scholarly journals Effects of intraguild interactions on Anticarsia gemmatalis and Chrysodeixis includens larval fitness and behavior in soybean

2021 ◽  
Author(s):  
Sabrina Ongaratto ◽  
Edson LL Baldin ◽  
Thomas E Hunt ◽  
Débora G Montezano ◽  
Emily A Robinson ◽  
...  
Keyword(s):  
Anticarsia Gemmatalis ◽  
Intraguild Interactions ◽  
And Behavior ◽  
Chrysodeixis Includens

Intraguild interactions and behavior of Spodoptera frugiperda and Helicoverpa spp. on maize

2017 ◽  
Vol 73 (11) ◽  
pp. 2244-2251 ◽  
Author(s):  
José PF Bentivenha ◽  
Débora G Montezano ◽  
Thomas E Hunt ◽  
Edson LL Baldin ◽  
Julie A Peterson ◽  
...  
Keyword(s):  
Spodoptera Frugiperda ◽  
Intraguild Interactions ◽  
And Behavior

scholarly journals Characterization of a Chrysodeixis includens nucleopolyhedrovirus Isolate from Brazilian Cerrado and Assessment of its Co-Infection with Anticarsia gemmatalis multiple nucleopolyhedrovirus

2019 ◽  
Vol 62 ◽  
Author(s):  
Márcio Martinello Sanches ◽  
William Sihler ◽  
Cláudia Efigênia Pereira Silva ◽  
Giovana Curcio Guimarães ◽  
Norton Polo Benito ◽  
...  
Keyword(s):  
Anticarsia Gemmatalis ◽  
Brazilian Cerrado ◽  
Multiple Nucleopolyhedrovirus ◽  
Chrysodeixis Includens

scholarly journals Resistance status of lepidopteran soybean pests following large-scale use of MON 87701 × MON 89788 soybean in Brazil

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Renato J. Horikoshi ◽  
Oderlei Bernardi ◽  
Daniela N. Godoy ◽  
Altair A. Semeão ◽  
Alan Willse ◽  
...  
Keyword(s):  
Helicoverpa Armigera ◽  
Large Scale ◽  
Anticarsia Gemmatalis ◽  
Significant Shift ◽  
Glyphosate Tolerance ◽  
Lepidopteran Pests ◽  
Widespread Adoption ◽  
Helicoverpa Armígera ◽  
Commercial Introduction ◽  
Chrysodeixis Includens

AbstractWidespread adoption of MON 87701 × MON 89788 soybean, expressing Cry1Ac Bt protein and glyphosate tolerance, has been observed in Brazil. A proactive program was implemented to phenotypically and genotypically monitor Cry1Ac resistance in Chrysodeixis includens (Walker). Recent cases of unexpected injury in MON 87701 × MON 89788 soybean were investigated and a large-scale sampling of larvae on commercial soybean fields was performed to assess the efficacy of this technology and the distribution of lepidopteran pests in Brazil. No significant shift in C. includens susceptibility to Cry1Ac was observed eight years after commercial introduction of this technology in Brazil. F2 screen results confirmed that the frequency of Cry1Ac resistance alleles remains low and stable in C. includens. Unexpected injury caused by Rachiplusia nu (Guenée) and Crocidosema aporema (Walsingham) in MON 87701 × MON 89788 soybean was detected during the 2020/21 season, and studies confirmed a genetically based alteration in their susceptibility to Cry1Ac. MON 87701 × MON 89788 soybean remains effective against Anticarsia gemmatalis (Hübner), C. includens, Chloridea virescents (Fabricius) and Helicoverpa armigera (Hübner) in Brazil. However, there is evidence of field-evolved resistance to MON 87701 × MON 89788 soybean by the secondary soybean pests R. nu and C. aporema.

scholarly journals Flutuação populacional de Pragas e seus inimigos naturais em Soja no projeto Rio Formoso - Formoso do Araguaia - TO, Brasil

1998 ◽  
Vol 28 (1) ◽  
pp. 67-67 ◽  
Author(s):  
Julcemar DIDONET ◽  
Daniel de B FRAGOSO ◽  
Joenes M PELUZIO ◽  
Gil R dos SANTOS
Keyword(s):  
Anticarsia Gemmatalis ◽  
Piezodorus Guildinii ◽  
Chrysodeixis Includens

Neste estudo, desenvolvido na entressafra do arroz (Julho-Outubro) de 1995, no Projeto Rio Formoso, município de Formoso do Araguaia - TO, com o objetivo de verificar o comportamento da população das pragas e seus inimigos naturais em soja, foram realizados levantamentos semanais com o método do pano de batida, em três cultivares de soja de ciclo médio: EMGOPA 308, DOKO RC e EMBRAPA 31 (BR 81). Entre os percevejos fitófagos somente foi constatada a ocorrência de Piezodorus guildinii, com picos populacionais no período de enchimento de grãos, porém não atingindo o nível de controle. As lagartas desfolhadoras encontradas foram Anticarsia gemmatalis, Hedylepta indicata e Chrysodeixis íncludens, em ordem decrescente de abundância. Dos coleópteros desfolhadores, a espécie encontrada em maior abundância foi Cerotoma sp. com picos populacionais próximos ao período reprodutivo, diferindo significativamente entre as cultivares. Dentre os inimigos naturais, foi verificada a ocorrência, em maior abundância de Cycloneda sanguínea (Coleoptera, Coccinellidae), Geocoris sp. (Heteroptera, Lygaeidae) e Lebia sp. (Coleoptera, Carabidae).

scholarly journals Specific binding of Bacillus thuringiensis Cry1Ea toxin, and Cry1Ac and Cry1Fa competition analyses in Anticarsia gemmatalis and Chrysodeixis includens

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yolanda Bel ◽  
Marc Zack ◽  
Ken Narva ◽  
Baltasar Escriche
Keyword(s):  
Bacillus Thuringiensis ◽  
Brush Border ◽  
Binding Sites ◽  
Brush Border Membrane ◽  
Specific Binding ◽  
Anticarsia Gemmatalis ◽  
Binding Studies ◽  
Velvetbean Caterpillar ◽  
Competition Binding ◽  
Chrysodeixis Includens

AbstractAnticarsia gemmatalis (velvetbean caterpillar) and Chrysodeixis includens (soybean looper) are two important defoliation pests of soybeans. In the present study, we have investigated the susceptibility and brush border membrane-binding properties of both species to Bacillus thuringiensis Cry1Ea toxin. Bioassays performed in first-instar larvae demonstrated potent activity against both soybean pests in terms of mortality or practical mortality. Competition-binding studies carried out with 125Iodine-labelled Cry1Ea, demonstrated the presence of specific binding sites on the midgut brush border membrane vesicles (BBMV) of both insect species. Heterologous competition-binding experiments indicated that Cry1Ea does not share binding sites with Cry1Ac or Cry1Fa in either soybean pest. This study contributes to the knowledge of Cry1Ea toxicity and midgut binding sites in A. gemmatalis and C. includens and sheds light on the cross-resistance potential of Cry1Ea with other Bt proteins aimed at controlling lepidopteran pests in soybeans.

scholarly journals Interação de proteínas Cry1 e Vip3A de Bacillus thuringiensis para controle de lepidópteros-praga

2014 ◽  
Vol 49 (2) ◽  
pp. 79-87 ◽  
Author(s):  
Paula Cristina Brunini Crialesi-Legori ◽  
Camila Chiaradia Davolos ◽  
Ana Rita Nunes Lemes ◽  
Suzana Cristina Marucci ◽  
Manoel Victor Franco Lemos ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Anticarsia Gemmatalis ◽  
Lepidoptera Noctuidae ◽  
Chrysodeixis Includens

O objetivo deste trabalho foi avaliar a suscetibilidade das lagartas Anticarsia gemmatalis (Lepidoptera: Erebidae) e Chrysodeixis includens (Lepidoptera: Noctuidae) às proteínas Cry1 e Vip3A, bem como determinar se há a interação entre essas proteínas no controle das duas espécies. Bioensaios com as proteínas isoladas e em combinações foram realizados, e as concentrações letais CL50 e CL90 foram estimadas para cada condição. As proteínas Cry1Aa, Cry1Ac e Vip3Af foram as mais efetivas no controle de A. gemmatalis, enquanto Cry1Ac, Vip3Aa e Vip3Af foram mais efetivas no de C. includens. As proteínas Cry1Ac e Cry1Ca causaram maior inibição do desenvolvimento das larvas sobreviventes à CL50, em ambas as espécies. Combinações entre Vip3A e Cry1 apresentam efeito sinérgico no controle das espécies e a combinação Vip3Aa+Cry1Ea destaca-se no controle de A. gemmatalis e C. includens. Essas proteínas combinadas são promissoras na construção de plantas piramidadas, para o controle simultâneo das pragas.

Elucidating Efficacy of Ingested Positively Charged Zein Nanoparticles Against Noctuidae

2020 ◽  
Vol 113 (6) ◽  
pp. 2739-2744
Author(s):  
Colin A R Bonser ◽  
Xuan Chen ◽  
Carlos E Astete ◽  
Cristina M Sabliov ◽  
Jeffrey A Davis
Keyword(s):  
Pest Management ◽  
Heliothis Virescens ◽  
Tobacco Budworm ◽  
Anticarsia Gemmatalis ◽  
Velvetbean Caterpillar ◽  
Soybean Looper ◽  
Lepidoptera Noctuidae ◽  
Positively Charged ◽  
Chrysodeixis Includens ◽  
Meridic Diet

Abstract A meridic diet overlay bioassay using empty, positively charged zein nanoparticles ((+)ZNP) was performed on soybean looper (Chrysodeixis includens (Walker)), tobacco budworm (Heliothis virescens (F.)), and velvetbean caterpillar (Anticarsia gemmatalis Hübner) (Lepidoptera: Noctuidae). Assessment of effects on mortality and development weights 7 d after ingestion of (+)ZNP were evaluated on larvae of each species. Treatments involved different concentrations, with H. virescens and A. gemmatalis offered 0 and 3,800 ppm (+)ZNP, whereas C. includens colonies were offered 0, 630, 1,260, and 2,520 ppm (+)ZNP. Mortality of A. gemmatalis and C. includens increased after ingestion of the highest (+)ZNP concentrations, while H. virescens neonate mortality was unaffected. Neonate and third-instar weights of A. gemmatalis and C. includens, and neonate H. virescens, decreased with high (+)ZNP concentrations. Following mortality results from A. gemmatalis neonates, a concentration response test was performed using a range of (+)ZNP concentrations. The LC50 for A. gemmatalis was 1,478 ppm. The potential of (+)ZNP as a pest management tactic is discussed.

scholarly journals Large-scale assessment of lepidopteran soybean pests and efficacy of Cry1Ac soybean in Brazil

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Renato J. Horikoshi ◽  
Patrick M. Dourado ◽  
Geraldo U. Berger ◽  
Davi de S. Fernandes ◽  
Celso Omoto ◽  
...  
Keyword(s):  
Large Scale ◽  
Anticarsia Gemmatalis ◽  
Pest Species ◽  
Large Scale Assessment ◽  
Resistance Evolution ◽  
Lepidopteran Pests ◽  
High Level ◽  
Lepidopteran Pest ◽  
Insecticide Sprays ◽  
Chrysodeixis Includens

AbstractThe soybean technology MON 87701 × MON 89788, expressing Cry1Ac and conferring tolerance to glyphosate, has been widely adopted in Brazil since 2013. However, pest shifts or resistance evolution could reduce the benefits of this technology. To assess Cry1Ac soybean performance and understand the composition of lepidopteran pest species attacking soybeans, we implemented large-scale sampling of larvae on commercial soybean fields during the 2019 and 2020 crop seasons to compare with data collected prior to the introduction of Cry1Ac soybeans. Chrysodeixis includens was the main lepidopteran pest in non-Bt fields. More than 98% of larvae found in Cry1Ac soybean were Spodoptera spp., although the numbers of Spodoptera were similar between Cry1Ac soybean and non-Bt fields. Cry1Ac soybean provided a high level of protection against Anticarsia gemmatalis, C. includens, Chloridea virescens and Helicoverpa spp. Significant reductions in insecticide sprays for lepidopteran control in soybean were observed from 2012 to 2019. Our study showed that C. includens and A. gemmatalis continue to be primary lepidopteran pests of soybean in Brazil and that Cry1Ac soybean continues to effectively manage the target lepidopteran pests. However, there was an increase in the relative abundance of non-target Spodoptera spp. larvae in both non-Bt and Cry1Ac soybeans.

Short-term responses to elevated predator densities: noncompetitive intraguild interactions and behavior

Oecologia ◽  
1994 ◽  
Vol 98 (3-4) ◽  
pp. 269-273 ◽  
Author(s):  
M. D. Moran ◽  
L. E. Hurd
Keyword(s):  
Short Term ◽  
Intraguild Interactions ◽  
And Behavior
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