Infectivity of entomopathogenic nematode, Steinernema glaseri on fall army worm (FAW), Spodoptera frugiperda (Smith, 1797) in Maize (Zea Mays)

Entomopathogenic nematodes (EPNs) are used in biological control of soil insects and show promise in the control of D. speciosa. The objective of this work was to evaluate the potential of native and exotic entomopathogenic nematode isolates in the control of D. speciosa under laboratory and greenhouse conditions. Results showed that all of EPNs caused larval mortality. The most virulent were Heterorhabditis sp. RSC01 (94%), Steinernema glaseri (84%), Heterorhabditis sp. JPM04 (82%) and Heterorhabditis amazonensis RSC05 (78%). There was no effect of the Heterorhabditis sp. RSC01 and S. glaseri isolates on eggs. The maximum mortality of D. speciosa larvae by Heterorhabditis sp. RSC01 was observed at a concentration of 300 IJ/ insect, while by S. glaseri observed the highest mortality at the concentration of 200 IJ/ insect. The Heterorhabditis sp. RSC01 isolate caused over 80% pupal mortality at a concentration of 250 IJ/insect. The virulence of Heterorhabditis sp. RSC01 and S. glaseri was affected by temperature. The Heterorhabditis sp. RSC01 isolate caused reduction in larva survival under greenhouse conditions at all of the tested concentrations and there was no difference in mortality among different concentrations of infectid juveniles.

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Avaliação de danos induzidos em ratos Wistar (Rattus norvergicus) expostos ao extrato aquoso de neem (Azadirachta indica) em mesmas concentrações utilizadas na lavoura de milho (Zea mays) para o controle da lagarta do cartucho (Spodoptera frugiperda)

10.11606/t.74.2019.tde-14022019-155713 ◽

2019 ◽

Author(s):

Celi Aparecida Cardoso

Keyword(s):

Zea Mays ◽

Azadirachta Indica ◽

Spodoptera Frugiperda

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Efeito de diferentes lâminas de irrigação por gotejamento nos danos de Spodoptera frugiperda (Lepidoptera: Noctuidae) em híbridos de milho (Zea mays L.)

Revista Ambientale ◽

10.34032/ambientale.v11i2.98 ◽

2019 ◽

Vol 11 (2) ◽

pp. 42-47

Author(s):

Iracema Raquel Santos BEZERRA ◽

João Pedro Ferreira BARBOSA ◽

Rafael Lima Vieira dos SANTOS ◽

Rafael de Almeida LEITE ◽

Dacio Rocha BRITO ◽

...

Keyword(s):

Zea Mays ◽

Spodoptera Frugiperda ◽

Zea Mays L ◽

Lepidoptera Noctuidae

O milho (Zea mays L.) é uma das culturas de maior importância econômica mundial, entretanto, existem locais com baixos índices pluviométricos que deixam essa cultura sujeita ao déficit hídrico. Para amenizar este problema usa-se irrigação, podendo-se citar a de gotejamento como mais eficiente. No entanto, pragas diminuem a produtividade dessa cultura, principalmente a Spodoptera frugiperda. Assim, à medida que novos híbridos são produzidos, surge a carência de analisar a suscetibilidade deles às pragas. Com isso, objetivou-se neste trabalho, analisar o efeito da aplicação de irrigação por gotejamento em diferentes lâminas nos danos de S. frugiperda em híbridos de milho. A pesquisa foi realizada no Polo Tecnológico Agroalimentar de Arapiraca, com semeadura manual com 5 linhas de 5 m por parcela, sendo essas linhas separadas 0,80 m entre as mesmas e 0,10 m entre plantas. O delineamento experimental foi em blocos casualizados com três repetições dispostas em arranjo fatorial 4x3. Foram avaliadas todas as plantas das parcelas, exceto da bordadura. Os dados foram transformados em √x e submetidos a ANOVA pelo teste F no software SISVAR, havendo significância, realizou-se teste de Tukey e regressão linear. Somente os híbridos diferiram pelo teste F entre os tratamentos, o híbrido Janor foi o que obteve menor média de dano. Conclui-se que houve diferença significativa quantos aos danos de S. frugiperda em híbridos, todavia não foi encontrada diferença entre as lâminas de irrigação por gotejamento nem sua interação com os híbridos.

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Seasonal incidence of fall army worm, Spodoptera frugiperda (Smith) infesting maize crop at Raipur (Chhattisgarh)

International Journal of Chemical Studies ◽

10.22271/chemi.2020.v8.i3al.9613 ◽

2020 ◽

Vol 8 (3) ◽

pp. 2644-2646

Author(s):

Nandita Paul ◽

Sonali Deole

Keyword(s):

Spodoptera Frugiperda ◽

Maize Crop ◽

Seasonal Incidence ◽

Army Worm

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Simulation of Fall Armyworm (Spodoptera frugiperda) Attacks and the Compensative Response of Quality Protein Maize (Zea mays, var. Mudishi-1 and Mudishi-3) in Southwestern DR Congo

OALib ◽

10.4236/oalib.1107217 ◽

2021 ◽

Vol 08 (03) ◽

pp. 1-14

Author(s):

Jean Pierre Kabongo Tshaibukole ◽

Gertrude Pongi Khonde ◽

André Matondo Phongo ◽

Nlandu Ngoma ◽

Amand Mbuya Kankolongo ◽

...

Keyword(s):

Zea Mays ◽

Spodoptera Frugiperda ◽

Fall Armyworm ◽

Quality Protein Maize ◽

Dr Congo

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Entomopathogenic nematode host finding: response to host contact cues by cruise and ambush foragers

Parasitology ◽

10.1017/s0031182000074230 ◽

1992 ◽

Vol 105 (2) ◽

pp. 309-315 ◽

Cited By ~ 127

Author(s):

E.E. Lewis ◽

R. Gaugler ◽

R. Harrison

Keyword(s):

Entomopathogenic Nematode ◽

Nematode Species ◽

Host Finding ◽

Steinernema Carpocapsae ◽

Foraging Strategies ◽

Popillia Japonica ◽

Search Behaviour ◽

Search Area ◽

Steinernema Glaseri ◽

Host Cues

SUMMARYSearch behaviour of two entomopathogenic nematode species with different foraging strategies was compared by measuring parameters of unrewarded search after contact with host cues. Steinernema glaseri cruises in search of hosts. Steinernema carpocapsae ambushes hosts. Nematodes should respond to contact with relevant host cues by shifting their search from ranging to localized after contact with them. We predicted that cruising foragers rely on chemical cues more heavily than ambushers. These species were also tested for host affinities. Nematodes were tracked by image analysis after exposure to faeces, cuticle or food of either Popillia japonica or Spodoptera exiqua. Steinernema glaseri responded to selected host cues by shifting from ranging to localized search, characterized by decreased locomotory rate, distance travelled, search area and the proportion of the test period spent moving. Steinernema carpocapsae did not respond to host cues. Steinernema glaseri responds to selected chemical host cues for host location, whereas S. carpocapsae does not.

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