Heng-Moss Tiffany M, Baxendale Frederick P, Riordan Terrance P, Young Linda, Lee Kit
Department of Entomology, University of Nebraska, Lincoln, NE 68583, USA.
J Econ Entomol. 2003 Dec;96(6):1942-51. doi: 10.1093/jee/96.6.1942.
Choice and no-choice studies were conducted to determine the categories (antibiosis, antixenosis, and tolerance) of resistance of four buffalograsses (NE91-118, 'Bonnie Brae', 'Cody', and 'Tatanka') previously identified as resistant to the western chinch bug, Blissus occiduus Barber. Antibiosis studies found no significant differences in western chinch bug fecundity, nymphal development, or survival among the resistant and susceptible buffalograsses. Tolerance studies indicated that NE91-118, Cody, and Tatanka exhibited moderate-to-high levels of tolerance based on western chinch bug damage ratings and plant height, whereas Bonnie Brae exhibited moderate-to-low levels of tolerance. Choice studies indicated the presence of antixenosis in NE91-118, whereas Cody and Tatanka showed little or no antixenosis. Scanning electron microscopy was used to disclose morphological differences between NE91-118 (resistant) and '378' (susceptible). The epicuticular wax structures and trichome densities were similar between 378 and NE91-118, suggesting that morphological structures do not contribute to NE91-118 antixenosis.
开展了选择性和非选择性研究，以确定四种野牛草（NE91 - 118、“邦妮·布雷”、“科迪”和“塔坦克”）的抗性类别（抗菌性、抗生性和耐受性），这四种野牛草先前已被确定对西部牧草盲蝽（Blissus occiduus Barber）具有抗性。抗菌性研究发现，在抗性和敏感野牛草之间，西部牧草盲蝽的繁殖力、若虫发育或存活率没有显著差异。耐受性研究表明，基于西部牧草盲蝽危害评级和株高，NE91 - 118、科迪和塔坦克表现出中等到高水平的耐受性，而邦妮·布雷表现出中等到低水平的耐受性。选择性研究表明NE91 - 118存在抗生性，而科迪和塔坦克几乎没有或不存在抗生性。使用扫描电子显微镜揭示NE91 - 118（抗性）和“378”（敏感）之间的形态差异。378和NE91 - 118之间的表皮蜡质结构和毛状体密度相似，这表明形态结构对NE91 - 118的抗生性没有贡献。
