Establishment and impact of insect agents deployed for the biological control of invasive Asteraceae: prospects for the control of Senecio madagascariensis

Egli, Daniella; Olckers, T.

doi:10.1007/s10526-017-9811-2

Cited by 12 publications

(3 citation statements)

References 16 publications

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“…It is poisonous to livestock (particularly cattle and horses) due to the production of pyrrolizidine alkaloids that can cause liver toxicity (Gardner et al 2006). This invasive plant has spread to several countries, including Australia, Argentina, Brazil, Colombia, Japan, Kenya, Uruguay, the United States, and Venezuela (Egli and Olckers 2017).…”

Section: Introductionmentioning

confidence: 99%

Unraveling the influence of environmental factors on fireweed (Senecio madagascariensis) germination and its management implications

Hooda,

Chauhan

2024

Invasive plant sci. manag.

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Fireweed (Senecio madagascariensis Poir.) has invaded and colonized numerous habitats in the coastal areas of southeastern Australia and is a major weed in cultivated lands as well as in poorly grassed, neglected, and highly grazed pastures. To examine the seed germination ecology of two populations (Felton and Gatton) of S. madagascariensis, experiments were conducted in the laboratory and screenhouse. The germination of both populations increased as the alternating temperatures increased from the coolest temperatures (15/5 C) to warmer temperatures (25/15 C). However, the highest temperature regime (35/25 C) resulted in the lowest germination rates. The Gatton population exhibited greater tolerance to higher temperatures, resulting in significantly higher germination (2.4 times) than the Felton population at the highest alternating temperature of 35/25 C. Compared to the Felton population, the Gatton population demonstrated higher tolerance to salt and water stress. In comparison to alternating light and dark periods (12 h each) (97-98%), the germination of both populations of S. madagascariensis was significantly reduced under complete darkness (24 h) (33-39%). A screenhouse seed burial depth experiment revealed similar emergence of S. madagascariensis seedlings between the populations. The maximum emergence (60%) was observed for seeds placed at the soil surface, followed by a dramatic decline in seedling emergence with an increase in depth. No seedlings emerged from a burial depth of 4 cm. With the addition of wheat crop residue to the soil surface at rates comparable to 4 to 8 Mg ha-1, seedling emergence of S. madagascariensis decreased significantly. Information acquired from this study could be utilized to manage and develop effective weed management strategies for controlling S. madagascariensis in different agroecological conditions.

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Section: Introductionmentioning

confidence: 99%

Unraveling the influence of environmental factors on fireweed (Senecio madagascariensis) germination and its management implications

Hooda,

Chauhan

2024

Invasive plant sci. manag.

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“…Senecio madagascariensis Poir. (fireweed), a native herbaceous plant from southern Africa [ 1 ] has been introduced to several countries including Australia, the United States of America (USA; Hawaii), Japan, Brazil, Argentina, Venezuela, Columbia, Uruguay, and Kenya [ 2 ]. Senecio madagascariensis plants contain pyrrolizidine alkaloids (PAs) and when eaten by some domestic livestock (particularly cattle and horses) it can lead to liver toxicity [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Review of the Biology, Distribution, and Management of the Invasive Fireweed (Senecio madagascariensis Poir)

Wijayabandara

Campbell

Vitelli

et al. 2021

Plants

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Whilst exotic invasive species are a major threat to natural and modified ecosystems around the world, management programs to reduce their impacts often fail due to a lack of information about their biology and how best to control them in various situations. This paper reviews the currently available information on the biology, distribution, and management options for the invasive weed Senecio madagascariensis Poir. (fireweed). In addition, we developed a model to predict the climatic suitability of this weed around the world based on the current climate. Senecio madagascariensis originates from southern Africa but it has been introduced to several other countries including Australia. Climatic suitability suggests that there are large areas around the world suitable for the weed’s growth where it is currently not present. The weed poses a major threat to livestock industries in these countries through its ability to reduce pasture production and poison animals. A range of control techniques have been used to try and manage S. madagascariensis. This paper highlights how a better understanding of the biology of S. madagascariensis can help determine the most effective treatments to impose and to further develop integrated management strategies. Besides using traditional approaches, the use of competitive pastures and more tolerant livestock (such as sheep and goats) are some of the other options recommended as part of an integrated approach. On-going research to identify host-specific biological control agents is also considered a priority.

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“…About 21 species of Tephritidae have been manipulated to control Asteraceae species. The most significant biological control programs for such plants with florivorous flies are underway in Australia, Canada, USA, New Zealand and South Africa [3], and West Africa, where the stem-gall tephritid Cecidocares connexa (Macquart 1848) have been upplied on the biological supperession, against the invasive Asteraceae Chromolaena odorata (L.) R. M. King & H. Rob. [4] Chaco is an international biome, distributed by four South American countries: Argentina, Paraguay, Bolivia and Brazil.…”

Section: Introductionmentioning

confidence: 99%

Diversity of Tephritidae and Agromyzidae (Diptera: Brachycera) in Flower Heads of Asteraceae in the Chaco

Uchôa-Fernandes¹,

Fernandes²,

Nakajima³

2021

The Wonders of Diptera - Characteristics, Diversity, and Significance for the World's Ecosystems

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The Chaco is an international biome, connecting four countries: Paraguay (230,000 km2), Bolivia (90,000 km2), Argentina (520,000 km2), and Brazil (Mato Grosso do Sul state (MS), with around 9,000 km2 and in the middle of South America. Brazilian Chaco is restricted to Porto Murtinho region, MS. The daisies (Asteraceae) with near 24,000 species worldwide is characterized by herbs and shrubs that coevolved with several taxa of endophagous insects: dipterans Agromyzidae, Ceciidomyidae and Tephritidae; Coleoptera (Apionidae), Hemiptera (Miridae), Lepidoptera (Blastobasidae, Gelechiidae, Pterophoridae, Pyralidae, and Tortricidae) and the parasitoids of this endophagous insects, which found in the daisies’s flower heads ideal conditions for food, breeding site and shelter. The Neotropical florivorous flies are the Agromyzinae (Agromyzidae), and Tephritinae (Tephritidae), which in their larval stage feed on Asteraceae inflorescences. To report the species of florivore flies, their host plants and parasitoids in flower heads of Asteraceae from the Brazilian Chaco, we sampled inflorescences of 25 species (± 500 flower heads/species) that were kept in containers to the emergence of the florivorous flies or their parasitoids sampled in the three phytophysiognomies. The adult insects after 48 hours of their emergence were fixed in 80% ethanol for later identification. A total 25 species of Asteraceae were evaluated in the Brazilian Chaco, being collected 17,000 flower heads. Nine tribes of two Asteraceae subfamilies were sampled, from which 15 species of florivorous flies were recovered. We found 5 genera with 9 of Tephritinae (Tephritidae), 6 species of Melanagromyza (Agromyzinae, Agromyzidae), and 104 parasitoids (Hymenoptera) of the florivorous flies.

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Establishment and impact of insect agents deployed for the biological control of invasive Asteraceae: prospects for the control of Senecio madagascariensis

Cited by 12 publications

References 16 publications

Unraveling the influence of environmental factors on fireweed (Senecio madagascariensis) germination and its management implications

Unraveling the influence of environmental factors on fireweed (Senecio madagascariensis) germination and its management implications

Review of the Biology, Distribution, and Management of the Invasive Fireweed (Senecio madagascariensis Poir)

Diversity of Tephritidae and Agromyzidae (Diptera: Brachycera) in Flower Heads of Asteraceae in the Chaco

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