甘薯粉虱（Bemisia tabaci）是对多种农作物和蔬菜最具破坏性的害虫之一。依赖农药的管理计划导致了严重的健康问题，包括农药中毒和人类癌症，以及害虫的农药抗药性。昆虫病原真菌（EPF）被认为对许多害虫是安全且高效的。因此，鉴定 EPF 对烟粉虱的致病性和毒力对于控制烟粉虱的侵染非常有价值。在这项研究中，我们研究了在最佳和次优条件下，Aschersonia aleyrodis、Isaria fumosorosea、Beauveria bassiana 和 Akanthomyces muscarius (= Lecanicillium muscarium) 的分生孢子悬浮液对黄瓜幼苗烟粉虱若虫期的功效。所有 EPF表现出显着的杀卵作用，在 A. aleyrodis (96.46%) 和 I. fumosorosea 处理的幼苗 (94.60%) 中观察到对寄主卵和爬虫的累积死亡率最高。同样，在 L4 龄实验中，A. aleyrodis 和 I. fumosorosea 的效率最高，累计死亡率分别为 94.82% 和 94.75%。然而，经毒蝇伞（78.36％）和白僵菌（85.90％）处理的幼苗的烟粉虱累积死亡率也与未经处理的幼苗（7.10％）显着不同。在次优相对湿度条件下（≤ 45% RH），粉虱表现出对恶劣条件的更强耐受性，导致 L1-L2 若虫的感染率显着升高（约 92%），而 I 中观察到的幼虫感染率约为 32%。 . fumosorosea 处理的幼苗。所有选定的 EPF 对幼若虫龄更有效。我们的结果还强调了粉虱在次优条件下的功效。本文受版权保护。保留所有权利。本文受版权保护。版权所有。

Sweet potato whitefly (Bemisia tabaci) is one of the most destructive pests to an extensive host range of crops and vegetables. Pesticide-dependent management programs have led to severe health problems, including pesticide poisoning and cancer in human beings, as well as pesticide resistance in insect pests. Entomopathogenic fungi (EPF) are considered safe and highly effective against many pests. Therefore, identifying the pathogenicity and virulence of EPFs against B. tabaci is a valuable addition to the management of their infestations. In this study, we investigated the efficacy of conidia suspensions of Aschersonia aleyrodis, Isaria fumosorosea, Beauveria bassiana, and Akanthomyces muscarius (= Lecanicillium muscarium) against nymphal stages of B. tabaci in cucumber seedlings under both optimal and suboptimal conditions.All of the EPFs demonstrated significant ovicidal effects, with the highest cumulative mortalities observed in A. aleyrodis (96.46%) and I. fumosorosea-treated (94.60%) seedlings against host eggs and crawlers. Similarly, in the L4-instars experiment, A. aleyrodis and I. fumosorosea were the most efficient, resulting in cumulative mortalities of 94.82% and 94.75%, respectively. However, B. tabaci cumulative mortalities on seedlings treated with A. muscarius (78.36%) and B. bassiana (85.90%) were also significantly different from untreated seedlings (7.10%). Under suboptimal relative humidity conditions (≤45% RH), A. aleyrodis exhibited greater tolerance to harsh conditions, causing a significantly higher infection rate in L1-L2 nymphs (~92%) compared to the approximately 32% infected young nymphs observed in I. fumosorosea-treated seedlings.All the selected EPF were more effective against the young nymphal instars. Our results also highlight the efficacy of A. aleyrodis under suboptimal conditions. This article is protected by copyright. All rights reserved.This article is protected by copyright. All rights reserved.