Interação silício-imidacloprid no comportamento biológico e alimentar de Schizaphis Graminum (Rond.) (Hemiptera: Aphididae) em plantas de trigo

Costa, Rosane Rodrigues; Moraes, Jair Campos; Costa, Ronelza Rodrigues da

doi:10.1590/s1413-70542009000200014

Cited by 19 publications

(10 citation statements)

References 12 publications

(9 reference statements)

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“…The absorption of Si has benefits for crops, including an increase in lodging resistance and in photosynthetic activity. Silicon is a chemical element involved in physical functions that regulate evapotranspiration and is able to form a mechanical barrier against fungal and bacterial invasion of the plant, as well as pest insect attack (Costa et al 2009). This protective effect is mainly attributed to the deposition of Si in the form of amorphous silica (SiO 2 •nH 2 O) in the cell wall.…”

Section: Resultsmentioning

confidence: 99%

Potential of calcium silicate to mitigate water deficiency in maize

et al. 2016

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ABSTRACT:The aim of this study was to evaluate the potential of calcium silicate to mitigate the effects of water deficiency in maize plants yield. A completely randomized factorial design, consisting of five combinations of calcium silicate (0, 25, 50, 75, and 100%) and five different soil moisture levels (30, 70, 100, 130, and 160%), was adopted.The following parameters were evaluated: soil matric potential, xylem water potential, silicon concentration, leaf dry weight, and dry mass

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Section: Resultsmentioning

confidence: 99%

Potential of calcium silicate to mitigate water deficiency in maize

et al. 2016

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“…Também ameniza toxidez de Fe, Mn, Al e Na e estimula a produção de fitoalexinas (fenóis) (Korndörfer et al, 1999a). O silício é um elemento químico envolvido em funções físicas de regulagem da evapotranspiração e é capaz de formar uma barreira de resistência mecânica à invasão de fungos e bactérias para o interior da planta, dificultando, também, o ataque de insetos praga (Epstein, 2001;Melo et al, 2003;Costa et al, 2009). O efeito da proteção mecânica é atribuído, principalmente, ao depósito de silício, na forma de sílica amorfa (SiO 2 .nH 2 O), na parede celular.…”

Section: Introductionunclassified

Adubação foliar com silício na cultura do milho

Freitas

Coelho²,

Maia

et al. 2011

Rev. Ceres

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Foliar fertilization with silicon in maizeNumerous studies have shown the beneficial effect of silicon on increased production of several crops, such as sugar cane, rice and potato. However, there is little information about the nutritional benefits of silicon on maize. Thus, the aim of this study was to evaluate the effect of doses and timing of silicon leaf application on the agronomic characteristics and grain yield of maize grown in the agricultural year 2007/2008. The experiment was arranged in a randomized block design in a factorial scheme (4 x 3) + 1, with four replications, involving doses of silicon (130, 260, 390 and 520 g ha -1 ) by foliar application, time of application (2, 5 and 8 expanded leaves) and a control (without silicon application). The studied variables included: plant height, height of first ear, stem diameter, leaf chlorophyll content, leaf silicon content, number of grains per ear, weight of 100 grains and grain yield. Silicon supplemented via foliar application influenced only the variable leaf silicon content.

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“…O uso do imidacloprid em sementes de milho proporcionou menor incidência de Dichelops melacanthus (Hemiptera: Pentatomidae) (Martins et al, 2009). No trigo, o tratamento com imidacloprid proporcionou controle em adultos do pulgão verde e ninfas até 45 dias após a emergência (Costa et al, 2009). No sorgo, os inseticidas carbofuran e thiametoxam não foram eficientes aos 15 dias após a emergência para o controle de S. frugiperda, porém proporcionaram maior percentual de plântulas emergidas (Azevedo et al, 2004).…”

Section: Introductionunclassified

Tratamento de sementes de sorgo com inseticidas

Vanin¹,

Silva²,

Fernandes³

et al. 2011

Rev. bras. sementes

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RESUMO -O tratamento de sementes com inseticidas é um método eficiente que auxilia o manejo integrado de pragas, porém, há escassez de informações de produtos que apresentem seletividade para a cultura do sorgo. O objetivo deste trabalho foi o de avaliar a influência do tratamento de sementes de sorgo com inseticidas, contendo um ou dois princípios ativos, sem e com o armazenamento por 30 dias, na fase inicial de desenvolvimento das plantas. O experimento foi conduzido na Fesurv-Universidade de Rio Verde, em Rio Verde-GO com dez inseticidas (thiodicarb, fipronil, acephate, thiametoxam, imidacloprid, [imidacloprid+thiodicarb], imidacloprid+thiodicarb, imidacloprid+fipronil, thiametoxam+thiodicarb, thiametoxam+fipronil, acrescido da testemunha sem inseticida) sem e com o armazenamento das sementes por 30 dias. Os resultados obtidos permitiram constatar que o armazenamento por 30 dias das sementes de sorgo tratadas com inseticidas diminui o percentual de germinação. A mistura imidaclopridrid+thiodicarb apresenta maior potencial para uso no tratamento de sementes de sorgo. O inseticida acephate causa fitotoxicidade às plântulas de sorgo ao contrário do fipronil, thiametoxam e a mistura thiametoxam+thiodicarb que não prejudicam o vigor das sementes de sorgo.Termos para indexação: Sorghum bicolor, fitotoxicidade, pragas. INSECTICIDE TREATMENT OF SORGHUM SEEDSABSTRACT -Seed treatment with insecticides is an effective tool in integrated pest management, but information on selective products to treat sorghum seeds is limited. The objective of this study was to evaluate the effects of treating sorghum seeds with insecticides containing one or two active ingredients, with and without storage for 30 days, on the early plant development. The experiment was conducted at Fesurv-Universidade de Rio Verde, in Rio Verde-GO, using ten insecticides (thiodicarb, fipronil, acephate, thiamethoxam, imidacloprid, [imidacloprid+thiodicarb], imidacloprid+thiodicarb, imidacloprid+fipronil, thiamethoxam+thiodicarb, thiamethoxam+fipronil, plus a non-insecticide control, with and without 30 day seed storage. The results showed that storage of sorghum seeds treated with insecticides for 30 days reduced the germination percentage. The imidacloprid+thiodicarb mixture has more potential for treating sorghum seeds. The insecticide acephate causes more phytotoxicity to the sorghum seedlings compared to fipronil, thiamethoxam and the thiamethoxam+thiodicarb mixture. The insecticides did not adversely affect sorghum seed vigor.

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Interação silício-imidacloprid no comportamento biológico e alimentar de Schizaphis Graminum (Rond.) (Hemiptera: Aphididae) em plantas de trigo

Cited by 19 publications

References 12 publications

Potential of calcium silicate to mitigate water deficiency in maize

Potential of calcium silicate to mitigate water deficiency in maize

Adubação foliar com silício na cultura do milho

Tratamento de sementes de sorgo com inseticidas

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