NDVI

NDVI
  • 文章类型: Journal Article
    住宅绿色被认为对人体健康有益,在以前的研究中已经发现了它与呼吸功能的关联。然而,它与肺炎的联系仍不清楚。探讨住宅绿化与突发肺炎的关系,我们基于英国生物银行的参与者进行了一项前瞻性队列研究,继2006年至2010年至2019年底。在500m和1000m缓冲区内,通过归一化植被指数(NDVI)测量了住宅的绿色。Cox比例风险模型进行评估的关联,并建立了有限的三次样条模型来估计它们的暴露-响应关系。结果表明,住宅绿色与肺炎事件的风险呈负相关。NDVI500-m缓冲液的四分位数(IQR)增加与4%相关[HR(95%CI)=0.96(0.94,0.97),P<0.001]降低肺炎事件的风险。与最低绿度四分位数(Q1)相比,最高四分位数(Q4)的肺炎发生率较低,HR(95%CI)估计为0.91(0.87,0.95)(P值<0.001)。基于NDVI1000-m缓冲液的分析获得了类似的结果。此外,发现按年龄和收入进行的修改对住宅绿色度和突发肺炎之间的联系产生了显着影响。这些发现提出了潜在的有效预防突发肺炎的方法,为促进住宅绿色化建设提供了科学依据。
    Residential greenness is considered beneficial to human health, and its association with respiratory function has been found in previous studies. However, its link with pneumonia remains unclear. To explore the association of residential greenness with incident pneumonia, we conducted a prospective cohort study based on participants of the UK Biobank, followed from 2006 to 2010 to the end of 2019. Residential greenness was measured by Normalized Difference Vegetation Index (NDVI) within 500 m and 1000 m buffer. Cox proportional hazard models were conducted to assess the association, and restricted cubic spline models were also constructed to estimate their exposure-response relationship. Results demonstrate that residential greenness was negatively related to the risk of incident pneumonia. An interquartile (IQR) increase in NDVI 500-m buffer was associated with 4 % [HR (95 % CI) =0.96 (0.94, 0.97), P < 0.001] lower risk of incident pneumonia. Compared to the lowest greenness quartile (Q1), the highest quartile (Q4) had a lower risk of incident pneumonia, with the HR (95 % CI) estimated to be 0.91 (0.87, 0.95) (P values <0.001). Analyses based on NDVI 1000-m buffer obtained similar results. Furthermore, a significant effect of modifications by age and income on the linkage between residential greenness and incident pneumonia was found. These findings propose a potential effective prevention of incident pneumonia and provide the scientific basis for promoting the construction of residential greenness.
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  • 文章类型: Journal Article
    植被健康指数(VHI)是用于评估植被健康和状况的指标,基于卫星衍生数据。它提供了压力或活力的综合指标,常用于农业,生态学,和环境监测,以预测植被健康变化。尽管有其优势,很少有关于预测VHI作为未来预测的研究,特别是使用最新有效的机器学习方法。因此,本研究的主要目的是利用遥感图像预测VHI值。为了实现这一目标,该研究提出采用组合的卷积神经网络(CNN)和一种称为长短期记忆(LSTM)的特定类型的循环神经网络(RNN),被称为ConvLSTM。VHI时间序列图像是根据从Terra和Aqua卫星上的中分辨率成像光谱仪(MODIS)获得的归一化植被指数(NDVI)和地表温度(LST)数据计算的。除了传统的基于图像的计算,该研究建议使用NDVI和LST时间序列的全球最小值和全球最大值(全球范围)来计算VHI。研究结果表明,具有1层结构的ConvLSTM通常比2层和3层结构提供更好的预测。1步的平均均方根误差(RMSE)值,2步,和提前3步的VHI预测分别为0.025、0.026和0.026,每个步骤代表一个8天的预测范围。此外,所提出的使用应用的ConvLSTM结构的全局比例模型优于传统的VHI计算方法。
    The Vegetation Health Index (VHI) is a metric used to assess the health and condition of vegetation, based on satellite-derived data. It offers a comprehensive indicator of stress or vigor, commonly used in agriculture, ecology, and environmental monitoring for forecasting changes in vegetation health. Despite its advantages, there are few studies on forecasting VHI as a future projection, particularly using up-to-date and effective machine learning methods. Hence, the primary objective of this study is to forecast VHI values by utilizing remotely sensed images. To achieve this objective, the study proposes employing a combined Convolutional Neural Network (CNN) and a specific type of Recurrent Neural Network (RNN) called Long Short-Term Memory (LSTM), known as ConvLSTM. The VHI time series images are calculated based on the Normalized Difference Vegetation Index (NDVI) and Land Surface Temperature (LST) data obtained from the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Terra and Aqua satellites. In addition to the traditional image-based calculation, the study suggests using global minimum and global maximum values (global scale) of NDVI and LST time series for calculating the VHI. The results of the study showed that the ConvLSTM with a 1-layer structure generally provided better forecasts than 2-layer and 3-layer structures. The average Root Mean Square Error (RMSE) values for the 1-step, 2-step, and 3-step ahead VHI forecasts were 0.025, 0.026, and 0.026, respectively, with each step representing an 8-day forecast horizon. Moreover, the proposed global scale model using the applied ConvLSTM structures outperformed the traditional VHI calculation method.
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  • 文章类型: Journal Article
    为了应对全球日益增长的粮食需求,实施可持续农业实践至关重要,其中包括有效的土壤管理技术,以提高生产力和环境条件。在这方面,进行了一项研究,以评估利用卫星数据得出的物候指标的有效性,以便在半干旱地区绘制和确定合适的农业土壤。比较了两种不同的方法:一种基于土壤理化参数,另一种通过应用归一化植被指数(NDVI)Modis时间序列利用植被的物候响应。研究结果表明,基于NDVI的方法成功地确定了特定类别的农业土壤适宜性(称为S1),这些土壤适宜性无法使用依赖于土壤理化参数的多标准分析(MCAD)方法进行有效映射。这种S1类土壤适宜性约占总研究区域的5%。这些结果表明,与MCAD相比,基于物候的方法为时空监测土壤适宜性状态提供了更大的潜力,严重依赖离散观测,需要频繁更新土壤参数。为绘制土壤适宜性而开发的方法是可持续农业发展的宝贵工具,它可以在确保粮食安全和进行土地农业评估方面发挥有效作用。
    To address the increasing global demand for food, it is crucial to implement sustainable agricultural practices, which include effective soil management techniques for enhancing productivity and environmental conditions. In this regard, a study was conducted to assess the efficacy of utilizing phenological metrics derived from satellite data in order to map and identify suitable agricultural soil within a semi-arid region. Two distinct methodologies were compared: one based on physicochemical soil parameters and the other utilizing the phenological response of vegetation through the application of the Normalized Difference Vegetation Index (NDVI) Modis-time series. The study findings indicated that the NDVI-based approach successfully identified a specific class of soil suitability for agriculture (referred to as S1) that could not be effectively mapped using the multi-criteria analysis (MCAD) method relying on soil physicochemical parameters. This S1 class of soil suitability accounted for approximately 5 % of the total study area. These outcomes suggest that phenological-based approaches offer greater potential for spatio-temporal monitoring of soil suitability status compared to MCAD, which heavily relies on discrete observations and necessitates frequent updates of soil parameters. The approach developed to map the soil-suitability is a valuable tool for sustainable agricultural development, and it can play an effective role in ensuring food security and conducting a land agriculture assessment.
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  • 文章类型: Journal Article
    林冠密度(FCD)是评价森林生态健康的重要指标之一。它在评估森林健康方面发挥着重要作用,并成为潜在管理行动的关键里程碑。冠层覆盖率或树冠覆盖率是指被树冠的垂直投影覆盖的森林地面的百分比,并且是监测森林状况所必需的。本研究旨在通过SENTINEL2A卫星数据,通过2016年至2022年期间的Sathyamangalam森林地理空间技术估算森林冠层密度(FCD)。用生物物理参数实现了加权叠加分析方法,即,归一化植被指数(NDVI),先进植被指数(AVI),阴影指数(SI),和土壤认知度指数(SBI)来分析森林状况及其活动。结果显着观察到,2016年的森林冠层为158.60km2,2018年增加到190.37km2(1.14%),然后在2020年突然减少到134.85km2(2.47%)。在2021-2022年期间,通过更好的环境条件(1.52%),森林冠层恢复了部分原始面积,面积为168.83km2。因此,地理空间技术在估计区域森林的最新变化中起着重要作用。
    The term forest canopy density (FCD) refers to one of the important criteria used to evaluate forest\'s ecological health. It plays a significant role in assessing the health of the forest and serves as a key landmark for potential management actions. The canopy coverage or crown cover is referred to the percentage of the forest floor that is covered by the vertical projection of tree crowns and necessary for monitoring the condition of the forest. The present study aims to estimate the forest canopy density (FCD) through Geospatial Techniques for Sathyamangalam Forest for the period between 2016 and 2022 with SENTINEL 2A satellite data. The weighted overlay analysis method was implemented with biophysical parameters, namely, Normalize Difference Vegetation Index (NDVI), Advanced Vegetation Index (AVI), Shadow Index (SI), and Soil Bareness Index (SBI) to analyze the state of the forest and its activity. The results observed significantly that the forest canopy with 158.60 km2 in 2016 which is increased to 190.37 km2 in 2018 (1.14%) then suddenly decreased to 134.85 km2 in 2020 (2.47%). The forest canopy has recovered some of its original area with 168.83 km2 through better environmental conditions during 2021-2022 (1.52%). Therefore, Geospatial Technology plays a significant role in estimating recent changes in regional forest.
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  • 文章类型: Journal Article
    城市绿地有益于物质,心理健康,并降低心血管疾病的风险。一项在考纳斯的研究,立陶宛收集了2006-2009年期间100例有症状心力衰竭(HF)患者的健康数据。通过归一化植被指数(NDVI)测量住宅的绿度。我们评估了6个月后绿色对健康指标和健康指标变化的影响。基于NDVI1-km半径的较高的绿色水平与较高的心率(HR)和射血分数的平均值以及较低的左心室(LV)舒张末期直径指数(LVEDDI)有关。左心室收缩末期容积(ESV),左心房大小(LAS),和基线时的右心房大小(RAS)。六个月后,DBP和HR的降低以及肺活量参数的改善与暴露于高水平绿色相关.长期康复组的肺活量测量指标发生了显着变化。结果证实,居住环境的绿色可以改善HF患者的健康指标。
    Urban green spaces benefit physical, mental health, and reduses the risk of cardiovascular disease. A study in Kaunas, Lithuania collected health data from 100 patients with symptomatic heart failure (HF) during 2006-2009. Residential greenness was measured by the normalized difference vegetation index (NDVI). We assessed the impact of greenness on health indicators and on changes in health markers after 6 months. Higher greenness levels based on the NDVI 1-km radius were related to higher mean values of heart rate (HR) and ejection fraction and lower left ventricular (LV) end-diastolic diameter index (LV EDDI), LV end-systolic volume (ESV), left atrium size (LAS), and right atrium size (RAS) at baseline. After 6 months, a decrease in DBP and HR and an improvement in spiroergometric parameters were associated with exposure to high levels of greenness.  The long-term rehabilitation group experienced significant changes in spiroergometric indicators. The results confirm that the greenness of the residential environment can improve health indicators in patients with HF.
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  • 文章类型: Journal Article
    尽管空气污染和绿色与乳腺癌风险的关系很重要,该主题尚未在全球范围内进行调查。我们使用来自162个国家的7年数据进行了一项生态研究。残疾调整寿命年(DALYs)和发病率数据被用来代表乳腺癌疾病负担。直径<2.5μm的颗粒物(PM2.5),臭氧(O3)二氧化氮(NO2),并采用归一化植被指数(NDVI)作为我们的暴露量。我们采用广义线性混合模型来探索空气污染与绿色对乳腺癌疾病负担的关系。比率(RR)及其95%置信区间(CI)表示效应大小。空气污染与乳腺癌疾病的负担之间存在正相关。相反,NDVI的每四分位间距增量与DALY和发病率呈负相关。在空气污染物和乳腺癌方面,NDVI似乎对这两个条件之间的关系有显著影响。较高的绿色度有助于减轻空气污染对乳腺癌的负面影响。PM2.5和O3在绿色与乳腺癌疾病负担的关系中起中介作用。在绿色水平较高的地区,空气污染物与乳腺癌负担之间的负相关有可能受到影响.
    Despite the significance of the associations of air pollution and greenness with the risk of breast cancer, this topic has not been investigated on a global scale. We conducted an ecological study using 7 years of data from 162 countries. Disability-adjusted life years (DALYs) and incidence data were used to represent the breast cancer disease burden. Particulate matter with a diameter < 2.5 μm (PM2.5), ozone (O3), nitrogen dioxide (NO2), and the normalized difference vegetation index (NDVI) were adopted as our exposures. We employed generalized linear mixed models to explore the relationship between air pollution and greenness on breast cancer disease burden. The rate ratio (RR) and its 95% confidence interval (CI) indicate the effect size. There is a positive association between air pollution and the burden of breast cancer disease. Contrarily, per interquartile range increment in NDVI was negatively associated with DALYs and incidence. In terms of air pollutants and breast cancer, NDVI seems to have a significant influence on the relationship between these two conditions. A higher amount of greenness helps to alleviate the negative association of air pollution on breast cancer. PM2.5 and O3 play a mediating role in the relationship between greenness and breast cancer disease burden. In areas with higher levels of greenness, there is a possibility that the inverse association between air pollutants and the burden of breast cancer may be influenced.
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  • 文章类型: Journal Article
    虽然短期环境臭氧暴露对肺功能的不利影响是有据可查的,长期暴露的影响仍然知之甚少,尤其是成年人。
    我们旨在研究长期臭氧暴露与肺功能下降之间的关联。3014名参与者来自八个国家的17个中心,所有这些都来自欧洲共同体呼吸健康调查(ECRHS)。在大约35、44和55岁时,进行了肺活量测定以测量支气管扩张前1s的用力呼气量(FEV1)和用力肺活量(FVC)。我们将每日最大运行8小时平均臭氧浓度的年平均值分配给各个住宅地址。对PM2.5、NO2和绿色进行了调整。为了捕获与臭氧相关的肺活量测定参数的变化,我们的线性混合效应回归模型包括长期臭氧暴露和年龄之间的相互作用项.
    平均环境臭氧浓度约为65μg/m3。臭氧的四分位数范围增加了7μg/m3,这与FEV1的-2.08mL/年(95%置信区间:-2.79,-1.36)和FVC的-2.86mL/年(-3.73,-1.99)mL/年在研究期间。在调整了PM2.5、NO2和绿色度之后,关联表现强劲。这种关联在北欧居民和基线年龄较大的个体中更为明显。未检测到与FEV1/FVC比值的一致关联。
    长期暴露于升高的环境臭氧浓度与20年期间欧洲中年成年人肺活量测定肺功能的更快下降有关。
    德国研究基金会。
    UNASSIGNED: While the adverse effects of short-term ambient ozone exposure on lung function are well-documented, the impact of long-term exposure remains poorly understood, especially in adults.
    UNASSIGNED: We aimed to investigate the association between long-term ozone exposure and lung function decline. The 3014 participants were drawn from 17 centers across eight countries, all of which were from the European Community Respiratory Health Survey (ECRHS). Spirometry was conducted to measure pre-bronchodilation forced expiratory volume in 1 s (FEV1) and forced vital capacity (FVC) at approximately 35, 44, and 55 years of age. We assigned annual mean values of daily maximum running 8-h average ozone concentrations to individual residential addresses. Adjustments were made for PM2.5, NO2, and greenness. To capture the ozone-related change in spirometric parameters, our linear mixed effects regression models included an interaction term between long-term ozone exposure and age.
    UNASSIGNED: Mean ambient ozone concentrations were approximately 65 μg/m³. A one interquartile range increase of 7 μg/m³ in ozone was associated with a faster decline in FEV1 of -2.08 mL/year (95% confidence interval: -2.79, -1.36) and in FVC of -2.86 mL/year (-3.73, -1.99) mL/year over the study period. Associations were robust after adjusting for PM2.5, NO2, and greenness. The associations were more pronounced in residents of northern Europe and individuals who were older at baseline. No consistent associations were detected with the FEV1/FVC ratio.
    UNASSIGNED: Long-term exposure to elevated ambient ozone concentrations was associated with a faster decline of spirometric lung function among middle-aged European adults over a 20-year period.
    UNASSIGNED: German Research Foundation.
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  • 文章类型: Journal Article
    背景:暴露于绿色已被证明对健康有益,但是很少有研究检查住宅绿色与前列腺癌(PCa)之间的关联。我们的主要目标是确定住宅绿色的决定因素,并调查新加坡的住宅绿色是否与PCa风险相关。
    方法:以医院为基础的病例对照研究于2007年4月至2009年5月进行。新加坡前列腺癌研究(SPCS)包括240例前列腺癌病例和268例对照,他们的人口统计和居住地址是用问卷收集的。使用1km的缓冲区大小,通过参与者房屋周围的归一化植被指数(NDVI)来测量住宅的绿色。使用多变量线性回归模型确定NDVI的决定因素。使用Logistic回归模型计算NDVI与PCa风险之间关联的比值比(ORs)和95%置信区间(CIs),调整潜在的混杂因素。
    结果:BMI在第二个四分位数内,与最低四分位数相比,在调整协变量后,与较高的NDVI水平相关(β系数=0.263;95%CI=0.040-0.485)。此外,丧偶或分居,与结婚相比,与NDVI水平降低相关(β系数=-0.393;95%CI=-0.723,-0.063)。NDVI四分位距(IQR)增加与前列腺癌风险呈正相关(PCa风险的比值比[OR]=1.45;95%CI=1.02-2.07)。按肿瘤分级和分期进行的分层分析表明,较高的NDVI与较高的低度PCa风险相关。
    结论:我们的研究结果表明,新加坡的住宅绿色与PCa的高风险相关。未来对绿色空间质量和类型的研究,以及住宅绿色的其他因素,应进行与PCa风险相关的研究,以更好地理解这种关系.
    BACKGROUND: Exposure to greenness has been shown to be beneficial to health, but few studies have examined the association between residential greenness and prostate cancer (PCa) risk. Our main objectives were to identify the determinants of residential greenness, and to investigate if residential greenness was associated with PCa risk in Singapore.
    METHODS: The hospital-based case-control study was conducted between April 2007 and May 2009. The Singapore Prostate Cancer Study (SPCS) comprised 240 prostate cancer cases and 268 controls, whose demographics and residential address were collected using questionnaires. Residential greenness was measured by normalized difference vegetation index (NDVI) around the participants\' homes using a buffer size of 1 km. Determinants of NDVI were identified using a multivariable linear regression model. Logistic regression models were used to calculate the odds ratios (ORs) and 95% confidence intervals (CIs) of associations between NDVI and PCa risk, adjusting for potential confounders.
    RESULTS: Having a BMI within the second quartile, as compared to the lowest quartile, was associated with higher levels of NDVI (β-coefficient = 0.263; 95% CI = 0.040-0.485) after adjusting for covariates. Additionally, being widowed or separated, as compared to being married, was associated with lower levels of NDVI (β-coefficient = -0.393; 95% CI = -0.723, -0.063). An interquartile range (IQR) increase in NDVI was positively associated with prostate cancer risk OR = 1.45; 95% CI = 1.02-2.07). Stratified analysis by tumour grade and stage showed that higher NDVI was associated with higher risk of low grade PCa.
    CONCLUSIONS: Our findings suggested that residential greenness was associated with higher risk of PCa in Singapore. Future studies on the quality and type of green spaces, as well as other factors of residential greenness, in association with PCa risk should be conducted to better understand this relationship.
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  • 文章类型: Journal Article
    位于北纬地区,季节性气温波动较大,北方森林对气候变化很敏感,有证据表明生产率的提高和降低,取决于条件。基于光谱反射率的植被指数光学遥感提供了监测植被光合活动的手段,并为观察北方森林如何应对不断变化的环境条件提供了有力的工具。北纬或高海拔地区的基于反射的遥感光学信号容易被雪覆盖混淆,阻碍了卫星植被指数在大规模跟踪植被生产力中的应用。从卫星数据中解开雪的影响可能具有挑战性,特别是当缺乏验证数据时。在这项研究中,我们在艾伯塔省建立了一个实验系统,加拿大包括六个北方树种,常绿和落叶,评价降雪对三个植被指数的混杂效应:归一化植被指数(NDVI),光化学反射指数(PRI),和叶绿素/类胡萝卜素指数(CCI),全部用于跟踪北方森林的植被生产力。我们的结果揭示了雪对冠层反射率和植被指数的重大影响,表示为反照率增加,NDVI值降低,PRI和CCI值升高。这些影响在物种和功能组(常绿和落叶)之间有所不同,并且不同的植被指数受到不同的影响。表明矛盾,降雪对这些指数的混杂影响。除了雪的影响,我们评估了常绿和落叶物种混合林分中落叶乔木对植被指数的贡献,这有助于观察到基于绿色的指数与许多含有落叶成分的常绿为主的森林的生态系统生产力之间的关系。我们的结果表明了雪和植被类型对植被指数的混杂和相互作用的影响,并说明了在使用遥感植被指数的任何全球尺度光合作用监测工作中明确考虑雪效应的重要性。
    Located at northern latitudes and subject to large seasonal temperature fluctuations, boreal forests are sensitive to the changing climate, with evidence for both increasing and decreasing productivity, depending upon conditions. Optical remote sensing of vegetation indices based on spectral reflectance offers a means of monitoring vegetation photosynthetic activity and provides a powerful tool for observing how boreal forests respond to changing environmental conditions. Reflectance-based remotely sensed optical signals at northern latitude or high-altitude regions are readily confounded by snow coverage, hampering applications of satellite-based vegetation indices in tracking vegetation productivity at large scales. Unraveling the effects of snow can be challenging from satellite data, particularly when validation data are lacking. In this study, we established an experimental system in Alberta, Canada including six boreal tree species, both evergreen and deciduous, to evaluate the confounding effects of snow on three vegetation indices: the normalized difference vegetation index (NDVI), the photochemical reflectance index (PRI), and the chlorophyll/carotenoid index (CCI), all used in tracking vegetation productivity for boreal forests. Our results revealed substantial impacts of snow on canopy reflectance and vegetation indices, expressed as increased albedo, decreased NDVI values and increased PRI and CCI values. These effects varied among species and functional groups (evergreen and deciduous) and different vegetation indices were affected differently, indicating contradictory, confounding effects of snow on these indices. In addition to snow effects, we evaluated the contribution of deciduous trees to vegetation indices in mixed stands of evergreen and deciduous species, which contribute to the observed relationship between greenness-based indices and ecosystem productivity of many evergreen-dominated forests that contain a deciduous component. Our results demonstrate confounding and interacting effects of snow and vegetation type on vegetation indices and illustrate the importance of explicitly considering snow effects in any global-scale photosynthesis monitoring efforts using remotely sensed vegetation indices.
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  • 文章类型: Journal Article
    快速评估作物损害对于成功管理虫害暴发至关重要。在这项研究中,我们调查了无人驾驶飞机系统(UAS)和图像分析的使用,以评估甜菜夜蛾的爆发,斜纹夜蛾(Hübner)(鳞翅目:夜蛾科),发生在韩国的大豆田。部署了旋转翼UAS,以在31个大豆块上获得一系列航拍图像。这些图像被拼接在一起以生成合成图像,然后通过图像分析来量化大豆落叶。进行了经济分析,以比较航空勘测与常规地面勘测的成本。结果表明,与地面测量相比,航测精确估计落叶,在31个区块中,估计落叶率为78.3%,范围为22.4-99.8%。此外,当接受调查的目标大豆块数量超过15块时,发现航空调查和图像分析比常规地面调查更经济。OurstudyclearlydemonstratedtheeffectivenessofusinganautonomousUASandimageanalysistoconductalow-costairalsurveyofbeanoydamagecausedbyS.exiguafluenced,这可以为S.exigua管理的决策提供信息。
    Rapid assessment of crop damage is essential for successful management of insect pest outbreaks. In this study, we investigated the use of an unmanned aircraft system (UAS) and image analyses to assess an outbreak of the beet armyworm, Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae), that occurred in soybean fields in South Korea. A rotary-wing UAS was deployed to obtain a series of aerial images over 31 soybean blocks. The images were stitched together to generate composite imagery, followed by image analyses to quantify soybean defoliation. An economic analysis was conducted to compare the cost of the aerial survey with that of a conventional ground survey. The results showed that the aerial survey precisely estimated the defoliation compared to the ground survey, with an estimated defoliation of 78.3% and a range of 22.4-99.8% in the 31 blocks. Moreover, the aerial survey followed by image analyses was found to be more economical than the conventional ground survey when the number of target soybean blocks subject to the survey was more than 15 blocks. Our study clearly demonstrated the effectiveness of using an autonomous UAS and image analysis to conduct a low-cost aerial survey of soybean damage caused by S. exigua outbreaks, which can inform decision-making for S. exigua management.
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