendly. Herein, entomopathogenic microbes that were effective against tea geometrid (Ectropis obliqua Prout), tea green leafhopper (Empoasca onukii Matsuda), paraguay tea ampul (Gyropsylla spegazziniana), tea mosquito bug (Helopeltis theivora Waterhouse) and red spider mite (Oligonychus coffea Nietner) have been reviewed. The current findings revealed that microbial pesticides were effective and showed promising performances against these pests. Overall, this review has provided the basic and integrative information on the integrated pest management (IPM) tool(s) that can be utilized towards successful control of the aforementioned insect and mite pests.
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Cui C, Yang Y, Zhao T, Zou K, Peng C, Cai H, Wan X, Hou R. Insecticidal Activity and Insecticidal Mechanism of Total Saponins from Camellia oleifera. Molecules 2019; 24:molecules24244518. [PMID: 31835551 PMCID: PMC6943515 DOI: 10.3390/molecules24244518] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 12/06/2019] [Accepted: 12/08/2019] [Indexed: 11/16/2022] Open
Abstract
Chemical pesticides are commonly used during the cultivation of agricultural products to control pests and diseases. Excessive use of traditional pesticides can cause environmental and human health risks. There are ongoing searches for new plant-derived pesticides to reduce the use of chemical pesticides. In this study, tea saponin extracts of different purities were extracted from Camellia oleifera seeds using AB-8 macroporous resin and gradient elution with ethanol. The insecticidal effects of the tea saponin extracts were evaluated by contact toxicity tests and stomach toxicity tests using the lepidopteran pest of tea plantation, Ectropis obliqua. The total saponins extracted using 70% ethanol showed strong contact toxicity (LC50 = 8.459 mg/L) and stomach toxicity (LC50 = 22.395 mg/L). In-depth mechanistic studies demonstrated that tea saponins can disrupt the waxy layer of the epidermis, causing serious loss of water, and can penetrate the inside of the intestine of E. obliqua. After consumption of the tea saponins, the intestinal villi were shortened and the cavities of the intestinal wall were disrupted, which resulted in larval death. This study highlights the potential of tea saponins as a natural, plant-derived pesticide for the management of plant pests.
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Affiliation(s)
| | | | | | | | | | | | | | - Ruyan Hou
- Correspondence: ; Tel.: +86-551-65786765
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Fu J, Liu G, Yang M, Wang X, Chen X, Chen F, Yang Y. Isolation and functional analysis of squalene synthase gene in tea plant Camellia sinensis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 142:53-58. [PMID: 31272035 DOI: 10.1016/j.plaphy.2019.06.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/21/2019] [Accepted: 06/21/2019] [Indexed: 05/27/2023]
Abstract
Tea contains high quantities and diverse types of triterpenoids, particularly in the form of saponins. However, little is yet known about the molecular basis of triterpenoid biosynthesis in tea plant. Here we report on isolation and functional analysis of squalene synthase (SQS) gene from tea plant (Camellia sinensis var. sinensis), which controls the biosynthesis of triterpenoids precursor. First, a full-length cDNA of squalene synthase, designated CsSQS, was isolated from tea plant. The protein is highly homologous to SQSs from other plants. Using CsSQS-reporter assays, CsSQS was demonstrated to be endoplasmic reticulum membrane-bound. The coding region of CsSQS excluding transmemberane sequence was expressed in Escherichia coli. Recombinant CsSQS catalyzed the formation of squalene using farnesyl-pyrophosphate (FPP) as substrate with NADPH and Mg2+. In tea plant leaves, CsSQS expression was significantly induced by both herbivore and mechanical damages. Consistent with the stronger induction of CsSQS expression by mechanical damage than herbivory, tea plants injured mechanically released squalene as a volatile compound, which however was not detected from herbivore-damaged tea plants. Furthermore, it was found that the flowers of another tea plant cultivar Camellia sinensis var. assamica contain higher concentrations of squalene than the cultivar sinensis, indicating variations among tea plant varieties. With the identification and molecular characterization of squalene synthase in tea plant, next, we can ask the questions about the roles of squalene as a volatile product as well as a precursor for triterpenoids, which may promote product development from diverse tea materials and mining of excellent tea germplasm resources.
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Affiliation(s)
- Jianyu Fu
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China; Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, China; Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
| | - Guanhua Liu
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China; Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, China; Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Mei Yang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China; Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, China; Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Xinchao Wang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China; National Center for Tea Plant Improvement, Hangzhou, 310008, China
| | - Xinlu Chen
- Department of Plant Sciences, University of Tennessee, Knoxville, TN, 37996, USA
| | - Feng Chen
- Department of Plant Sciences, University of Tennessee, Knoxville, TN, 37996, USA
| | - Yajun Yang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China; National Center for Tea Plant Improvement, Hangzhou, 310008, China.
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Tahir HM, Basheer T, Ali S, Yaqoob R, Naseem S, Khan SY. Effect of Pesticides on Biological Control Potential of Neoscona theisi (Araneae: Araneidae). JOURNAL OF INSECT SCIENCE (ONLINE) 2019; 19:17. [PMID: 30915446 PMCID: PMC6435917 DOI: 10.1093/jisesa/iez024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Indexed: 04/30/2023]
Abstract
The present study was designed to record the effect of λ-cyhalothrin, Bifenthrin, and Glyphosate on the mortality, avoidance behavior, foraging activity, and activity of Acetylcholine esterase (AChE) and Carboxylesterase (CarE) in Neoscona theisi (Walckenaer, 1841). Highest mortality (70%) in N. theisi was recorded against λ-cyhalothrin. However, Glyphosate was found to be least toxic. Spider spent less time on insecticides/herbicide-treated surfaces. Insecticides/herbicide-treated N. theisi consumed less prey than untreated control spiders. Similarly, when N. theisi were offered insecticide/herbicide-treated prey, they consumed significantly less. Increased AChE and CarE activities were recorded in insecticides/herbicide-treated spiders as compared to control group. Total protein contents were less in insecticides/herbicide-treated spiders than control group. The results revealed that λ-cyhalothrin is more harmful to spiders as compared to Bifenthrin and Glyphosate. It is suggested that the effect of all pesticides used in agro-ecosystem on beneficial insects should be evaluated before using them in the fields.
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Affiliation(s)
| | - Tayyba Basheer
- Department of Zoology, GC University Lahore, Lahore, Pakistan
| | - Shaukat Ali
- Department of Zoology, GC University Lahore, Lahore, Pakistan
| | - Rabia Yaqoob
- Department of Zoology, University of Education, DG Khan Campus, Dera Ghazi Khan, Pakistan
| | - Sajida Naseem
- Department of Zoology, University of Education, Lower Mall Campus, Lahore, Pakistan
| | - Shafaat Yar Khan
- Department of Zoology, University of Sargodha, Sargodha, Pakistan
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