Data underlying the publication: Crop species diversity levels with attract and reward strategies to enhance Pieris brassicae parasitism rate by Cotesia glomerata in strip intercropping

This data belongs to the paper published in Functional Ecology, with the title: Crop species diversity levels with attract and reward strategies to enhance Pieris brassicae parasitism rate by Cotesia glomerata in strip intercropping. See the published paper and the readme files for information on methods, techniques and other relevant information.<br>Abstract:We assessed parasitism rates of released large cabbage white (<em>Pieris brassicae)</em> caterpillars by parasitoids on white cabbage (<em>Brassica oleracea</em>) plants in six different cropping systems: four different strip cropping designs, a pixel cropping design and a monoculture. These cropping designs differed in the number of crops included, the use of parasitoid attractive cultivars in concurrence with a cash cultivar, the use of nectar-providing crops for adult parasitoids, and the spatial arrangement of the crops. Parasitism rate by the main <em>P. brassicae </em>parasitoid <em>Cotesia glomerata</em> was enhanced by strip cropping of white cabbage with wheat, and even further enhanced by the inclusion of four more main crops. Contrastingly, <em>C. glomerata </em>parasitism rate was lower in the most intensive crop mixture, i.e., pixel cropping, than in any of the strip cropping designs. The use of attractive cultivars or rewarding floral resources within a strip cropping set-up did not significantly further enhance <em>C. glomerata </em>parasitism rate.

本数据集源自发表于《功能生态学（Functional Ecology）》的一篇学术论文，论文标题为《条带间作模式下采用引诱与奖赏策略提升菜粉蝶绒茧蜂（Cotesia glomerata）对大菜粉蝶（Pieris brassicae）寄生率的作物物种多样性配置》。有关研究方法、实验技术及其他相关信息，请参阅已发表论文与自述（readme）文件。
摘要：本研究在6种不同种植系统中评估了寄生蜂对白甘蓝（Brassica oleracea）植株上释放的大菜粉蝶（Pieris brassicae）幼虫的寄生率，这6种种植系统包括4种不同的条带间作设计、1种像素间作设计以及1种单作系统。这些种植设计的差异体现在：所纳入的作物种类数量、与经济品种配套使用的寄生蜂引诱型品种、为寄生蜂成虫提供花蜜的蜜源作物，以及作物的空间排布方式。
大菜粉蝶的主要寄生蜂——菜粉蝶绒茧蜂（Cotesia glomerata）的寄生率在白甘蓝与小麦条带间作模式下得到提升，若再额外搭配4种主栽作物，寄生率可进一步提高。与之相反，在种植密度最高的混合种植模式（即像素间作模式）中，菜粉蝶绒茧蜂的寄生率低于所有条带间作设计模式。在条带间作体系中使用引诱型品种或奖赏性蜜源资源，并未显著进一步提升菜粉蝶绒茧蜂的寄生率。