Effect of silicon and acibenzolar-s-methyl on colored cotton plants infested or not with Aphis gossypii Glover (Hemiptera, Aphididae)

Alcantra, Eliana; Moraes, Jair Campos; Antônio, Alex; Alvarenga, Renata Ribeiro; Françoso, Jonas

doi:10.1590/s0085-56262011005000011

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…Studies have shown that using inductors like silicon (Si) enhances plant protection against abiotic and biotic stressors, due to the mechanical barrier created by the silica precipitation in the foliar tissues and in the trichomes, as well as the production of phenolic compounds, chitinases, peroxidases and lignin, which can all interfere with the physiology and development of insect pests (Alcantra et al, 2011;Adss et al, 2021). Si may act directly on insect herbivores by reducing insect growth and reproduction and thus reducing crop damage, or it may act indirectly through lower plant penetration, allowing natural enemies easier access to the crop (Reynolds et al, 2009;Züst and Agrawal, 2016).…”

Section: Introductionmentioning

confidence: 99%

Influence of Potassium Silicate on the Survival, Development and Reproduction of Aphis gossypii Glover (Hemiptera: Aphididae)

Tawfeek

Eldesouky

2022

Alexandria Science Exchange Journal

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Induced plant resistance is an important component of pest control. Therefore, effects of potassium silicate (K2SiO3) on the survival, development and reproduction of Aphis gossypii Glover at various life stages were tested under laboratory conditions. Efficacy of foliar spraying with K2SiO3 compared to lambda-cyhalothrin (LCH) against the field strain of A. gossypii third nymphal instar under greenhouse conditions as well as its impacts on the activity of antioxidant enzymes were also evaluated. In laboratory studies, K2SiO3 (LC50 = 58.21 mg L -1 ) was less toxic than LCH (LC50 = 44.32 mg L -1 ) against A. gossypii first nymphal instar after 48 h treatment. There was no significant difference in the developmental duration of total nymphal stages among the three treatment concentrations (LC10, LC25 and LC50) and the control. Treatments with K2SiO3 significantly reduced the longevity and fecundity of adult aphids. Reduction percentages of A. gossypii field strain after feeding on cotton leaves sprayed with K2SiO3 were 47.1 and 55.0 % at 100 and 200 mg L -1 , respectively, compared to 67.9 and 77.5% in LCH. The higher levels of catalase and polyphenol oxidase enzymes activities was observed at 24 h with percentages 68.16 and 32.74%, respectively, compared to the control, then declined and reached to minimum value at 96 h. However, peroxidase enzyme activity was increased with percentage 59.72 % at 12 h and decreased to reach minimum value at 48 h. This study could introduce promising plant resistance inductors for use in integrated pest management of A. gossypii on cotton plant.

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Section: Introductionmentioning

confidence: 99%

Influence of Potassium Silicate on the Survival, Development and Reproduction of Aphis gossypii Glover (Hemiptera: Aphididae)

Tawfeek

Eldesouky

2022

Alexandria Science Exchange Journal

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“…Using principal component analysis, they studied antioxidant enzymes (i.e., catalase, ascorbate peroxidase, glutathione reductase, and superoxide dismutase activity), Cotton (Gossypium hirsutum) is a nonsilicon accumulator 18 and, as such, may be useful to study the biochemical effect of stress alleviation by silicon application. It has been reported that Si helped to mitigate aluminum toxicity 19 and to control the damage produced by insects in cotton; 20,21 however, the activity of antioxidant enzymes under silicon treatment has not been reported.…”

Section: ■ Introductionmentioning

confidence: 99%

Assessment of the Effect of Silicon on Antioxidant Enzymes in Cotton Plants by Multivariate Analysis

Moldes

Filho

Camiña

et al. 2013

J. Agric. Food Chem.

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Silicon has been extensively researched in relation to the response of plants to biotic and abiotic stress, as an element triggering defense mechanisms which activate the antioxidant system. Furthermore, in some species, adding silicon to unstressed plants modifies the activity of certain antioxidant enzymes participating in detoxifying processes. Thus, in this study, we analyzed the activity of antioxidant enzymes in leaves and roots of unstressed cotton plants fertilized with silicon (Si). Cotton plants were grown in hydroponic culture and added with increasing doses of potassium silicate; then, the enzymatic activity of catalase (CAT), guaiacol peroxidase (GPOX), ascorbate peroxidase (APX), and lipid peroxidation were determined. Using multivariate analysis, we found that silicon altered the activity of GPOX, APX, and CAT in roots and leaves of unstressed cotton plants, whereas lipid peroxidation was not affected. The analysis of these four variables in concert showed a clear differentiation among Si treatments. We observed that enzymatic activities in leaves and roots changed as silicon concentration increased, to stabilize at 100 and 200 mg Si L(-1) treatments in leaves and roots, respectively. Those alterations would allow a new biochemical status that could be partially responsible for the beneficial effects of silicon. This study might contribute to adjust the silicon application doses for optimal fertilization, preventing potential toxic effects and unnecessary cost.

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Spatial distribution of adult Anthonomus grandis Boheman (Coleoptera: Curculionidae) and buds with feeding punctures on conventional and Bt cotton

et al. 2013

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Dispersion patterns of Anthonomus grandis adults and damaged squares with their feeding punctures are important to enhance pest monitoring and control on cotton. In this research we performed probabilistic analyses of the distribution patterns of adults and squares with feeding punctures of A. grandis on two cotton genotypes, Bt and non-Bt near isogenic lines. We conducted the field experiment in two experimental areas; each area had 100 plots composed of seven rows, each seven metros long. Between Jan and May 2010, 16 samplings were made, in each, five plants were evaluated per plot by counting the adults and damaged squares. The dispersion indexes (ratio of the variance/mean, the Morisita index, and Exponent k of the Binomial Negative Distribution) and the theoretical distribution of frequencies (Poisson, Negative Binomial and Positive Binomial) were calculated. No differences between cotton genotypes were found. The spatial distribution of A. grandis adults fit the Negative Binominal (aggregate) and Positive Binominal (uniform) distributions, depending on the number of days after cotton emergence. The dispersion analyses of the feeding damaged squares on the Bt and conventional cotton revealed Poisson (random), Negative Binominal (aggregate) and Positive Binominal (uniform) distribution patterns in sequence during the crop cycle.

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Effect of silicon and acibenzolar-s-methyl on colored cotton plants infested or not with Aphis gossypii Glover (Hemiptera, Aphididae)

Cited by 3 publications

References 15 publications

Influence of Potassium Silicate on the Survival, Development and Reproduction of Aphis gossypii Glover (Hemiptera: Aphididae)

Influence of Potassium Silicate on the Survival, Development and Reproduction of Aphis gossypii Glover (Hemiptera: Aphididae)

Assessment of the Effect of Silicon on Antioxidant Enzymes in Cotton Plants by Multivariate Analysis

Spatial distribution of adult Anthonomus grandis Boheman (Coleoptera: Curculionidae) and buds with feeding punctures on conventional and Bt cotton

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