Patterns, processes and scales shaping invasive pest species dynamics within agricultural landscapes: Modelling the spread of the African citrus psyllid in European lemon orchards

IF 6.1 1区农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY

Agricultural Systems Pub Date : 2025-03-17 DOI:10.1016/j.agsy.2025.104295

Pedro Nunes , Manuela Branco , José Carlos Franco , Mário Santos

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引用次数: 0

Abstract

CONTEXT

The African citrus psyllid, Trioza erytreae (Del Guercio) (Hemiptera, Triozidae), is an invasive pest recently introduced into Europe, showing a particular preference for lemon trees (Citrus × limon (L.) Osbeck). It is also a vector of huanglongbing, the most damaging citrus disease, caused by the bacteria Candidatus liberibacter. Understanding the psyllid's spread dynamics across the landscape is crucial for future management and control of this pest.

OBJECTIVE

A novel spatio-temporal modelling approach was developed to understand the spread dynamics of T. erytreae, and assess the effectiveness of insecticide management strategies in controlling its dispersal.

METHODS

The study divided the landscape into patches representing specific land use/cover types. The spread of T. erytreae was simulated using a susceptible-infested-susceptible model, an adaptation of epidemiological approaches for landscape/agronomic contexts. The model's performance was evaluated by comparing simulation results with field observations. Additionally, the effectiveness of management strategies was tested by simulating the spread of the species in the landscape, with and without insecticide spraying.

RESULTS AND CONCLUSIONS

Scattered citrus trees in residential areas were found to play a significant role towards the dispersal of T. erytreae, counteracting the effects of lemon orchard fragmentation and management strategies. Insecticide applications reduced the overall abundance of the psyllid but had no significant impact on its dispersal. Even under an extreme and intensive chemical control scenario, the probability of eradication was low, with only 25 % of simulations achieving eradication. The results obtained highlight the influence of the interplay between the landscape structure and management practices in the dynamics of pest species dispersal.

SIGNIFICANCE

This study presents a novel method for modelling the population dynamics of multivoltine species in the scope of understanding the factors influencing their spread in agricultural landscapes. The insights gained could improve management strategies and planning, particularly the effectiveness of management strategies, with potential applicability to other pests and contexts.

Abstract Image

查看原文本刊更多论文

农业景观中形成入侵害虫物种动态的模式、过程和尺度：模拟非洲柑橘木虱在欧洲柠檬果园的传播

背景非洲柑橘木虱Trioza erytreae (Del Guercio)（半翅目，柑橘科）是最近传入欧洲的一种入侵害虫，对柠檬树（citrus × limon (L.)）表现出特别的偏好。等)。它也是黄龙病的载体，黄龙病是柑橘最具破坏性的疾病，由游离念珠菌引起。了解木虱在整个景观中的传播动态对未来管理和控制这种害虫至关重要。目的建立一种新的时空建模方法，以了解白杨的传播动态，并评估杀虫剂管理策略对白杨扩散的控制效果。方法将景观划分为不同的斑块，代表不同的土地利用/覆被类型。采用易感-侵染-易感模型（一种适应景观/农艺环境的流行病学方法）模拟了T. erytree的传播。通过与现场观测结果的比较，对模型的性能进行了评价。此外，通过模拟在有和没有杀虫剂喷洒的情况下该物种在景观中的传播，测试了管理策略的有效性。结果与结论居民点散布的柑橘树对赤树的扩散起着显著的作用，抵消了柠檬园破碎化和管理策略的影响。施用杀虫剂降低了木虱的总体丰度，但对其扩散没有显著影响。即使在极端和密集的化学控制情景下，根除的可能性也很低，只有25%的模拟实现了根除。研究结果强调了景观结构和管理措施之间的相互作用对害虫物种扩散动态的影响。意义本研究提出了一种新的方法来模拟多伏特物种的种群动态，以了解影响其在农业景观中传播的因素。所获得的见解可以改善管理战略和规划，特别是管理战略的有效性，并可能适用于其他有害生物和环境。

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来源期刊

Agricultural Systems 农林科学-农业综合

CiteScore

13.30

自引率

7.60%

发文量

174

审稿时长

30 days

期刊介绍： Agricultural Systems is an international journal that deals with interactions - among the components of agricultural systems, among hierarchical levels of agricultural systems, between agricultural and other land use systems, and between agricultural systems and their natural, social and economic environments. The scope includes the development and application of systems analysis methodologies in the following areas: Systems approaches in the sustainable intensification of agriculture; pathways for sustainable intensification; crop-livestock integration; farm-level resource allocation; quantification of benefits and trade-offs at farm to landscape levels; integrative, participatory and dynamic modelling approaches for qualitative and quantitative assessments of agricultural systems and decision making; The interactions between agricultural and non-agricultural landscapes; the multiple services of agricultural systems; food security and the environment; Global change and adaptation science; transformational adaptations as driven by changes in climate, policy, values and attitudes influencing the design of farming systems; Development and application of farming systems design tools and methods for impact, scenario and case study analysis; managing the complexities of dynamic agricultural systems; innovation systems and multi stakeholder arrangements that support or promote change and (or) inform policy decisions.