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首页> 外文期刊>Biocontrol Science and Technology >Insect herbivores associated with the invasive herb Senecio madagascariensis (Asteraceae) in its native range in KwaZulu-Natal, South Africa and their potential as biological control agents in invaded countries
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Insect herbivores associated with the invasive herb Senecio madagascariensis (Asteraceae) in its native range in KwaZulu-Natal, South Africa and their potential as biological control agents in invaded countries

机译：昆虫草食动物与其在昆拉鲁 - 纳塔尔，南非，南非的本土范围内的侵袭性草本群岛Madagascariensis（Asteraceae）及其作为入侵国家的生物对照剂

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摘要

Native to southern Africa, Senecio madagascariensis Poir. (fireweed, Asteraceae) has invaded agricultural lands and disturbed areas in several countries worldwide and is currently a target for biological control in Australia and the USA (Hawaii). Quantitative surveys of the plant in KwaZulu-Natal, South Africa, considered the origin of the Australian and Hawaiian populations, revealed several insect herbivore taxa that are frequently associated with the plant's foliar, floral and structural tissues. These largely comprised ectophagous sap suckers (34%), chewers (29%) and root feeders (1%), but also endophagous stem borers (21%), capitulum feeders (13%) and leaf miners (2%). Many of these taxa were encountered only occasionally or rarely during sampling, with some displaying low to very low abundance. Based on these surveys and earlier precedents in biocontrol programmes against other invasive Asteraceae, 15 taxa were shortlisted as candidate agents. Of these, four were prioritised for host-range assessments which are currently in progress. These include the capitulum-feeding Homoeosoma stenotea Hampson (Lepidoptera: Pyralidae), the stem-boring Gasteroclisus tricostalis (Thunberg) (Coleoptera: Curculionidae) and Metamesia elegans (Walsingham) (Lepidoptera: Tortricidae) and the root-feeding Longitarsus basutoensis Bechyne (Coleoptera: Chrysomelidae: Alticinae). Although the diversity of native Senecio species in Australia may present challenges during routine host-specificity testing, prospects for the biocontrol of S. madagascariensis in Hawaii appear very promising, since the native flora does not include any species in the tribe Senecioneae.
机译：南部非洲原产，Senecio Madagascariensis Poir。 （Fireweed，Asteraceae）在全球的几个国家入侵了农业土地和受扰动的地区，目前是澳大利亚和美国（夏威夷）的生物控制的目标。南非夸祖鲁 - 纳塔尔的植物的定量调查被认为是澳大利亚和夏威夷人口的起源，揭示了几种昆虫草食虫群，通常与植物的叶，花卉和结构组织有关。这些主要包括异注液吸盘（34％），咀嚼剂（29％）和根饲养者（1％），但也是反冲虫茎螟（21％），Capitulum进料器（13％）和叶片矿工（2％）。在抽样过程中只偶尔或很少遇到这些分类群中的许多群体，一些显示出低的大量。基于这些调查和早期的生物控制计划中的先例对抗其他侵入性的Asteraceae，15个分类群作为候选药剂入围。其中，对于目前正在进行的宿主范围评估进行了四个优先考虑。这些包括Capitulum喂养的同源瘤史胸塞（Lepidoptera：Pyralidae），The Step-Boring Gasteroclisus tricostalis（Thunberg）（鞘翅目：Curculionidae）和Metamesia elegans（Walsinghtera：Tortricidae）和根饲喂的Longitarsus Basutoensis Bechyne（鞘翅目：Chrysomelidae：Alticinae）。虽然澳大利亚的原生调解物种的多样性可能在常规宿主特异性测试期间呈现挑战，但夏威夷的S. Madagastariensis的生物管道前景似乎非常有前景，因为本地植物不包括部落中央翁翁中的任何物种。

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