Smith Chelsea M, Fadamiro Henry Y, Appel Arthur G
Department of Biological and Environmental Sciences, Troy University, Troy, AL, USA.
Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, USA.
J Insect Sci. 2025 Jan 20;25(1). doi: 10.1093/jisesa/ieaf001.
Aprostocetus hagenowii (Ratzburg) is a generalist parasitoid of cockroach (Blattodea) oothecae. Previous studies examining the host range of A. hagenowii have largely focused on cockroaches of economic and medical importance, which represent a minority of species in an order filled with species of diverse morphology, behavior, and ecology. The aim of this study was to expand the known host range of A. hagenowii with emphasis on nonpest as well as pest species from 3 cockroach families (Blattidae, Corydiidae, and Ectobiidae). Previously recorded host species were also reexamined. Oothecae from 17 cockroach species were exposed to A. hagenowii. Three new host species were recorded: Blatta lateralis (Walker) (Blattidae), Neostylopyga propinqua (Shelford) (Blattidae), and Parcoblatta fulvescens (Saussure and Zehntner) (Ectobiidae). Among the reexamined host species Periplaneta australasiae (Fab.) (Blattidae), Blatta orientalis L. (Blattidae), and Neostylopyga rhombifolia (Stoll) (Blattidae) were successfully parasitized. The cuticle thicknesses of 7 cockroach species' oothecae were also investigated. There were significant differences [Kruskal-Wallis: each zone (below keel, side, and bottom) measured P < 0.001] in cuticle thickness among the species measured. Polyphaga sassurei (Dohrn) (Corydiidae) and Eurycotis floridana (Walker) (Blattidae) had the thickest cuticles (each zone >0.09 mm) and Blattella germanica (L.) (Ectobiidae) had the thinnest (each zone <0.03 mm). However, the mean A. hagenowii ovipositor length (0.92 mm ± 0.01 mm) far exceeded the thickest oothecae measured. Oothecal cuticle thickness alone was not observed to determine the host suitability of each tested cockroach species for A. hagenowii.
哈氏原寄蝇（Aprostocetus hagenowii (Ratzburg)）是蟑螂（蜚蠊目）卵鞘的一种广食性寄生蜂。以往关于哈氏原寄蝇寄主范围的研究主要集中在具有经济和医学重要性的蟑螂上，而在这个形态、行为和生态多样的目里，这些蟑螂只占少数物种。本研究的目的是扩大已知的哈氏原寄蝇寄主范围，重点关注来自3个蟑螂科（蜚蠊科、穴螽科和姬蠊科）的非害虫以及害虫物种。同时也对先前记录的寄主物种进行了重新检查。将17种蟑螂的卵鞘暴露于哈氏原寄蝇。记录到3个新的寄主物种：侧扁蜚蠊（Blatta lateralis (Walker)）（蜚蠊科）、近新大蠊（Neostylopyga propinqua (Shelford)）（蜚蠊科）和黄褐拟蠊（Parcoblatta fulvescens (Saussure and Zehntner)）（姬蠊科）。在重新检查的寄主物种中，澳洲蜚蠊（Periplaneta australasiae (Fab.)）（蜚蠊科）、东方蜚蠊（Blatta orientalis L.）（蜚蠊科）和菱斑新大蠊（Neostylopyga rhombifolia (Stoll)）（蜚蠊科）被成功寄生。还研究了7种蟑螂卵鞘的角质层厚度。在所测量的物种中，角质层厚度存在显著差异[Kruskal-Wallis检验：每个区域（龙骨下方、侧面和底部）测量值P < 0.001]。萨斯卵鞘蠊（Polyphaga sassurei (Dohrn)）（穴螽科）和佛罗里达巨蠊（Eurycotis floridana (Walker)）（蜚蠊科）的角质层最厚（每个区域>0.09毫米），而德国小蠊（Blattella germanica (L.)）（姬蠊科）的角质层最薄（每个区域<0.03毫米）。然而，哈氏原寄蝇产卵器的平均长度（0.92毫米±0.01毫米）远远超过所测量的最厚卵鞘。仅卵鞘角质层厚度并不能决定每种受试蟑螂物种对哈氏原寄蝇的寄主适宜性。
