Is there any relationship between the effectiveness of some Heterorhabditis bacteriophora isolates on the host and their average penetration rate?

IF 2.7 2区 农林科学 Q1 ENTOMOLOGY
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Abstract

Entomopathogenic nematodes, such as Heterorhabditis bacteriophora, have been widely recognized for their potential in biological control strategies to manage agricultural pests effectively. This study aimed to evaluate the penetration rate and efficacy of different H. bacteriophora isolates, including two isolates (HB4 and HBNL) and a hybrid strain (HBH), against Tenebrio molitor L. (Col: Tenebrionidae) adults. The research also aimed to determine whether there was a correlation between the mortality caused by these isolates and their penetration. These isolates were applied to T. molitor adults at different concentrations 0.78 IJs (infective juveniles)/cm2 (50 IJs/Petri dishes), 1.57 IJs/cm2 (100 IJs/Petri dishes), 2.36 IJs/cm2 (150 IJs/Petri dishes), 3.14 IJs/cm2 (200 IJs/Petri dishes), 3.93 IJs/cm2 (250 IJs/Petri dishes), 7.86 IJs/cm2 (500 IJs/Petri dishes), 11.8 IJs/cm2 (750 IJs/Petri dishes), 15.72 IJs/cm2 (1000 IJs/Petri dishes), 19.66 IJs/cm2 (1250 IJs/Petri dishes). Another objective of the study was to observe the penetration rate means of these nematodes at consistent concentrations and record the resulting mortality rates. The findings revealed that the highest mortality rate of 100% was achieved at concentrations of 250, 500, 750, 1000, and 1250 IJs/Petri dishes. The HBH hybrid strain also exhibited the highest penetration rate mean of 20.33 IJs at a concentration of 1250 IJs/Petri dishes. These results highlight the efficacy of H. bacteriophora isolates and the hybrid strain in controlling T. molitor adults, with significant mortality rates observed at higher nematode concentrations. The study's emphasis on penetration rate means and the relationship between nematode concentration and pest mortality underscores the importance of optimizing entomopathogenic nematode applications for effective pest management.

一些细菌异型线虫分离物对宿主的效力与其平均渗透率之间是否存在任何关系?
昆虫病原线虫,如细菌异型线虫,因其在生物防治策略中有效管理农业害虫的潜力而得到广泛认可。本研究旨在评估不同的细菌线虫分离株(包括两个分离株(HB4 和 HBNL)以及一个杂交株(HBH))对 Tenebrio molitor L. (Col: Tenebrionidae)成虫的穿透率和效力。研究还旨在确定这些分离物造成的死亡率与其穿透力之间是否存在相关性。对 T. molitor 成虫施用这些分离物的浓度分别为 0.78 IJs(感染幼虫)/cm2(50 IJs/Petri皿)、1.57 IJs/cm2(100 IJs/Petri皿)、2.36 IJs/cm2(150 IJs/Petri皿)、3.14 IJs/cm2(200 IJs/Petri皿)、3.93 IJs/cm2(250 IJs/Petri皿)、7.86 IJs/cm2(500 IJs/Petri皿)、11.8 IJs/cm2(750 IJs/Petri皿)、15.72 IJs/cm2(1000 IJs/Petri皿)、19.66 IJs/cm2(1250 IJs/Petri皿)。研究的另一个目的是观察这些线虫在一致浓度下的穿透率,并记录由此产生的死亡率。研究结果表明,浓度为 250、500、750、1000 和 1250 IJs/Petri 培养皿时,死亡率最高,达到 100%。在浓度为 1250 IJs/Petri 培养皿时,HBH 杂交菌株的平均穿透率也最高,达到 20.33 IJs。这些结果凸显了细菌分离株和杂交菌株在控制褐飞虱成虫方面的功效,在线虫浓度较高时,死亡率显著提高。该研究强调了穿透率手段以及线虫浓度与害虫死亡率之间的关系,突出了优化昆虫病原线虫应用对有效防治害虫的重要性。
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来源期刊
CiteScore
5.70
自引率
18.50%
发文量
112
审稿时长
45 days
期刊介绍: The Journal of Stored Products Research provides an international medium for the publication of both reviews and original results from laboratory and field studies on the preservation and safety of stored products, notably food stocks, covering storage-related problems from the producer through the supply chain to the consumer. Stored products are characterised by having relatively low moisture content and include raw and semi-processed foods, animal feedstuffs, and a range of other durable items, including materials such as clothing or museum artefacts.
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