Associação de Baculovirus aniticarsia com subdosagens de inseticidas no controle de lagartas de Anticarsia gemmatalis (Hübner, 1818)

Silva, Mauro Tadeu Braga da

doi:10.1590/s0103-84781995000300002

Cited by 7 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this respect, Moscardi & Sosa-Gómez (1992) observed that the NPV of the velvetbean caterpillar mixed with several insecticides at concentrations up to 1/6 of the recommended ones resulted in adequate control of pest populations when they occurred beyond the limits established for the use of the virus alone. Similar results were obtained by Silva (1995) for extremely elevated population densities. According to Moscardi (1998), this strategy may be useful for cases in which the pest population exceeds the limit for use of NPV alone, considering that reduced doses of insecticide would involve less of human intoxication risk, reduction of populations of natural enemies and environmental damage.…”

Section: Major Species Of Entomopathogenic Fungi and Bacteria Used Insupporting

confidence: 88%

Effect of Thiamethoxam on Entomopathogenic Microorganisms

Filho¹,

Almeida²,

Lamas³

2001

Neotrop. Entomol.

View full text Add to dashboard Cite

Efeito do Tiametoxam Sobre Microrganismos EntomopatogênicosRESUMO -A compatibilidade de microrganismos entomopatogênicos com tiametoxam e outros inseticidas foi estudada através de ensaios in vitro e em campo. Os microrganismos testados foram: Aschersonia aleyrodis, Bacillus thuringiensis, Baculovirus anticarsia (VPNAg), Beauveria bassiana, Hirsutella thompsonii, Metarhizium anisopliae, Nomuraea rileyi, Paecilomyces farinosus, Sporothrix insectorum e Verticillium lecanii. Em laboratório, foram testadas duas concentrações de cada produto, o que envolveu as recomendações máxima e mínima para uso em condições de aplicação no campo. Os produtos foram adicionados em meio de cultura específico para crescimento dos entomopatógenos. Foram avaliados os crescimentos reprodutivo e vegetativo para fungos e unidades formadoras de colô-nias (UFC) para bactérias. Para os testes conduzidos em campo foram consideradas as UFC para fungos e bactéria e a mortalidade de lagartas para o NPV de Anticarsia gemmatalis (Hueb.). Os resultados mostraram que: (1) a ação dos produtos fitossanitários sobre o crescimento vegetativo e a esporulação dos microrganismos variou em função da natureza química dos produtos, da concentração e da espécie do agente microbiano; (2) ABSTRACT -The compatibility of entomopathogenic microorganisms with thiamethoxam and other insecticides was studied in vitro and under field conditions. The microorganisms tested were: Aschersonia aleyrodis, Bacillus thuringiensis, Baculovirus anticarsia (NPVAg), Beauveria bassiana, Hirsutella thompsonii, Metarhizium anisopliae, Nomuraea rileyi, Paecilomyces farinosus, Sporothrix insectorum and Verticillium lecanii. Two concentrations of each product were tested in the laboratory, based on the maximum and minimum recommended rates for application in the field. The products were added to specific culture medium for growth of the entomopathogens. Reproductive and vegetative growth were evaluated for fungi, and colony forming units (CFU) were evaluated for bacteria. For the field test, CFUs were considered for both fungi and bacteria and caterpillar mortality for the NPV of Anticarsia gemmatalis (Hueb.). Results showed that: (1) the action of the pesticides on the vegetative growth and sporulation of the microorganisms varied as a function of the chemical nature of the products, its concentration and the microbial species; (2) thiamethoxam was compatible with all microorganisms studied; (3) endosulfan, monocrotophos and deltamethrin were the insecticides that most affected B. thuringiensis, B. bassiana, M. anisopliae and S. insectorum; (4) thiamethoxam did not affect the inoculum potential of B. thuringiensis, B. bassiana or M. anisopliae when applied to bean crop (Phaseolus vulgaris); and (5) thiamethoxam did not affect the efficiency of the nuclear polyhedral virus of A. gemmatalis.

show abstract

Section: Major Species Of Entomopathogenic Fungi and Bacteria Used Insupporting

confidence: 88%

Effect of Thiamethoxam on Entomopathogenic Microorganisms

Filho¹,

Almeida²,

Lamas³

2001

Neotrop. Entomol.

View full text Add to dashboard Cite

show abstract

“…After the ingestion, the bodies of polyhedral inclusion, finding alkaline conditions in the mesenterum are dissolved, liberating the virions. The virus begins multiplying itself in the nucleus cells of the insect, dispersing itself for the whole insect body, provoking death, usually from 6 to 8 days after the ingestion (12,24).…”

Section: Introductionmentioning

confidence: 99%

Histopathology of Anticarsia gemmatalis Hübner (Lepidoptera; Noctuidae) treated with Nucleopolyhedrovirus and Bacillus thuringiensis serovar kurstaki

Knaak¹,

Fiúza²

2005

Braz. J. Microbiol.

View full text Add to dashboard Cite

The Anticarsia gemmatalis is responsible for the use of chemical insecticides in the soybean culture, causing a significant increase in the costs of farming and a great unbalance in the ecosystem. The use of microbial agents, like Bacillus thuringiensis serovar kurstaki (Btk) and Anticarsia gemmatalis nucleopolyhedrovirus (AgNPV), they are an alternative to chemical control of the pest insects. In the interaction analysis of the entomopathogenic bacteria and virus it is considered important the in vitro action mode of these microbiology control agents. Therefore, the present study aims the histopathological analysis of the A. gemmatalis larvae digestive system after the interaction in vivo of the entomopathogenic Btk and AgNPV, represented the Dipel and Baculovirus anticarsia formulations, respectively. The evaluations were realized in larvae of 2nd instar, in which the mortality was evaluated daily, and a histopathology was done with collected larvae in time of 1, 3, 6, 12 and 24 hours after the treatments application. The results of the in vivo assays reveal that the treatment using the association of AgNPV-Btk (98.68% of mortality) was more efficient than using AgNPV isolatedly (81.28% of mortality), but the Btk when used isolatedly had a mortality of 100%. The treatments showed significant (P<0.05) differences between AgNPV and Btk, AgNPV and AgNPV/Btk. The histopathological analysis of the AgNPV and Btk in A. gemmatalis larvae suggests that the Dipel and Baculovirus anticarsia products were more efficient when they were used simultaneously, because the action of AgNPV was intensified when used in association with Btk, causing changes in the larvae midgut after 6 hours of treatments. When the entomopathogens were used isolating the gut cells alterations were observed only 12 hours after the treatments.

show abstract

“…Em plantas de soja, sob condições experimentais, as perdas, causadas pela praga, oscilaram entre 3 e Ciência Rural, v. 33, n. 4, jul-ago, 2003. 75%, no período de oito safras agrícolas, nas parcelas não tratadas, considerando os métodos de controle biológico e químico e a associação de ambos (SILVA, 1992;1993;1995).…”

Section: Introductionunclassified

Controle de Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) com reguladores de crescimento de insetos

2003

Self Cite

View full text Add to dashboard Cite

Control of Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) larvae with insect growth regulators RESUMO A lagarta-da-soja, Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae), é uma praga importante na cultura da soja no Brasil. Este estudo teve como objetivo avaliar diferentes inseticidas, reguladores de crescimento, para o controle dessa praga. Os inseticidas diflubenzuron (15g i.a. ha -1 ), lufenuron (7,5g i.a. ha -1 ), metoxifenozide (21,6g i.a. ha -1 ) e teflubenzuron (7,5g i.a. ha -1 ) foram aplicados com pulverizador costal de precisão, equipado com pontas tipo leque 110, 02, numa pressão de 1 bar e volume de calda de 100l ha -1 . No dia da aplicação dos inseticidas, as plantas de soja (cv. Fundacep 33) estavam com 0,90m de altura, no estádio R3.1, e infestação média de 95 lagartas pequenas e de 33 lagartas grandes por dois metros de fileira. A eficiência dos inseticidas foi determinada através da contagem do número de lagartas vivas pequenas e grandes aos 0, 2, 4, 7 e 10 dias após a aplicação (DAA); da percentagem de desfolha aos 15 DAA e da produção de grãos. Foi observado efeito de choque do inseticida metoxifenozide tanto em lagartas pequenas quanto em grandes. Os inseticidas diflubenzuron, lufenuron e teflubenzuron controlaram eficientemente as lagartas a partir de 4 DAA. As infestações de lagartas nas parcelas testemunhas aumentaram a desfolha em 75,8% e reduziram produtividade para 2371 kg ha -1 . Nas parcelas tratadas com inseticidas desfolha variou de 34,7% a 50,7% e a produtividade entre 3255kg ha -1 e 3585kg ha -1 .Palavras-chave: insecta, Glycine max L., inseticida, controle químico. ABSTRACTThe velvetbean caterpillar, Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae), is an important soybean pest in Brazil. This study aimed to evaluate growth regulators insecticides. A precision sprayer equipped with 110 02 nozzles, working at a constant pressure of 1 bar and volume of 100 liters per hectare was used to apply the insecticide treatments (diflubenzuron at 15g a.i. per hectare, lufenuron at 7.5 g a.i. per hectare, metoxyfenozide at 21.6g a.i. per hectare and teflubenzuron at 7.5g a.i. per hectare). Applications when plants were 0.90m height, in the R3.1 growth stage, and the number of small larvae was 95, while that of large larvae was 33 per two meters of row. The number of live larvae at 0, 2, 4, 7 and 10 days after application, the defoliation at 15 days after application and grain yield were evaluated. The fastest control of large and small larvae was obtained with metoxyfenozide at 2 days after application. The insecticides diflubenzuron, lufenuron and teflubenzuron efficiently controlled of large and small larvae, but only at 4 days after application. Larval infestations in non-treated plots resulted in significant defoliation and yield losses when compared to plots treated with insecticides.

show abstract

Associação de Baculovirus aniticarsia com subdosagens de inseticidas no controle de lagartas de Anticarsia gemmatalis (Hübner, 1818)

Cited by 7 publications

References 7 publications

Effect of Thiamethoxam on Entomopathogenic Microorganisms

Effect of Thiamethoxam on Entomopathogenic Microorganisms

Histopathology of Anticarsia gemmatalis Hübner (Lepidoptera; Noctuidae) treated with Nucleopolyhedrovirus and Bacillus thuringiensis serovar kurstaki

Controle de Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) com reguladores de crescimento de insetos

Contact Info

Product

Resources

About