Jeon Jungwon, Rahman Md-Mafizur, Han Changhee, Shin Jiyeong, Sa Kyu Jin, Kim Juil
Interdisciplinary Graduate Program in Smart Agriculture, Kangwon National University, Chuncheon 24341, Republic of Korea.
Agriculture and Life Sciences Research Institute, Kangwon National University, Chuncheon 24341, Republic of Korea.
Insects. 2023 Apr 4;14(4):358. doi: 10.3390/insects14040358.
The fall armyworm (, FAW) is an invasive migratory pest that has recently spread to Korea, damaging several corn cultivars with significant economic value. Comparisons of the growth stages of FAW were conducted based on the preferred feed. Therefore, we selected six maize cultivars, including three categories: (i) commercial waxy corn (mibaek 2-ho, heukjeom 2-ho, dreamoak); (ii) popcorn (oryun popcorn, oryun 2-ho); and (iii) processing corn (miheukchal). A significant effect was observed during the larvae period, pupal period, egg hatching ratio, and larvae weight, whereas the total survival period and adult period did not show significant variation among the tested corn cultivars. We identified variations in the FAW gut bacterial community that were dependent on the genotype of the corn maize feed. The identified phyla included Firmicutes, Proteobacteria, Actinobacteria, and Bacteroidetes. Among these genera, the most abundant bacterial genus was , followed by . was the most abundant among the top 40 bacterial species. The intergenic PCR-based amplification and gene sequence of the colony isolates were also matched to the GenBank owing to the prevalence of . These results showed that the bacterial diversity and abundance of particular bacteria in the guts of FAWs were influenced by the six major maize corn cultivars.
草地贪夜蛾（FAW）是一种入侵性迁飞害虫，最近已传播到韩国，对几种具有重要经济价值的玉米品种造成了损害。基于偏好的饲料对草地贪夜蛾的生长阶段进行了比较。因此，我们选择了六个玉米品种，包括三类：（i）商业糯玉米（米白2号、黑晶2号、梦橡）；（ii）爆米花（奥林爆米花、奥林2号）；以及（iii）加工玉米（米黑察尔）。在幼虫期、蛹期、卵孵化率和幼虫体重方面观察到显著影响，而在测试的玉米品种中，总生存期和成虫期没有显示出显著差异。我们确定了草地贪夜蛾肠道细菌群落的变化取决于玉米饲料的基因型。鉴定出的门包括厚壁菌门、变形菌门、放线菌门和拟杆菌门。在这些属中，最丰富的细菌属是 ，其次是 。在40种最丰富的细菌物种中， 最为丰富。由于 的普遍存在，基于基因间PCR的菌落分离物扩增和基因序列也与GenBank匹配。这些结果表明，六种主要玉米品种影响了草地贪夜蛾肠道中细菌的多样性和特定细菌的丰度。
