Inseticidas no controle de Anticarsia gemmatalis (Lepidoptera: Noctuidae) e impacto sobre aranhas predadoras em soja

Martins, Gustavo Luís Mamoré; Toscano, Luciana Cláudia; Tomquelski, Germison Vital; Maruyama, Wilson Itamar

doi:10.5039/agraria.v4i2a2

Cited by 6 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…3B). Pyrethroids such as lambdacyhalothrin usually show high toxicity on predatory phytoseiids (Rock, 1979;Croft, 1990;Raudonis, 2006) and spiders (Wick and Freier, 2000;Martins et al, 2009). These facts are of major concern because Arachnidae are the most abundant arthropods in agro-ecosystems (including our study) and predators of a wide range of insect pests (Marc et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

Impact of lambdacyhalothrin on arthropod natural enemy populations in irrigated rice fields in southern Brazil

Fritz

Heinrichs

Machado

et al. 2013

Int. J. Trop. Insect Sci.

View full text Add to dashboard Cite

Abstract. The present study aimed to determine the selectivity of the pyrethroid lambdacyhalothrin on arthropod natural enemy populations in irrigated rice fields in Rio Grande do Sul, Brazil. The study was conducted at three sites: districts of Cachoeira do Sul, Eldorado do Sul and Capivari do Sul during the crop years of 2007/2008 and 2008/ 2009. Each site consisted of two subareas divided into four plots. One of the subareas received a spray application of 150 ml/ha of lambdacyhalothrin CS 50, while the other subarea was untreated. Arthropods were collected at 2, 15, 30 and 45 days after the application of the insecticide to assess its impact on natural enemy populations. The results indicated consistent differences in natural enemy populations between the treated and untreated areas, especially within the first 2 weeks after the application of the insecticide. Principal components analysis together with x 2 analysis revealed differences in the populations of Tetragnathidae, Anyphaenidae, Araneidae, Coccinellidae, Phytoseiidae and Coenagrionidae between the treated and untreated areas. This study indicated the existence of a great diversity of arthropod natural enemies in irrigated rice fields in a subtropical environment similar to that reported previously from rice fields in tropical environments. In addition, lambdacyhalothrin was shown to be a rapid acting insecticide, with a significant initial decrease in natural enemy populations followed by a rapid recovery beginning at 2 weeks after the application of the insecticide. Especially disconcerting is the severe impact of the insecticide on Phytoseiidae and Araneidae, which are considered key natural enemies for the management of rice pests in southern Brazil.

show abstract

Section: Discussionmentioning

confidence: 99%

Impact of lambdacyhalothrin on arthropod natural enemy populations in irrigated rice fields in southern Brazil

Fritz

Heinrichs

Machado

et al. 2013

Int. J. Trop. Insect Sci.

View full text Add to dashboard Cite

show abstract

“…The main pest, the velvetbean caterpillar, is a defoliator insect that can cause complete destruction of the plant [ 10 , 11 ]. In some moments in the development of culture, as in phase between flowering and pod production, the attacked plants are able to withstand only 30% of defoliation caused by this insect, without incurring losses in seed production [ 12 ] Chewing insects are susceptible to control with Bt insecticides when applied on the surface of the leaves or when genes are inserted into the plant genome, such as in the case of soybean.…”

Section: Introductionmentioning

confidence: 99%

Mode of Action and Specificity of Bacillus thuringiensis Toxins in the Control of Caterpillars and Stink Bugs in Soybean Culture

2014

View full text Add to dashboard Cite

The bacterium Bacillus thuringiensis (Bt) produces delta-endotoxins that possess toxic properties and can be used as biopesticides, as well as a source of genes for the construction of transgenic plants resistant to insects. In Brazil, the introduction of Bt soybean with insecticidal properties to the velvetbean caterpillar, the main insect pest of soybean, has been seen a promising tool in the management of these agroecosystems. However, the increase in stink bug populations in this culture, in various regions of the country, which are not susceptible to the existing genetically modified plants, requires application of chemicals that damage the environment. Little is known about the actual toxicity of Bt to Hemiptera, since these insects present sucking mouthparts, which hamper toxicity assays with artificial diets containing toxins of this bacterium. In recent studies of cytotoxicity with the gut of different hemipterans, susceptibility in the mechanism of action of delta-endotoxins has been demonstrated, which can generate promising subsidies for the control of these insect pests in soybean. This paper aims to review the studies related to the selection, application and mode of action of Bt in the biological control of the major pest of soybean, Anticarsia gemmatalis, and an analysis of advances in research on the use of Bt for control hemipterans.

show abstract

“…O potencial de rendimento da soja é determinado geneticamente e o quanto deste potencial será atingido dependerá do efeito dos fatores limitantes que atuarão em algum momento, durante o ciclo (Costa, 1996). O ataque de insetos desfolhadores como a lagarta-da-soja (Anticarsia gemmatalis Hübner, 1818, Lepidoptera: Noctuidae), uma das principais pragas da cultura (Lourenção et al, 1999;Martins et al, 2009), pode vir a ser um desses fatores.…”

Section: Introductionunclassified

Sistemas de aplicação e inseticidas no controle de Anticarsia gemmatalis na soja

Guedes

Fiorin

Stürmer

et al. 2012

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

Normalmente, a aplicação de inseticidas para o controle de Anticarsia gemmatalis na cultura da soja é realizada com bicos hidráulicos. Dentre outras possibilidades se destacam a assistência de ar junto à barra de pulverização e a aplicação de baixo volume oleoso por atomizadores rotativos de discos. Em um experimento realizado na cultura da soja, na safra 2009/10, avaliou-se a eficiência de controle de A. gemmatalis utilizando-se sistemas de aplicação e inseticidas. O delineamento utilizado foi bifatorial com o fator A constituído por sistemas de aplicação, sendo: A1 - pulverização com atomizadores rotativos de discos; A2 - pulverização com bicos hidráulicos; A3 - pulverização com assistência de ar e o fator D, constituído por inseticidas, sendo: D1 - Cipermetrina e D2 - Lufenurom + profenofós. Não houve interação do inseticida com o sistema de aplicação; além disso, a mistura de inseticidas Lufenurom + Profenofós apresentou efeito residual superior a Cipermetrina. O sistema de aplicação baixo volume oleoso com atomizadores rotativos de discos e o sistema de bicos hidráulicos com assistência de ar junto à barra de pulverização são mais eficientes que a pulverização com bicos hidráulicos no controle de Anticarsia gemmatalis na cultura da soja.

show abstract

Inseticidas no controle de Anticarsia gemmatalis (Lepidoptera: Noctuidae) e impacto sobre aranhas predadoras em soja

Cited by 6 publications

References 5 publications

Impact of lambdacyhalothrin on arthropod natural enemy populations in irrigated rice fields in southern Brazil

Impact of lambdacyhalothrin on arthropod natural enemy populations in irrigated rice fields in southern Brazil

Mode of Action and Specificity of Bacillus thuringiensis Toxins in the Control of Caterpillars and Stink Bugs in Soybean Culture

Sistemas de aplicação e inseticidas no controle de Anticarsia gemmatalis na soja

Contact Info

Product

Resources

About