Research Centre in Digitalization and Intelligent Robotics (CeDRI), Instituto Politécnico de Bragança, Bragança, Portugal.
Mountain Research Center (CIMO), Instituto Politécnico de Bragança, Bragança, Portugal.
PLoS One. 2021 Jul 21;16(7):e0254193. doi: 10.1371/journal.pone.0254193. eCollection 2021.
In recent years, the Asian gall wasp Dryocosmus kuriphilus has invaded chestnut trees and significantly affected the Portuguese chestnut production. Studies in other countries, such as Japan or Italy, have shown that the parasitoid Torymus sinensis can successfully achieve biological control of D. kuriphilus. Mathematical models help us to understand the dynamics of the interaction between the pest D. kuriphilus and its parasitoid T. sinensis and, consequently, they can help to implement measures that enhance crop pest management. In this work, the evolution of the density of D. kuriphilus and T. sinensis across time and space is studied through the numerical solution of models that include parameters based on observations made in Portugal. Simultaneous releases of the parasitoid are simulated at various locations and at different times. The results indicate that, in the case of a small and homogeneous orchard, biological control can be effective, but, in the case of extensive domains, the pest control is much more difficult to achieve. In order for biological control to be efficient, it is necessary to implement, in each chestnut-producing region, a collective strategy based on the annual monitoring of infestation levels.
近年来，亚洲栗瘿蜂已入侵栗树，对葡萄牙栗的生产造成了重大影响。在其他国家（如日本或意大利）的研究表明，肿腿蜂 Torymus sinensis 可以成功实现对 D. kuriphilus 的生物控制。数学模型有助于我们理解害虫 D. kuriphilus 和其寄生蜂 T. sinensis 之间的相互作用动态，从而可以帮助实施增强作物害虫管理的措施。在这项工作中，通过数值求解基于葡萄牙观测值的模型来研究 D. kuriphilus 和 T. sinensis 的密度随时间和空间的演变。在不同地点和不同时间模拟同时释放寄生蜂。结果表明，在小而均匀的果园中，生物防治可能是有效的，但在广泛的区域，控制害虫更加困难。为了使生物防治有效，有必要在每个板栗生产地区实施基于年度虫害水平监测的集体策略。
