Infestation of froghopper nymphs changes the amounts of total phenolics in sugarcane

Silva, Rafael José Navas da; Guimarães, Eduardo Rossini; García, José Francisco Fabián; Botelho, P. S. M.; Ferro, Maria Inês Tiraboschi; Mutton, Miguel Ângelo; Mutton, Márcia Justino Rossini

doi:10.1590/s0103-90162005000600005

Cited by 12 publications

(15 citation statements)

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“…In addition, the reduction in sucrose levels may be a consequence of the biosynthesis of plant defense compounds, such as phenols, which requires energy and carbon (Buchanan et al 2000, Taiz & Zeiger 2004, Silva et al 2005. There was a signifi cant correlation between the levels of total phenolic compounds, RS (Reducing Sugars) and TRS (Theoretically Recoverable Sugar) ( Table 1).…”

Section: Resultsmentioning

confidence: 99%

Influence of Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) injury on the quality of cane juice

Madaleno¹,

Ravaneli²,

Presotti³

et al. 2008

Neotrop. entomol.

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Neotropical Entomology 37(1): 068-073 (2008) Infl uência da Injúria de Mahanarva fi mbriolata (Stål) (Hemiptera: Cercopidae) na Qualidade do Caldo de Cana RESUMO -Mahanarva fi mbriolata (Stål) é considerada praga importante na América Latina por reduzir a produtividade de cana-de-açúcar. Há pouca informação sobre o efeito do inseto na qualidade da cana que será utilizada para produção de açúcar e álcool. Assim, objetivou-se avaliar a qualidade do caldo da cana de plantas atacadas pela cigarrinha-das-raízes. Adotou-se o delineamento experimental inteiramente casualizado com 15 repetições e dois tratamentos: testemunha e controle químico com tiametoxam. Nas parcelas experimentais foram encontradas em média 9,2 ± 4,44 ninfas m -1 em monitoramento inicial (dezembro/2003). As ninfas foram contadas aos 18, 35, 55, e 82 dias após a primeira contagem, sendo a infestação expressa em insetos-dia acumulados. Em julho de 2004, procedeu-se à colheita de colmos e extração do caldo, analisando-se o Brix, Pol, açúcares redutores, pH, fi bra, pureza, açúcares redutores totais, dextrana, amido, compostos fenólicos totais e produtividade. O controle químico reduziu a população do inseto e elevou a produtividade de colmos e do pH do caldo. A infestação acumulada foi correlacionada signifi cativa e negativamente com a produtividade, Pol, pH, e pureza. O teor de compostos fenólicos aumentou com a elevação da infestação, enquanto que os valores de dextrana e amido não foram alterados. Infestações de 2,4 e 7,3 ninfas m -1 dia -1 causaram reduções da ordem de 8,3% e 29,8% na produtividade; 1,9 e 5,8% na Pol; 0,4% e 1,1% no pH e 0,4% e 1,2% na pureza, respectivamente, em comparação com áreas de população baixa (< 0,1 ninfa m -1 ).PALAVRAS-CHAVE: Cigarrinha-das-raízes, inseto-dia, controle químico ABSTRACT -Mahanarva fi mbriolata (Stål) is an important pest in Latin America and causes signifi cant reduction in sugarcane productivity. There is no information regarding the effect of this pest on the quality of cane juice used for sugar and alcohol production. This work aimed at evaluating the quality of sugarcane juice from plants attacked by spittlebugs. The experiment was arranged in a completely randomized design with 15 replications, and comprised two treatments: control and chemical treatment with thiamethoxam. An average of 9.2 ± 4.44 spittlebug nymphs m -1 were found in the plots prior to insecticide application. Nymphs were counted 18, 35, 55, and 82 days after the initial sampling (december/2003). During the mid growing season (July 2004), the juice was extracted from stalks and analyzed for Brix, Pol, RS, pH, fi ber, purity, TRS, dextran, starch, and total phenolic compounds. Stalk yield was also measured. Chemical treatment was effi cient in reducing spittlebug population, and elevated both stalk yield and juice pH. The accumulated infestation expressed as insect-days was signifi cantly and negatively correlated to yield, Pol, pH, and purity. The concentration of phenolic compounds increased with pest infestation, while dextra...

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Section: Resultsmentioning

confidence: 99%

Influence of Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) injury on the quality of cane juice

Madaleno¹,

Ravaneli²,

Presotti³

et al. 2008

Neotrop. entomol.

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“…It may also be related to the fact that, in the current analysis, only the percentage of phenolic compounds in the shoot (where adult insects feed) was quantified. Spittlebug nymphs feed on roots and, according to Silva et al , infestation by nymphs of Mahanarva fimbriolata (Stal, 1854) (Hemiptera: Cercopidae) may stimulate the production of phenolic compounds in sugarcane, but this production occurs in the root tissue.…”

Section: Discussionmentioning

confidence: 99%

Do silicon and nitric oxide induce resistance to Mahanarva spectabilis (Hemiptera: Cercopidae) in forage grasses?

Alvarenga

Auad

Moraes

et al. 2019

Pest Management Science

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BACKGROUND Great efforts have been made to identify grasses that are resistant to spittlebugs (Hemiptera: Cercopidae). However, the time required to develop and launch new cultivars is relatively long. The employment of resistance inducers is a current strategy that may be useful for the control of insect pests. This analysis evaluates the feasibility of using the chemical inducers silicon and nitric oxide to increase spittlebug resistance based on changes in forage grass vegetative characteristics and the biological traits of Mahanarva spectabilis (Distant, 1909). RESULTS Mahanarva spectabilis nymphs and adults can cause significant damage to forage grasses. Furthermore, silicon and nitric oxide inducers were not sufficient to lessen this damage by positively influencing the growth and development of forage grasses. These inducers did not negatively alter the biological parameters of M. spectabilis or diminish its population. However, phenolic compound concentrations increased when forage grasses were treated with silicon or attacked by adult insects, but this parameter was not useful to predict spittlebug resistance. This fact suggests that the physiological and biochemical changes caused by silicon should be further studied. CONCLUSION The current analysis demonstrated that application of the chemical inducers silicon and nitric oxide is currently not a viable strategy for the effective and economic management of M. spectabilis on Brachiaria ruziziensis, Pennisetum purpureum and Digitaria sp. © 2019 Society of Chemical Industry

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“…One-bud seed pieces of the cultivars SP80-1816 (spittlebug-susceptible, Silva et al, 2005;Dinardo-Miranda, 2004) and RB72454 ('less infested' by spittlebugs, DinardoMiranda, 2004;Dinardo-Miranda et al, 1999) were planted in 64-cell Styrofoam trays (5 × 10 cm) containing a vermiculite-based substrate.…”

Section: Methodsmentioning

confidence: 99%

“…Because xylem sap is very poor in amino acids and energy, very large amounts are sucked to provide enough nutrients to these fast-growing insects (Fewkes, 1969). Dinardo-Miranda (2004); Silva et al (2005); Garcia et al (2006) agree that most damage is caused by nymphs rather than leaf-sucking adults. Nymphs are responsible for literally drying stalks and making them hollow, as observed in plants under severe water restriction.…”

Section: Introductionmentioning

confidence: 99%

Free proline accumulation in sugarcane under water restriction and spittlebug infestation

Guimarães

Mutton

et al. 2008

Sci. agric. (Piracicaba, Braz.)

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Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) has become a key pest in the sugarcane (Saccharum officinarum) fields of center-south Brazil. Although some control technologies have shown to be efficient, the damage promoted by this spittlebug species and its interaction with sugarcane are poorly characterized. At high infestation levels the symptoms are similar to those of severe water restriction. This work was conducted to determine whether the stress promoted by spittlebug infestation can be measured in terms of free proline accumulation. The water restriction tolerance of two sugarcane genotypes was also compared. Two experiments were set up in a greenhouse and arranged in a completely randomized design in a 2 × 2 × 4 factorial, with two cultivars (SP80-1816 and RB72454), two stress levels (control and ten nymphs per plant or 50% water restriction), and four sampling dates. The water deficit caused by spittlebug nymphs sucking xylem sap does not result in proline accumulation, illustrating that there are different mechanisms to sense when the water deficit is caused by insect feeding or water potential variation in root cells. The cultivar RB72454 accumulates more free-proline, and the dry mass accumulation and stalk growth are less affected in this cultivar under water restriction. The levels of compatible solutes probably cannot be used to measure spittlebug infestation stress in sugarcane and RB72454 is more tolerant to water shortage than SP80-1816. Key words: Mahanarva fimbriolata, Saccharum spp., proline accumulation, water deficit ACÚMULO DE PROLINA EM CANA-DE-AÇÚCAR SOB ESTRESSE HÍDRICO OU SUBMETIDA AO ATAQUE DE CIGARRINHA-DAS-RAÍZESRESUMO: A cigarrinha-das-raízes Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) tornou-se uma praga importante da cultura da cana-de-açúcar na região centro-sul do Brasil. Estratégias de controle têm sido desenvolvidas, mas os danos promovidos por essa praga e sua interação com a cana-de-açúcar ainda são pouco caracterizados. Em altos níveis de infestação da praga, os sintomas nas plantas são muito semelhantes à restrição hídrica severa. Este trabalho foi conduzido com o objetivo de determinar se o estresse promovido pela infestação de ninfas de cigarrinha-das-raízes resulta em acúmulo de prolina livre, além de comparar dois genótipos de cana-de-açúcar quanto à tolerância ao déficit hídrico. Dois experimentos foram conduzidos em delineamento inteiramente casualizado, em esquema fatorial 2 × 2 × 4 com duas cultivares (SP80-1816 e RB72454), dois níveis de estresse (controle e dez ninfas por planta ou 50% de restrição hídrica) e quatro épocas. O déficit hídrico promovido por M. fimbriolata não resultou em acúmulo de prolina, ilustrando a existência de mecanismos distintos para a percepção do estresse hídrico promovido pela praga e pela variação no potencial osmótico nas células das raízes. A cultivar RB72454 acumula maiores teores de prolina livre, e o acúmulo de massa seca e o crescimento dos colmos são menos afetados nessa cultivar sob restrição hídric...

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Infestation of froghopper nymphs changes the amounts of total phenolics in sugarcane

Cited by 12 publications

References 12 publications

Influence of Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) injury on the quality of cane juice

Influence of Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) injury on the quality of cane juice

Do silicon and nitric oxide induce resistance to Mahanarva spectabilis (Hemiptera: Cercopidae) in forage grasses?

Free proline accumulation in sugarcane under water restriction and spittlebug infestation

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