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

Abstract

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.

Effect of Foliar Fertilization with Potassium Silicate on some Morphological Characters of Strawberry Leaves Reducing Sucking Insects

“…The third treatment was distinguished by its superiority over the rest of the treatments with clear significant differences. [15], show that treatment with potassium silicate at a lower concentration prevents cotton aphid Aphis gossypii from reaching adulthood by inhibiting the completion of their life cycle.…”

Toxicity and Biochemical Effects of Spirotetramat and its Binary Mixtures with Nanosilica against Aphis gossypii Glover, Bemisia tabaci Gennadius and the Earthworm, Eisenia fetida

“…The problems resulting from excessive use of traditional insecticides could be overcome with the development of new alternate pest control strategies to protect the environment from the insecticidal pollution, limit the resistance regenerating and increase agriculture crop productivity (Eldesouky 2019 andTawfeek &Eldesouky, 2022). One of the most promising new approaches for pest control in recent years, the use of nanoparticles in pesticide formulations, where nanotechnology has picked up prevalence at a fast pace in various field and disciplines with special mention in environmental and agricultural systems (Khamis et al, 2017).…”

Evaluation of Certain Botanical Extracts and Synthetic Insecticides against Whitefly, Bemisia tabaci (Gennadius) and Cotton Aphid, Aphis gossypii L. on Cucumber (Cucumis sativus L.) under Field Condition

“…Botanical extracts are less harmful to the environment, less toxic to humans and lower in cost than the use of insecticides (Dougoud et al, 2019). The botanical insecticides can reduce the viability of insect eggs, slowing the growth of insect and can cause insect mortality (Da Silva et al, 2017;Bedini et al, 2020;Tawfeek and Eldesouky, 2021). Recently, surveys of plant families have discovered different botanical insecticides that could be able to meet some of the desired demands (Lydon and Duke 1989;MacKinnon et al, 1997).…”