Scott Donald, Scholes Julie Diane, Randrianjafizanaka Meva Tahiry, Randriamampianina Jean Augustin, Autfray Patrice, Freckleton Robert P
Department of Animal & Plant Sciences University of Sheffield Sheffield UK.
University of Antananarivo Antananarivo Madagascar.
Ecol Evol. 2021 Sep 12;11(19):13579-13592. doi: 10.1002/ece3.8085. eCollection 2021 Oct.
Infestations by the parasitic weed genus result in significant losses to cereal crop yields across sub-Saharan Africa. The problem disproportionately affects subsistence farmers who frequently lack access to novel technologies. Effective management therefore requires the development of strategies utilizing existing cultural management practices. We report a multiyear, landscape-scale monitoring project for in the mid-west of Madagascar, undertaken over 2019-2020 with the aims of examining cultural, climatic, and edaphic factors currently driving abundance and distribution. Long-distance transects were established across the middle-west region of Madagascar, over which abundance in fields was estimated. Analysis of the data highlights the importance of crop variety and legumes in driving density. Moreover, the dataset revealed significant effect of precipitation seasonality, mean temperature, and altitude in determining abundance. A composite management index indicated the effect of a range of cultural practices on changes in abundance. The findings support the assertion that single measures are not sufficient for the effective, long-term management of . Furthermore, the composite score has potential as a significant guide of integrated management beyond the geographic range of this study.
寄生杂草属的侵染给撒哈拉以南非洲的谷类作物产量造成了重大损失。这个问题对经常无法获得新技术的自给农民影响尤为严重。因此，有效的管理需要制定利用现有栽培管理措施的策略。我们报告了一个在马达加斯加中西部开展的为期多年的景观尺度的监测项目，该项目在2019 - 2020年期间进行，目的是研究当前影响其丰度和分布的栽培、气候和土壤因素。在马达加斯加中西部地区设置了长距离样带，据此估计田间的丰度。数据分析突出了作物品种和豆类在驱动密度方面的重要性。此外，数据集显示降水季节性、平均温度和海拔在决定丰度方面有显著影响。一个综合管理指数表明了一系列栽培措施对丰度变化的影响。这些发现支持了单一措施不足以有效、长期管理的观点。此外，综合得分有可能作为本研究地理范围之外综合管理的重要指南。
