Life History of &lt;I&gt;Megamelus scutellaris&lt;/I&gt; with Description of Immature Stages (Hemiptera: Delphacidae)

Sosa, Alejandro; Lenicov, Ana María Marino de Remes; Mariani, Roxana; Cordo, H. A.

doi:10.1603/0013-8746(2005)098[0066:lhomsw]2.0.co;2

Cited by 27 publications

(21 citation statements)

References 5 publications

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“…priority for M. scutellaris have recently been better understood and (Sosa et al, 2004(Sosa et al, , 2005 M. scutellaris reduction (Tipping et al, 2010). Hence, that bioagent would be better categorized as belonging to the second priority group.…”

Section: Use Of Insects Asmentioning

confidence: 99%

“…Currently, biological control of water hyacinth in different parts of the world relies on two weevil species (N. eichhorniae and N. bruchi), the pyralid moth (N. albiguttalis), the mite O. terebrantis, and the mired E. catarinensis (Julien and hyacinth growth and densities, plant stature, and possibly, seed production (Center and Durden, 1986;Center, 1994;Center et al, 1990Center et al, , 1999aCoetzee et al, 2005). Recent research has targeted C. aquaticum (Bownes et al, 2010a, b), M. scutellaris (Sosa et al, 2005(Sosa et al, , 2007aTipping et al, 2010), and other potential candidate arthropods. Therefore, details of these bioagents are reviewed below.…”

Section: Use Of Insects Asmentioning

confidence: 99%

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Management of water hyacinth (Eichhornia crassipes [Mart.] Solms) using bioagents in the Rift Valley of Ethiopia

Gebregiorgis

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Management of water hyacinth (Eichhornia crassipes[This thesis presents a study on management of water hyacinth (Eichhornia crassipes [Mart.] Solms) using insects and fungal pathogens as bioagents. The main goal was to develop an effective biocontrol strategy for water hyacinth in the Rift Valley of Ethiopia. To this end, a field survey was conducted to assess the agro-ecological distribution of water hyacinth and of native fungal pathogens found in association with water hyacinth. We also performed laboratory and lath house experiments on (i) pathogenicity and host specificity of the fungal pathogens; (ii) adaptability, life table, efficacy and host specificity of the two Neochetina weevils; and (iii) the synergetic effects of integrated use of Neochetina weevils and fungal pathogen as bioagents. Survey results indicated that the weed is distributed in the Rift Valley water bodies located in low, mid and high altitude. The survey results also identified 25 fungal species found in association with water hyacinth that belonged to nine genera. Among the isolates, Alternaria alternata, A. tenuissima, and Alternaria spp. hold promise as possible bioagents of water hyacinth.Laboratory study on life cycle and development of Neochetina weevils indicated the two weevils took shorter generation time in Ethiopia than in Argentina but relatively similar to Kenya and Uganda. In Ethiopia, the two weevils produced four generations per year indicating their successful establishment. Feeding by adult weevils and tunneling by larvae significantly impacted the vigour and reproduction of water hyacinth plants. A herbivory loads of three pairs of N. bruchi and two pairs of N. eichhorniae showed the highest level of leaf damage and defoliated petioles. The study also reinforced that the two weevils are sufficiently host-specific. Finally, a study on integrated use of Neochetina weevils and an indigenous plant pathogen revealed that the two Neochetina weevils and the fungus A. alternata were together able to reduce the vegetative growth and fresh weight of water hyacinth plants considerably.This study recommends integrated use of fungal species and the two weevils to control water hyacinth. Implications of the findings are also discussed in the context of integrated water hyacinth management using the native fungal pathogens and the two weevils.

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Section: Use Of Insects Asmentioning

confidence: 99%

Section: Use Of Insects Asmentioning

confidence: 99%

Management of water hyacinth (Eichhornia crassipes [Mart.] Solms) using bioagents in the Rift Valley of Ethiopia

Gebregiorgis

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“…Eggs are ellipsoidal with a sharp cephalic apex and a rounded caudal end. They are milky white when laid and yellowish white with reddish eye spots before hatching (Sosa et al 2005). Nymphs emerge after 7Á15 d (Sosa et al 2005; Tipping unpublished data) depending upon the temperature.…”

Section: Introductionmentioning

confidence: 99%

“…They are milky white when laid and yellowish white with reddish eye spots before hatching (Sosa et al 2005). Nymphs emerge after 7Á15 d (Sosa et al 2005; Tipping unpublished data) depending upon the temperature. The emerging nymph sloughs off an embryonic membrane and begins feeding at the base of the plant near the water surface.…”

Section: Introductionmentioning

confidence: 99%

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Host specificity assessment and potential impact ofMegamelus scutellaris(Hemiptera: Delphacidae) on waterhyacinthEichhornia crassipes(Pontederiales: Pontederiaceae)

Tipping

Center

Sosa³

et al. 2011

Biocontrol Science and Technology

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The delphacid Megamelus scutellaris Berg was evaluated for host specificity and potential impact as part of a biological control program targeting Eichhornia. crassipes. Survival and development of adults and nymphs were used as metrics with no-choice, two-choice, nymph transfer, and sustainability tests conducted under quarantine conditions. A total of 69 plant species were tested including 12 from the Pontederiaceae (including E. crassipes). Additionally, 27 native and 5 exotic associated wetland species and 11 economic species were tested. Megamelus scutellaris exhibited a high level of oviposition and developmental fidelity to E. crassipes by failing to sustain populations on any non-target test plant past the F 1 generation. Nymph transfer tests which simulated potential spill-over events found that survival was virtually non-existent on associated wetland plants, regardless of taxonomic relatedness, including on Pontederia cordata, an important and widespread native species. Eichhornia crassipes plants exposed to two consecutive generations of feeding produced 66.9% less biomass and 73.4% fewer leaves than those in the controls. We conclude that Megamelus scutellaris is safe to release on E. crassipes in the United States.

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Mass-production of arthropods for biological control of weeds: a global perspective

Moran

Clerck-Floate

Hill

et al. 2023

Mass Production of Beneficial Organisms

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Life History of <I>Megamelus scutellaris</I> with Description of Immature Stages (Hemiptera: Delphacidae)

Cited by 27 publications

References 5 publications

Management of water hyacinth (Eichhornia crassipes [Mart.] Solms) using bioagents in the Rift Valley of Ethiopia

Management of water hyacinth (Eichhornia crassipes [Mart.] Solms) using bioagents in the Rift Valley of Ethiopia

Host specificity assessment and potential impact ofMegamelus scutellaris(Hemiptera: Delphacidae) on waterhyacinthEichhornia crassipes(Pontederiales: Pontederiaceae)

Mass-production of arthropods for biological control of weeds: a global perspective

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