Host-specificity testing of the leaf-feeding flea beetle, Phenrica guerini, a biological control agent for the invasive alien cactus, Pereskia aculeata

IF 1.5 4区农林科学 Q4 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Biocontrol Science and Technology Pub Date : 2023-05-17 DOI:10.1080/09583157.2023.2214342

Elizabeth Dixon, I. Paterson, P. Muskett, A. McConnachie

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引用次数: 0

Abstract

ABSTRACT Pereskia aculeata Miller (Cactaceae) is an environmentally damaging invasive alien plant in South Africa and Australia. The flea-beetle, Phenrica guerini Bechyné (Coleoptera: Chrysomelidae), has been used in South Africa as a biological control agent against the plant for more than 30 years but updated host-specificity testing was required to determine its suitability as an agent in Australia. No-choice larval survival tests were conducted on 26 test plant species from 11 families, with survival to the adult stage only being recorded on the target weed, P. aculeata. No-choice oviposition testing with adult P. guerini was conducted on six test plant species. No adult feeding was recorded on any test plants and significantly more eggs were oviposited on P. aculeata (158.8 SE ± 21.4) than on Talinum caffrum (5.2 SE ± 5.2), which was the only test plant on which they oviposited. The adults survived on average 27 days longer on P. aculeata than on any test plant species. In a multiple-choice trial that included all three species that supported any larval feeding as well as P. aculeata, oviposition and feeding was only recorded on target weed. Phenrica guerini is suitably host specific for consideration in Australia as a biological control agent against P. aculeata.

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外来仙人掌入侵生物防治剂取食叶蚤甲虫的寄主特异性研究

摘要/ ABSTRACT摘要:仙人掌科(仙人掌科)是南非和澳大利亚的一种有害环境的外来入侵植物。这种蚤甲虫名为Phenrica guerini bechyn(鞘翅目:金蝇科)，已在南非作为一种生物防治剂使用了30多年，但为了确定其在澳大利亚作为一种防治剂的适用性，需要进行最新的宿主特异性测试。对11科26种被试植物进行了无选择幼虫成虫试验，仅在目标杂草刺草(P. aculeata)上记录了其成虫期的存活情况。对6种受试植物进行了格氏小蠊成虫无选择产卵试验。未见成虫取食，且卵产卵量(158.8 SE±21.4)显著高于产卵量(5.2 SE±5.2)，且产卵量仅在Talinum caffrum上。成虫在刺草上的平均存活时间比在任何试验植物上的平均存活时间长27天。在一项多项选择试验中，包括所有三种支持任何幼虫取食的物种以及棘叶拟虫，产卵和取食只记录在目标杂草上。在澳大利亚，白僵菌具有寄主特异性，可作为刺叶假单胞菌的生物防治剂。

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来源期刊

Biocontrol Science and Technology 生物-昆虫学

CiteScore

3.20

自引率

7.10%

发文量

审稿时长

4-8 weeks

期刊介绍： Biocontrol Science and Technology presents original research and reviews in the fields of biological pest, disease and weed control. The journal covers the following areas: Animal pest control by natural enemies Biocontrol of plant diseases Weed biocontrol ''Classical'' biocontrol Augmentative releases of natural enemies Quality control of beneficial organisms Microbial pesticides Properties of biocontrol agents, modes of actions and methods of application Physiology and behaviour of biocontrol agents and their interaction with hosts Pest and natural enemy dynamics, and simulation modelling Genetic improvement of natural enemies including genetic manipulation Natural enemy production, formulation, distribution and release methods Environmental impact studies Releases of selected and/or genetically manipulated organisms Safety testing The role of biocontrol methods in integrated crop protection Conservation and enhancement of natural enemy populations Effects of pesticides on biocontrol organisms Biocontrol legislation and policy, registration and commercialization.