Development of cotton pests exhibiting different feeding strategy on water-stressed and kaolin-treated cotton plants

Bestete, Luziani Rezende; Torres, Jorge B.; Silva, Rebecca B. B.; Silva-Torres, Christian S. A.; Bastos, Cristina Schetino

doi:10.1007/s10340-016-0773-4

Cited by 12 publications

(10 citation statements)

References 35 publications

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“…Alabama argillacea and C. includens specimens were obtained from the rearing colonies of this laboratory and fed on a semi-natural diet (Bestete et al, 2017).…”

Section: Insects and Fungus Isolatesmentioning

confidence: 99%

“…Moreover, the polyphagia requires more complex physiological mechanisms to confront the host plant chemicals (Sarate et al, 2012), which may explain the mortality differences between these two insect species. Thus, the response of lepidopteran species appears to depend on the host specialization level, with a stronger response among monophagous species to variations in host quality compared to polyphagous species (Bestete et al, 2017). The combination of kaolin + B. bassiana may increase the mortality of C. includens, but not that of A. argillacea.…”

Section: Susceptibility Of Larvae To Kaolin and B Bassianamentioning

confidence: 99%

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Susceptibility of Alabama argillacea and Chrysodeixis includens (Lepidoptera: Noctuidae) larvae to Beauveria bassiana associated with kaolin

2021

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The mortality of the Alabama argillacea and Chrysodeixis includens (Lepidoptera: Noctuidae) larvae caused by the kaolin inert powder and the entomopathogenic fungus Beauveria bassiana were determined under laboratory conditions. Using the caterpillar submersion method, the CG 138 B. bassiana isolate was more pathogenic to A. argillacea than the CG 70, GC 82, ESALQ 634, and ESALQ 645. All five tested isolates caused similar mortality of C. includens. The mortality of first-instar larvae of A. argillacea and C. includens by feeding on leaf-disc impregnated with B. bassiana (CG 138) and kaolin was also determined. Higher A. argillacea mortalities were observed in the B. bassiana (CG 138) treatments, regardless of the presence of kaolin. However, the activity of kaolin + B. bassiana (CG 138) against C. includens was higher than each ingredient alone, indicating an additive action against C. includes larvae. The mortality of A. argillacea and C. includens larvae treated with kaolin + B. bassiana (CG 138) was similar, and the A. argillacea mortality was higher than that of C. includens with kaolin and B. bassiana (GC 138) separated. The treatment kaolin + B. bassiana (CG 138) is promising for the simultaneous management of these two defoliator pests, mainly A. includes. In addition, the monophagous A. argillacea is more susceptible to both kaolin and B. bassiana (GC 138) than the polyphagous C. includens, suggesting that the nutritional ecology plays an important role in the susceptibility of these defoliator species to alternative insecticides.

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“…Alabama argillacea and C. includens specimens were obtained from the rearing colonies of this laboratory and fed on a semi-natural diet (Bestete et al, 2017).…”

Section: Insects and Fungus Isolatesmentioning

confidence: 99%

Section: Susceptibility Of Larvae To Kaolin and B Bassianamentioning

confidence: 99%

Susceptibility of Alabama argillacea and Chrysodeixis includens (Lepidoptera: Noctuidae) larvae to Beauveria bassiana associated with kaolin

2021

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“…Cotton is one of the most important crops for ber and oil and thus has important economic value in the world. Cotton plants are susceptible to damage by pests and diseases, which decreases yield and quality and results in economic losses [1][2][3]. For sustainable ber production and to minimize the damages caused by a diversity of pests, it is essential to develop varieties that can withstand the ravages of various insect pests.…”

Section: Introductionmentioning

confidence: 99%

Expression of modified snowdrop lectin (Galanthus nivalis agglutinin) protein confers insect resistance in Arabidopsis and cotton

He¹,

Wu²,

Tian³

et al. 2020

Preprint

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Background: Cotton is a major fiber crop in the world that can be severely infested by pests in agricultural fields. Identifying new insect-resistance genes and increasing expression of known insect-resistance genes are imperative in cultivated cotton. Galanthus nivalis agglutinin, a type of plant lectin that is reportedly toxic towards Homoptera sap-sucking pests when administered in their artificial diet or when fed transgenic plant material expressing the gene. The natural GNA gene is mainly expressed in monocotyledons instead of in dicotyledons, thus modification of the gene is necessary to effectively express the GNA gene in transgenic cotton. Results: We report the artificial synthesis of a modified GNA gene (ASGNA), via codon augmentation, and its insertion into Arabidopsis thaliana and cotton to test its efficacy as an insect-resistance gene against cotton aphids and Plutella xylostella. The level of ASGNA expression in transgenic plants was determined by the enzyme-linked immunosorbent assay (ELISA), and the amount of ASGNA among transgenic plants reached approximately 6.5 μg/g fresh weight. A feeding bioassay showed that survival and reproductive rates of aphids fed transgenic tissues were significantly lower than those fed wild type tissues. Likewise, larvae mortality of P. xylostella fed with transgenic plants showed significantly increased levels. Similar results were recorded of aphids feeding on cotton cotyledons with transient expression of ASGNA. Conclusions: Altogether, results show that ASGNA exhibited high insecticidal activity towards sap-sucking insects and is a promising candidate gene to improve insect resistance in cotton and other dicot plants.

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“…This contrasts with those heteropterans that feed directly from the phloem, in which the extraction of nutrients relies on a differential osmotic gradient to move food contents (Sharma et al 2014), and thus allows feeding on relatively more dehydrated plants (e.g. Tariq et al 2012, Bestete et al 2016, Tan et al 2017).…”

Section: Host Use Across Different Environmentsmentioning

confidence: 98%

Feeding ecology of green mirids: polyphagy and spatio-temporal dynamics across arid and agricultural environments

Cappadonna¹

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Development of cotton pests exhibiting different feeding strategy on water-stressed and kaolin-treated cotton plants

Cited by 12 publications

References 35 publications

Susceptibility of Alabama argillacea and Chrysodeixis includens (Lepidoptera: Noctuidae) larvae to Beauveria bassiana associated with kaolin

Susceptibility of Alabama argillacea and Chrysodeixis includens (Lepidoptera: Noctuidae) larvae to Beauveria bassiana associated with kaolin

Expression of modified snowdrop lectin (Galanthus nivalis agglutinin) protein confers insect resistance in Arabidopsis and cotton

Feeding ecology of green mirids: polyphagy and spatio-temporal dynamics across arid and agricultural environments

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