25
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Potencial de isolados de Metarhizium anisopliae e Beauveria bassiana e do óleo de Nim no controle do pulgão Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae) Translated title: Potential of Metarhizium anisopliae and Beauveria bassiana isolates and Neem oil to control the Aphid Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae)

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Avaliou-se a eficiência de Metarhizium anisopliae e Beauveria bassiana para o controle do pulgão Lipaphis erysimi (Kalt.) em couve Brassica oleracea L. var. acephala D.C., bem como sua compatibilidade com óleo de nim (Neemseto®). Dez isolados desses fungos foram utilizados, onde o isolado CG 001 de B. bassiana e o isolado CG 30 de M. anisopliae apresentaram-se como os mais virulentos com 90% e 4,4 dias, e 64% e 3,8 dias, de mortalidade e tempo letal médio, respectivamente. Bioensaios com o produto à base de nim nas concentrações 0,5; 1,0 e 2,0% foram realizados por imersão foliar e pulverização sobre os pulgões. O tratamento com pulverização de 2,0% de Neemseto® proporcionou mortalidade de 90%. O teste in vitro de Neemseto® a 0,125; 0,25 e 0,5%, sobre os isolados CG 001 de B. bassiana e CG 30 de M. anisopliae mostrou que esses isolados podem ter seu crescimento colonial e viabilidade alterados quando expostos a concentrações de nim maiores que 0,25%. Em valores absolutos, os isolados CG 001 de B. bassiana e CG 30 de M. anisopliae foram os mais virulentos para L. erysimi, podendo ser utilizados no manejo dessa praga.

          Translated abstract

          This work aimed to determine the efficiency of the entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana to control the aphid Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae) in kale Brassica oleracea var acephala D.C., as well as their compatibility with a neem oil formulation (Neemseto®). Ten isolates of both fungi were tested and the most pathogenic ones were B. bassiana CG001 and M. anisopliae CG30 with 90% and 4.4 days, and 64% and 3.8 days of mortality and median lethal time, respectively. Bioassays with neem at concentrations of 0.5, 1.0 and 2.0% were done either by leaf discs dipping or spraying the aphids on the leaf discs. The neem spraying treatment at 2.0% provided 90% mortality. The use of B. bassiana isolate CG001 or M. anisopliae isolate CG30 with neem at 0.125, 0.25, and 0.5%, demonstrated that these isolates could have their spore viability or colony growth affected when exposed to neem concentrations higher than 0.25%. In absolute values, the isolates B. bassiana CG001 and M. anisopliae CG30 are the most virulent to L. erysimi, and could be utilized in the management of this pest.

          Related collections

          Most cited references25

          • Record: found
          • Abstract: found
          • Article: found
          Is Open Access

          Azadirachtin from the neem tree Azadirachta indica: its action against insects

          The neem tree has long been recognized for its unique properties both against insects and in improving human health. It is grown in most tropical and sub-tropical areas of the world for shade, reforestation and for the production of row material for natural insecticides and medicines. Azadirachtin, a complex tetranortriterpenoid limonoid from the neem seeds, is the main component responsible for the toxic effects in insects. Six international conferences on neem and a vast scientific literature report both the antifeedant and physiological effects of neem. This article reviews the behavioral and physiological properties of azadirachtin, including effects on insect reproduction, direct and "secondary" antifeedancy, and the physiological effects measured as growth reduction, increased mortality and abnormal and delayed moults. These effects are here categorized in two ways: direct effects on cells and tissues and indirect effects exerted via the endocrine system. It also describes the work carried out to date to identify the mode of action of azadirachtin at the cellular level. The differential effects between animal phyla and over non-target organisms are discussed and point to its potential success as a safe insecticide.
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Pathogenicity of the entomogenous fungiMetarhizium anisopliaeandBeauveria bassianaagainst crucifer pests and the honey bee

              Bookmark
              • Record: found
              • Abstract: found
              • Article: found
              Is Open Access

              Growth disruption, abnormalities and mortality of Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) caused by Azadirachtin

              Azadirachtin is the most effective compound of the neem tree, Azadirachta indica A. Juss, with insecticidal and growth disruption properties on several species of insects. Its effects on the development and survival of Spodoptora littoralis (Boisduval) were studied under laboratory conditions. Third-instar larvae were individually fed on artificial diet treated with azadirachtin (from 0.01 ppm to 1 ppm wt/v), for two days, and transferred to plain diet. Survival, duration of stages and deformities were recorded daily. In a second experiment, the effects of azadirachtin on 3rd instar larvae and on last instar larvae were compared, by feeding the larvae with treated diet (0.3 ppm, 0.6 ppm and a control group), during the same period. A two-day feeding period promoted prolongation of the larval instars, reduction in the Mean Relative Growth Rate (MRGR), moulting disruption, morphological anomalies and mortality of S. littoralis in a dose-dependent manner. When higher concentrations were applied, the effects appeared shortly after treatment and mortality was higher. Many insects died after remaining inactive for several days or during prolonged moulting. At lower concentrations, if moulting was achieved, growth disruption and abnormalities were then likely to occur at the next moulting cycles. When azadirachtin was fed to last-instar larvae, larva-pupa intermediates were formed and the mortality was higher then for 3rd-instar larvae. Azadirachtin showed promissing for the control of the species not only for causing mortality but also for disrupting the development and for causing deformities involved in vital activities like feeding, walking or flying, making the insect vulnerable to several sorts of mortality agents or prevent them from causing damage to the crop.
                Bookmark

                Author and article information

                Journal
                ne
                Neotropical Entomology
                Neotrop. entomol.
                Sociedade Entomológica do Brasil (Londrina, PR, Brazil )
                1519-566X
                1678-8052
                August 2009
                : 38
                : 4
                : 520-525
                Affiliations
                [01] Recife PE orgnameUniv. Federal Rural de Pernambuco orgdiv1Dept.o de Agronomia - Entomologia emar@ 123456depa.ufrpe.br
                Article
                S1519-566X2009000400014 S1519-566X(09)03800414
                10.1590/S1519-566X2009000400014
                19768273
                2778064f-da2c-4ae3-87c9-21ab44dd0381

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 30 March 2009
                : 02 April 2008
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 27, Pages: 6
                Product

                SciELO Brazil


                inseticida botânico,Entomopathogenic fungi,botanic insecticide,compatibility,crucifer,Fungo entomopatogênico,compatibilidade,crucífera

                Comments

                Comment on this article

                scite_

                Similar content1,199

                Cited by2

                Most referenced authors471