Department of Landscape Architecture, College of Agriculture and Forestry Ecology, Shaoyang University, Shaoyang, China.
College of Food and Chemical Engineering, Shaoyang University, Shaoyang, China.
Pest Manag Sci. 2023 Jul;79(7):2390-2396. doi: 10.1002/ps.7416. Epub 2023 Mar 8.
Plant domestication can alter plant and insect interactions and influence bottom-up and top-down effects. However, little is known about the effects of wild, local, and cultivated varieties of the same plant species in the same region on herbivores and their parasitoids. Here, six tobacco varieties were selected: wild Bishan and Badan tobaccos, local Liangqiao and Shuangguan sun-cured tobaccos, and cultivated Xiangyan 5 and Cunsanpi. We examined how wild, local, and cultivated tobacco types affect the tobacco cutworm herbivore Spodoptera litura and its parasitoid Meteorus pulchricornis.
Levels of nicotine and trypsin protease inhibitor in leaves and the fitness of S. litura larvae varied significantly among the varieties. Wild tobacco had the highest levels of nicotine and trypsin protease inhibitor, which reduced the survival rate and prolonged the development period of S. litura. The tobacco types significantly influenced the life history parameters and host selection of M. pulchricornis. The cocoon weight, cocoon emergence rate, adult longevity, hind tibia length, and offspring fecundity of M. pulchricornis increased, whereas the development period decreased from wild to local to cultivated varieties. The parasitoids were more likely to select wild and local varieties than cultivated varieties.
Domestication of tobacco resulted in reduced resistance to S. litura in cultivated tobacco. Wild tobacco varieties suppress S. litura populations, adversely affect M. pulchricornis, and may enhance bottom-up and top-down control of S. litura. © 2023 Society of Chemical Industry.
植物驯化可以改变植物与昆虫的相互作用，并影响自上而下和自下而上的效应。然而，对于同一地区同一植物物种的野生、本地和栽培品种对食草动物及其寄生蜂的影响知之甚少。在这里，选择了六种烟草品种：野生璧山和巴山烟草、本地梁桥和双关太阳晒烟，以及栽培的湘烟 5 号和寸三皮。我们研究了野生、本地和栽培烟草类型如何影响烟草夜蛾食草动物斜纹夜蛾及其寄生蜂 Meteorus pulchricornis。
叶片中尼古丁和胰蛋白酶蛋白酶抑制剂的水平以及斜纹夜蛾幼虫的适应性在品种间差异显著。野生烟草具有最高水平的尼古丁和胰蛋白酶蛋白酶抑制剂，这降低了斜纹夜蛾的存活率并延长了其发育周期。烟草类型显著影响了 M. pulchricornis 的生活史参数和宿主选择。M. pulchricornis 的茧重、茧出率、成虫寿命、后跗骨长度和后代产卵量增加，而发育周期从野生到本地到栽培品种减少。寄生蜂更倾向于选择野生和本地品种而不是栽培品种。
烟草的驯化导致栽培烟草对斜纹夜蛾的抗性降低。野生烟草品种抑制斜纹夜蛾种群，对 M. pulchricornis 产生不利影响，并可能增强斜纹夜蛾的自上而下和自下而上的控制。 © 2023 化学工业协会。
