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Pheromones and Chemical Communication in Insects 昆虫的信息素与化学通讯
Pub Date : 2020-12-23 DOI: 10.5772/intechopen.92384
Nesreen M. Abd El-Ghany
Chemical communication is an essential item for insects’ survivals that qualify them to adapt their behavior depending on the surrounding environment. Semiochemicals defined as informative molecules (M) mainly play an important role that conveys specific chemical messages between insect and insect and plant and insect. Olfaction mechanism in insects is a key point of chemical communication between the same and different insect species. Discrimination of various odors through the olfaction system depends only on the evolutionary pressures of the molecules which stimulate the development of specific binding proteins (BPs) and specific receptor sites present on individual chemosensory neurons. Pheromones are defined as species-specific chemical signals which enable communication between life-forms of the same species. Recently, semiochemicals become as alternative or complementary components to insecticide approaches in integrated pest management (IPM) strategies. Pheromones are secreted by insects causing a specific reaction, for example, either a definite behavior or a developmental process. Pheromones have been classified into eight various types: aggregation pheromones, alarm pheromones, oviposition-deterrent pheromones, home recognition pheromones, sex pheromones, trail pheromones, recruitment pheromones, and royal pheromones. Pheromones are promising and can be used singly or in integration with other control strategies for monitoring and controlling insect pests in agricultural systems.
化学通讯是昆虫生存的基本要素,使它们有资格根据周围环境调整自己的行为。符号化学物质是一种信息分子(M),主要在昆虫与昆虫、植物与昆虫之间传递特定的化学信息。昆虫的嗅觉机制是昆虫同种和异种之间进行化学交流的关键。通过嗅觉系统对各种气味的辨别仅依赖于刺激特定结合蛋白(bp)和存在于单个化学感觉神经元上的特定受体位点发育的分子的进化压力。信息素被定义为物种特有的化学信号,使同一物种的生命形式之间能够进行交流。近年来,在病虫害综合治理(IPM)战略中,符号化学品已成为杀虫剂方法的替代或补充成分。信息素是由昆虫分泌的,引起特定的反应,例如,一种确定的行为或一个发育过程。信息素被分为八种不同的类型:聚集信息素、警报信息素、产卵-威慑信息素、家庭识别信息素、性信息素、踪迹信息素、招募信息素和皇家信息素。信息素很有前途,可以单独使用,也可以与其他控制策略结合使用,用于监测和控制农业系统中的害虫。
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引用次数: 9
Herbicide Resistance in Brazil: Status, Impacts, and Future Challenges 巴西除草剂抗性:现状、影响和未来挑战
Pub Date : 2020-12-23 DOI: 10.5772/intechopen.91236
R. Alcántara-de la Cruz, Guilherme Moraes de Oliveira, Leonardo Bianco de Carvalho, Maria Fátima das Graças Fernandes da Silva
Brazil is a large producer and exporter of crops in global terms. Weeds may be responsible for ~14% of crop losses, depending on the crop system. Herbicides occupy 58% of the Brazilian pesticide market; however, the continuous use of these products and the high selection pressure have led to the emergence of weeds resistant to herbicides. Today, there are 51 weed species reported as being resistant to herbicides in Brazil, of which 17 involves cross and multiple-resistance. Acetolactate synthase (ALS), acetyl coenzyme A carboxylase (ACCase) and 5-enolpiruvylshikimate-3-phosphate synthase (EPSPs) inhibitors are the herbicidal groups with the most resistance cases. Soybean, corn, rice, wheat and cotton present 30, 12, 10, 9 and 8 cases, respectively, occurring mainly in herbicide-resistant crop fields from the Southern and Central West regions of the country. To better understand the dimensions of herbicide resistance, in this chapter, we will explore the size of agricultural activity in Brazil, the pesticide market and the use of herbicides in the main crops. In addition, the agronomic, scientific-technical and economic aspects that have contributed, directly or indirectly, to the selection of resistant weeds will be discussed in order to have an overview of the economic impact of herbicide resistance management.
巴西是全球最大的粮食生产国和出口国。根据不同的作物系统,杂草可能造成约14%的作物损失。除草剂占据巴西农药市场58%的份额;然而,这些产品的持续使用和高选择压力导致杂草出现抗除草剂。今天,据报道,巴西有51种杂草对除草剂具有抗性,其中17种涉及交叉抗性和多重抗性。其中,乙酰乳酸合成酶(ALS)抑制剂、乙酰辅酶A羧化酶(ACCase)抑制剂和5-烯醇吡啶莽草酸-3-磷酸合成酶(EPSPs)抑制剂耐药最多。大豆、玉米、水稻、小麦和棉花分别出现30例、12例、10例、9例和8例,主要发生在该国南部和中西部地区的抗除草剂作物田里。为了更好地了解除草剂抗性的各个方面,在本章中,我们将探讨巴西农业活动的规模、农药市场和主要作物除草剂的使用情况。此外,还将讨论直接或间接促成抗除草剂杂草选择的农艺、科学技术和经济方面,以便对抗除草剂管理的经济影响有一个概述。
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引用次数: 19
Variable Rate Application of Herbicides for Weed Management in Pre- and Postemergence 出苗期前后杂草管理中除草剂的可变用量应用
Pub Date : 2020-12-23 DOI: 10.5772/intechopen.93558
Alessandro da Costa Lima, Kassio Ferreira Mendes
With the advent of precision agriculture, it was possible to integrate several technologies to develop the variable rate application (VRA). The use of VRA allows savings in the use of herbicides, better weed control, lower environmental impact and, indirectly, increased crop productivity. There are VRA techniques based on maps and sensors for herbicide application in preemergence (PRE) and postemergence (POST). The adoption of the type of system will depend on the investment capacity of the producer, skilled workforce available, and the modality of application. Although it still has some limitations, VRA has been widespread and has been occupying more and more space in chemical management, the tendency in the medium- and long term is that there is a gradual replacement of the conventional method of application. Given the benefits provided by VRA along with the engagement of companies and researchers, there will be constant evolution and improvement of this technology, cheapening the costs of implementation and providing its adoption by an increasing number of producers. Thus, the objective of this chapter was to address an overview of the use of herbicides in VRA for weed management in PRE and POST.
随着精准农业的出现,整合多种技术开发可变速率应用(VRA)成为可能。使用VRA可以节省除草剂的使用,更好地控制杂草,减少对环境的影响,并间接提高作物生产力。基于地图和传感器的VRA技术主要用于苗期前(PRE)和苗期后(POST)的除草剂施用。系统类型的采用将取决于生产者的投资能力、现有的熟练劳动力和应用方式。虽然还存在一定的局限性,但VRA已得到广泛应用,在化学品管理中占据越来越大的空间,中长期趋势是逐步取代传统的应用方法。考虑到VRA带来的好处以及公司和研究人员的参与,这项技术将不断发展和改进,降低实施成本,并为越来越多的生产商提供采用。因此,本章的目的是概述在前和后的杂草管理中除草剂在VRA中的使用。
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引用次数: 2
Glyphosate Residues in Soil and Air: An Integrated Review 土壤和空气中草甘膦残留:综合综述
Pub Date : 2020-07-07 DOI: 10.5772/intechopen.93066
Evagelia Tzanetou, H. Karasali
Glyphosate [N-(phosphonomethyl) glycine] (GPS) is currently the most commonly applied herbicide worldwide. Given the widespread use of glyphosate, the investigation of the relationship between glyphosate and soil ecosystem is critical and has great significance for its valid application and environmental safety evaluation. However, although the occurrence of glyphosate residues in surface and groundwater is rather well documented, only few information are available for soils and even fewer for air. Due to this, the importance of developing methods that are effective and fast to determine and quantify glyphosate and its major degradation product, aminomethylphosphonic acid (AMPA), is emphasized. Based on its structure, the determination of this pesticide using a simple analytical method remains a challenge, a fact known as the “glyphosate paradox.” In this chapter a critical review of the existing literature and data comparison studies regarding the occurrence and the development of analytical methods for the determination of pesticide glyphosate in soil and air is performed.
草甘膦[N-(磷甲乙基)甘氨酸](GPS)是目前世界范围内应用最广泛的除草剂。鉴于草甘膦的广泛使用,研究草甘膦与土壤生态系统的关系至关重要,对草甘膦的有效应用和环境安全评价具有重要意义。然而,尽管草甘膦残留在地表水和地下水中的情况有相当充分的记录,但关于土壤的资料很少,关于空气的资料就更少了。因此,开发一种有效、快速的方法来测定和定量草甘膦及其主要降解产物氨基甲基膦酸(AMPA)的重要性被强调。基于其结构,使用简单的分析方法确定这种农药仍然是一个挑战,这一事实被称为“草甘膦悖论”。在本章中,对有关土壤和空气中农药草甘膦的发生和分析方法的发展的现有文献和数据比较研究进行了批判性回顾。
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引用次数: 12
Identification of Ticks in Dogs with Ehrlichiosis 埃利希体病犬蜱的鉴定
Pub Date : 2020-07-02 DOI: 10.5772/intechopen.92244
K. Karthika
Examination of ticks collected from ehrlichiosis positive dogs revealed the occurrence of Rhipicephalus sanguineus. The distribution of ehrlichiosis in dogs is related to the spreading of vectors. Ehrlichia canis is the etiologic agent of canine monocytic ehrlichiosis (CME) and recognized as the most prevalent tick-borne disease affecting dogs and is transmitted by the brown dog tick Rhipicephalus sanguineus with an expanding global distribution. Infection of the vertebrate host occurred when an infected tick ingested a blood meal which in turn contaminated the feeding site with its salivary secretion. Blood transfusions from infected donors can also transmit the organisms. Hence, identification of ticks is necessary to detect the disease affecting dogs.
从埃利希体病阳性犬身上采集的蜱虫检查显示出现了血根头虫。埃利希体病在犬中的分布与病媒传播有关。犬埃利希体是犬单核细胞埃利希体病(CME)的病原,被认为是影响狗的最普遍的蜱传疾病,由棕色狗蜱传播,并在全球范围内不断扩大。脊椎动物宿主的感染发生在受感染的蜱虫摄入血食后,其唾液分泌污染了进食部位。受感染献血者的输血也会传播这种微生物。因此,鉴定蜱虫对检测影响狗的疾病是必要的。
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引用次数: 0
A Review of the Analytical Methods Based on Chromatography for Analyzing Glyphosate in Foods 食品中草甘膦色谱分析方法综述
Pub Date : 2020-06-17 DOI: 10.5772/intechopen.92810
P. Avino, Ivan Notardonato, M. V. Russo
Glyphosate is a pesticide widely used in agriculture, horticulture, and silviculture as well as around homes and gardens. It was introduced by Monsanto in the early 1970s, and it is a broad spectrum, nonselective, post-emergence herbicide that inhibits plants’ shikimic acid pathway. Glyphosate is considered as “difficult herbicide” in terms of trace analysis. It has low molecular weight, low volatility, thermal lability, and good water solubility. These properties cause problems in its extraction, purification, and detection. The determination often requires additional processes that may allow quantification by chromatographic methods. Several analytical procedures have been developed based on solid-phase extraction, ion-exchange chromatography, or matrix solid phase dispersion. Most published methods involve liquid extraction followed by clean-up. This review would like to revise the literature on this issue discussing the relevant chromatographic methods reported in the literature in terms of analytical parameters for analyzing such compound in food chain.
草甘膦是一种广泛用于农业、园艺、造林以及家庭和花园周围的农药。它是孟山都公司在20世纪70年代早期引入的,它是一种广谱、非选择性、发芽后的除草剂,可以抑制植物的莽草酸途径。草甘膦在痕量分析方面被认为是“困难的除草剂”。它具有低分子量、低挥发性、热不稳定性和良好的水溶性。这些性质给其提取、纯化和检测带来了问题。测定通常需要额外的过程,可以通过色谱方法进行定量。基于固相萃取、离子交换色谱或基质固相分散,已经开发了几种分析方法。大多数已发表的方法包括液体提取,然后进行清理。本文拟对相关文献进行修订,从分析参数方面对文献报道的相关色谱方法进行讨论,以分析食物链中该类化合物。
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引用次数: 2
Current Advances in Mass Spectrometry Imaging for Insect Physiology and Metabolism 昆虫生理代谢质谱成像研究进展
Pub Date : 2020-06-03 DOI: 10.5772/intechopen.92584
Fei-Ying Yang, Weiyi He, M. You
Research regarding the distribution of metabolites is a vital aspect of insect molecular biology. However, current approaches (e.g., liquid chromatography-mass spectrometry or immunofluorescence) have cons like requirement of massive tissues, low efficiency, and complicated operating processes. As an emerging technology, mass spectrometry imaging (MSI) can visualize the spatiotemporal distribution of molecules in biological samples without labeling. In this chapter, we retrospect the major types of in situ measurement by MSI, and the application of MSI for investigating insect endogenous and exogenous metabolites and monitoring the dynamic changes of metabolites involved with the interactions between insects and plants. Future studies that combine MSI with other genetic tools can facilitate to better explore the underlying mechanisms concerning insect physiology and metabolism.
对昆虫代谢产物分布的研究是昆虫分子生物学的一个重要方面。然而,目前的方法(如液相色谱-质谱法或免疫荧光法)存在对大量组织要求高、效率低、操作过程复杂等缺点。质谱成像(MSI)作为一种新兴技术,可以在不标记的情况下可视化生物样品中分子的时空分布。在本章中,我们回顾了MSI原位测量的主要类型,以及MSI在研究昆虫内源和外源代谢物以及监测昆虫与植物相互作用中代谢物动态变化方面的应用。未来的研究将MSI与其他遗传工具相结合,有助于更好地探索昆虫生理和代谢的潜在机制。
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引用次数: 0
The Role of Irrigation and Nitrogen Fertilization on the Feeding Behavior of European Corn Borer 灌溉和施氮对欧洲玉米螟取食行为的影响
Pub Date : 2020-05-25 DOI: 10.5772/intechopen.92598
A. Sarajlić, E. Raspudić, Z. Lončarić, M. Josipović, I. Majić
European corn borer (ECB) creates tunnels inside the plant stalks, causing damage, which could significantly decrease yield loss. This study aimed to determine the relationship between damage caused by ECB larval feeding and different irrigation and nitrogen fertilization rates on different maize genotypes. We conducted a field experiment in Croatia from 2012 to 2014. Increased plant nitrogen adsorption was observed under irrigation only in drought years, and it was decreased in optimal or extremely wet years. We found a weak or a moderate relationship between ECB damage and nitrogen concentration, but the greatest ECB damage was in all years recorded in treatments with the highest fertilization rates. However, the highest plant nitrogen concentration was observed in the hybrid with the lowest damage from ECB larvae. The maize damage caused by ECB larval feeding was negatively affected by high plant nitrogen concentrations only when plants were under drought stress. Nitrogen uptake was increased in irrigated plots. We did not find a strong relationship between the C/N ratio or irrigation and intensity of ECB damage. In 2012, when the narrowest C/N ratio was calculated, the greatest damage by ECB was measured. Further studies are needed since we detected the significant impact of drought on intensive ECB larval feeding.
欧洲玉米螟(ECB)在植物秸秆内形成隧道,造成危害,可显著降低产量损失。研究了不同灌氮量对不同基因型玉米ECB幼虫取食危害的影响。2012年至2014年,我们在克罗地亚进行了实地实验。灌溉条件下植物氮吸收量仅在干旱年增加,在最适或极湿年减少。结果表明,土壤氮素浓度与土壤氮素浓度之间存在较弱或中等的关系,但土壤氮素浓度对土壤氮素浓度的影响最大。而杂交株氮浓度最高,受ECB幼虫危害最小。只有在干旱胁迫下,高氮浓度才会对ECB幼虫取食对玉米的危害产生负向影响。灌溉区氮素吸收增加。我们没有发现C/N比率或灌溉与欧洲中央银行损害强度之间存在很强的关系。2012年,当计算出最窄的C/N比率时,欧洲央行的损失被测量出来。由于我们发现了干旱对ECB幼虫密集摄食的重大影响,因此需要进一步的研究。
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引用次数: 2
Integrated Pest Management: A Paradigm for Modern Age 害虫综合治理:现代的范例
Pub Date : 2020-05-05 DOI: 10.5772/intechopen.92283
Tamanreet Kaur, M. Kaur
Integrated pest management is an effective and environmentally sensitive approach for pest management. It plays an important role in sustainable agriculture and quality of food production by providing maximum economic yield to the farmer and also improving human health and environment. Recent developments in agricultural technology, modern communication tools, changing consumer trends, increased awareness for sustainably produced food systems, and globalization of trade and travel, have necessitated the need for the IPM paradigm as appropriate for modern times. Although the concept of integrated pest management originated almost 60 years ago, currently integrated pest management is a robust paradigm of pest control around the globe. This chapter reviews the history of integrated pest management, its main principles, and components of integrated pest management such as host plant resistance, cultural control, behavioral control, mechanical/physical control, biological control, and chemical control.
病虫害综合治理是一种有效的、对环境敏感的病虫害治理方法。它通过为农民提供最大的经济产量并改善人类健康和环境,在可持续农业和粮食生产质量方面发挥着重要作用。农业技术的最新发展、现代通讯工具、不断变化的消费趋势、对可持续生产的粮食系统的认识的提高以及贸易和旅行的全球化,使得有必要采用适合现代的IPM模式。尽管病虫害综合治理的概念起源于近60年前,但目前病虫害综合治理是全球病虫害防治的一个强有力的范例。本章回顾了害虫综合防治的历史、主要原理和害虫综合防治的组成部分,如寄主植物抗性、文化防治、行为防治、机械/物理防治、生物防治和化学防治。
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引用次数: 6
Practical Approaches to Pest Control: The Use of Natural Compounds 防治害虫的实用方法:使用天然化合物
Pub Date : 2020-04-22 DOI: 10.5772/intechopen.91792
S. Stanković, M. Kostić, Igor Kostić, S. Krnjajić
Food production is challenged by different factors: climate changes, market competitiveness, food safety, public demands, environmental challenges, new and invasive pests, etc. Intensive food production must be protected against pests, which is nowadays impossible with traditional techniques. The use of eco-friendly biopesticides based on essential oils (EOs), plant extracts (PE), and inert dusts appears to be a complementary or alternative methodology to the conventional chemically synthesized insecticides. The use of such biopesticides reduces the adverse pesticide effects on human health and environment. Biopesticides can exhibit toxic, repellent, and antifeeding effects. Development of bio-insecticides tackles the problem of food safety and residues in fresh food. Innovation within this approach is the combination of several types of active ingredients with complementary effects. Essential oils are well-known compounds with insecticide or repellent activities. New approaches, tools, and products for ecological pest management may substantially decrease pesticide use, especially in fruit and vegetable production. A win-win strategy is to find an appropriate nature-based compound having impact on pests, together with pesticide use, when unavoidable. Toxic or repellent activity could be used for pest control in the field conditions, as well as attractiveness of some compounds for mass trapping, before pests cause significant economic damage.
粮食生产受到不同因素的挑战:气候变化、市场竞争、食品安全、公众需求、环境挑战、新的和入侵的害虫等。集约化粮食生产必须防止害虫,这是目前用传统技术无法做到的。基于精油(EOs)、植物提取物(PE)和惰性粉尘的生态友好型生物农药的使用似乎是传统化学合成杀虫剂的补充或替代方法。这类生物农药的使用减少了农药对人类健康和环境的不利影响。生物农药具有毒性、驱避和驱食作用。生物杀虫剂的发展解决了食品安全和新鲜食品残留问题。这种方法的创新之处在于将几种具有互补作用的活性成分结合在一起。精油是众所周知的具有杀虫或驱避作用的化合物。生态有害生物管理的新方法、工具和产品可能会大大减少农药的使用,特别是在水果和蔬菜生产中。一个双赢的策略是在不可避免的情况下,找到一种对害虫有影响的适当的天然化合物,同时使用杀虫剂。在害虫造成重大经济损失之前,可以利用有毒或驱避活性在田间条件下控制害虫,以及一些化合物对大规模诱捕的吸引力。
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引用次数: 13
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Pests, Weeds and Diseases in Agricultural Crop and Animal Husbandry Production
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