ICAR-Indian Institute of Vegetable Research, Varanasi, 221305, UP, India.
ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012, India.
Micron. 2021 Jan;140:102957. doi: 10.1016/j.micron.2020.102957. Epub 2020 Oct 15.
The shoot and fruit borer, Earias vittella Fab. (Lepidoptera: Nolidae) is an important and most devastating insect pest on okra and cotton. The pest mainly responsible for causing significant direct damage to tender shoots and fruits of okra, flowers and green bolls of cotton causing net yield loss in both crops. Many non-chemical control strategies have been developed under the insect pest management program, A complete knowledge on the antennal morphology of E. vitella is essential for future electrophysiological and behavioural studies. In the present study, the antennal morphology and types of sensilla on the antennae of both sexes of E. vitella were examined using light and scanning electron microscopy. Nine distinct types of sensilla were identified on the antennae of both sexes: sensilla trichodea, sensilla basiconica, sensilla coeloconica, sensilla auricillica (multiporous), sensilla chaetica, uniporous peg sensilla (uniporous), sensilla styloconica, sensilla squamiformia and bohm bristles (aporous). Among all sensilla, the most widespread are multiporous sensilla trichodea with 42.90 ± 1.77/flagellomere in male and 37.38 ± 1.38/flagellomere in female. Sensilla basiconica were the second most common sensillum type in male antennae with 15.67 ± 1.92/flagellomere. Other multiporous sensilla such as auricillica (11.90 ± 0.99) and coeloconica (4.57 ± 0.25) were significantly more abundant in female than in male antennae. Results of the study provide morphological evidence that E. vitella antennae possess microscopic cuticular structures that can play a role in perception of pheromones, plant odours and other chemical stimulants. This will open up opportunities to assess the possibility of using pheromones and plant-derived compounds for the monitoring or management of E. vittella moths in the agricultural landscapes.
实蝇和果实蛀虫，Earias vittella Fab.（鳞翅目：木蠹蛾科）是秋葵和棉花上的一种重要且极具破坏性的昆虫害虫。这种害虫主要负责对秋葵的嫩梢和果实、棉花的花朵和绿铃造成严重的直接损害，导致这两种作物的净产量损失。在害虫管理计划下，已经开发了许多非化学控制策略，对 E. vitella 的触角形态有一个完整的了解对于未来的电生理学和行为学研究是必不可少的。在本研究中，使用光学和扫描电子显微镜检查了雌雄 E. vitella 触角上的触角形态和感觉类型。在雌雄触角上共鉴定出 9 种不同类型的感觉：毛形感器、刺形感器、腔锥形感器、耳形感器（多孔）、刚毛形感器、单孔刺形感器（单孔）、锥形感器、栉形感器、鳞形感器和博姆鬃毛（多孔）。在所有的感觉中，多孔的毛形感器最为广泛，雄虫每鞭节有 42.90 ± 1.77 个，雌虫有 37.38 ± 1.38 个。刺形感器是雄虫第二常见的感觉类型，每鞭节有 15.67 ± 1.92 个。其他多孔的感觉，如耳形感器（11.90 ± 0.99）和腔锥形感器（4.57 ± 0.25），在雌虫触角上的数量明显多于雄虫。研究结果提供了形态学证据，表明 E. vitella 触角具有微观的表皮结构，可以在感知信息素、植物气味和其他化学刺激物方面发挥作用。这将为评估利用信息素和植物衍生化合物监测或管理农业景观中 E. vittella 飞蛾的可能性开辟机会。
