Branched broomrape (Phelipanche ramosa (L.) Pomel) is a parasitic plant, which causes severe yield losses in major crops worldwide. Because of its broad host range, including numerous non-parasitic weed species, the persistence of its seeds in the soil, and the poor efficiency of available management techniques, broomrape management is complex. The objective of the present paper was to develop a broomrape-dynamics model to support the design of management strategies combining multiple techniques aiming at long-term control of broomrape. Towards this goal, we developed a simulation model with formalisms and parameters based on data from our own experiments and the literature. This model called PheraSys combines 1) a demographic submodel to predict broomrape seed bank dynamics, 2) a trophic-relationships submodel to predict the effect of parasitism on crops and weeds, and 3) a submodel of weed dynamics in agroecosystems to predict the growth of crops and weeds from cropping techniques and pedoclimate. Thanks to an individual representation of each host plant, PheraSys is able to simulate complex heterogeneous canopies. This model can be used as a tool to test management strategies including crop mixtures and relying on biological regulations by weeds.

分枝扫帚菜( Phelipanche ramosa (L.) Pomel) 是一种寄生植物，会导致世界范围内主要作物的严重减产。由于其寄主范围广泛，包括许多非寄生性杂草种类、其种子在土壤中的持久性以及可用管理技术的低效率，扫帚管理是复杂的。本论文的目的是开发一个扫帚动力学模型，以支持结合多种技术的管理策略设计，旨在长期控制扫帚。为了实现这一目标，我们根据我们自己的实验和文献中的数据开发了一个带有形式主义和参数的模拟模型。这个型号叫PheraSys结合 1) 人口统计子模型来预测扫帚种子库动态，2) 营养关系子模型来预测寄生对作物和杂草的影响，以及 3) 农业生态系统中的杂草动态子模型来预测作物和杂草的生长种植技术和土壤气候。由于每个寄主植物的单独表示，PheraSys能够模拟复杂的异构树冠。该模型可用作测试管理策略的工具，包括混合作物和依赖杂草的生物调节。