Eficiência de inseticidas em tratamento de sementes de milho no controle da cigarrinha Dalbulus maidis (Hemiptera: Cicadellidae) em viveiro telado

Oliveira, Charles Martins de; Oliveira, Inocencio; Canuto, Marcus; Cruz, Ivan

doi:10.1590/s0103-84782008000100037

Cited by 15 publications

(16 citation statements)

References 4 publications

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“…Mollicutes interfere with corn plant growth and development, reduce nutrient uptake, and affect photoassimilate translocation for grain filling (Magalhães et al, 2005), stimulating the proliferation of unproductive ears (Oliveira et al, 2008;Teixeira et al, 2013;Orlovskis et al, 2017) and decreasing plant resistance to water stress (Magalhães et al, 2001). This explains the greater difference in grain yield between resistant and susceptible hybrids in the later planting, when stunt disease incidence was the highest.…”

Section: Resultsmentioning

confidence: 99%

Incidence of corn stunt disease in off-season corn hybrids in different sowing seasons

Costa

Campos

Almeida

et al. 2019

Pesq. agropec. bras.

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The objective of this work was to evaluate the incidence of corn stunt disease and its effects on the grain yield of off-season corn (Zea mays) hybrids in different sowing seasons. The experiment was conducted in three sites in the state of Tocantins, in different sowing seasons, in a randomized complete block design, with 30 hybrids (treatments) and three replicates. Corn stunt disease incidence was assessed at 80 days after emergence, varying between hybrids and sowing seasons, with a marked effect of sowing season. The most resistant hybrids were: MG652 PW, Penta VIP, MG600 PW, NS90 PRO2, LG3040 VIP3, MG580 PW, and Defender VIP. The Fórmula VIP2 hybrid was the most susceptible to corn stunt disease. The incidence of the disease increased in the later sowing seasons, causing significant declines in grain yield. The most productive hybrids were: MG580 PW, SYN 5T78 VIP, 2B810 PRO, MG600 PW, Supremo VIP, 2B512 PW, NS92 PRO2, P30S31 VYH, MG652 PW, Penta VIP, SX5371 VIP3, and LG6036 PRO. Corn hybrids vary greatly in their resistance to corn stunt disease, and, the later the sowing season, the higher the disease incidence and the lower the grain yield.

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Section: Resultsmentioning

confidence: 99%

Incidence of corn stunt disease in off-season corn hybrids in different sowing seasons

Costa

Campos

Almeida

et al. 2019

Pesq. agropec. bras.

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“…Destaca-se também que a germinação não apresentou correlação significativa com nenhuma das variáveis. Os resultados novamente comprovam a viabilidade do tratamento de sementes de sorgo com inseticidas, concordando com outros trabalhos de pesquisa na cultura do milho (Portillo et al, 1997;Bittencourt et al, 2000;Ceccon et al, 2004 ns , **, * -Não significativo, significativo em 1,0 e 5,0 % de probabilidade pelo teste F, respectivamente.…”

Section: Resultsunclassified

“…No milho, o tratamento de sementes com imidacloprid e thiametoxam apresentou eficiência no controle de adultos de cigarrinha (Dalbulus maydis, Hemiptera: Cicadellidae) até 30 após a emergência (Oliveira et al, 2008) e até 40 dias com uso do imidacloprid (Martins et al, 2008). Também os inseticidas clotianidina e thiametoxam, objetivando controle de Agrotis ipsilon (Hüfnagel) (Lepidoptera: Noctuidae) e phyllophaga sp.…”

Section: Introductionunclassified

“…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). Nessa cultura outros trabalhos têm comprovado a eficiência do tratamento de sementes com inseticidas no controle de pragas (Portillo et al, 1994;1997).…”

Section: Introductionunclassified

“…O uso de inseticidas para o tratamento de sementes de milho tem se mostrado como técnica promissora, existindo recomendação técnica para o uso desses (Portillo et al, 1994;1997). No entanto, existem poucos estudos sobre os efeitos dos inseticidas utilizados no tratamento de sementes sobre o desenvolvimento inicial de plantas de sorgo.…”

Section: Introductionunclassified

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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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Insecticide seed treatment against corn leafhopper: helping protect grain yield in critical plant growth stages

Neves

Foresti²,

Silva³

et al. 2022

Pest Management Science

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BACKGROUND The corn leafhopper, Dalbulus maidis (Hemiptera: Cicadellidae), spreads maize stunt pathogens and requires timely and effective crop protection. We determined the interaction between maize phenology and the vector feeding/infection period by stunt pathogens with the residual efficacy of neonicotinoid insecticidal seed treatments. Greenhouse‐ and field‐grown maize plants, seed‐treated with clothianidin or imidacloprid insecticides, were infested during seven growth stages with corn leafhoppers reared under controlled conditions on maize plants displaying infection symptoms by both spiroplasma (corn stunt spiroplasma, Spiroplasma kunkelii) and phytoplasma (maize bushy phytoplasma) pathogens. RESULTS In the greenhouse and field settings, seed treatment reduced the stunt disease symptoms and corn yield loss during the VE–V4 maize growth stages and caused no phytotoxicity. The neonicotinoid seed treatment reduced 20–60% of the yield losses from the corn stunt disease until the V4 growth stage. Infestation by infective corn leafhoppers in the V12 maize growth stage caused a 25–30% yield loss irrespective of seed treatment, yet no stunt disease symptom was evident. Nonetheless, corn yield losses and visual stunt symptoms as rated by a nine‐category ordinal scale were strongly correlated (r = 0.79, P < 0.01). CONCLUSION These results reinforce that maize plants are more susceptible to leafhopper stunt disease during the VE–V4 growth stages (emergence to the fourth‐leaf stage). Seed treatment helps reduce the damage in the early growth stages (VE–V2), although supplemental control measures depending on leafhopper population density may be needed from VE–V12 to protect yield losses from the maize stunt condition. © 2021 Society of Chemical Industry.

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Eficiência de inseticidas em tratamento de sementes de milho no controle da cigarrinha Dalbulus maidis (Hemiptera: Cicadellidae) em viveiro telado

Cited by 15 publications

References 4 publications

Incidence of corn stunt disease in off-season corn hybrids in different sowing seasons

Incidence of corn stunt disease in off-season corn hybrids in different sowing seasons

Tratamento de sementes de sorgo com inseticidas

Insecticide seed treatment against corn leafhopper: helping protect grain yield in critical plant growth stages

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