Considering the resistance development-potential of whitefly (Bemisia tabaci) against control tactics with limited action mechanisms, the present study investigated the accumulation of two different silicon (Si) sources (SiO2 and K2SiO3) in cotton plants. The tested dose rates (0, 200, and 400 mg/L) of both Si sources were applied directly to the soil or through foliar application on cotton leaves. Moreover, a laboratory bioassay was also conducted to evaluate the performance of applied Si sources against the oviposition preference and biology of B. tabaci. A significantly higher Si accumulation, reduction in oviposition preference, and prolonged developmental period of all nymphs and total life cycle of B. tabaci was observed in the case of foliar-applied silicon. Similarly, among Si sources, a significant decline in the number of oviposited eggs and delay in the developmental period of B. tabaci was observed in the case of SiO2, followed by K2SiO3. Moreover, cotton plants subjected to SiO2 treatments possessed higher Si contents in their leaves than K2SiO3 treated plants. The results further revealed that both Si sources showed promising results at their higher concentrations regarding the tested parameters of Si accumulation, fecundity, and developmental period of B. tabaci. Our results strongly suggest that among emerging pest control strategies in cotton plants lies the use of foliar application of Si, which can also be incorporated in different integrated pest management programs due to its safety for humans and beneficial insect fauna.
KAUST Repository Item: Exported on 2022-09-09
Acknowledgements: The corresponding author acknowledges financial support provided by Higher Education Commission (HEC) of Pakistan under International Research Support Initiative Program (34th meeting awardees). The corresponding author thanks Judith K Brown, School of Plant Sciences, University of Arizona, (USA) for accepting him in her Lab under International Research Support Initiative Program (IRSIP) lead Higher Education Commission (HEC) of Pakistan. The author also Mary Kay Amistadi (Lab Manager), Department of Soil, Water & Environmental Science, University of Arizona (USA) for her kind and scholastic guidance during sample preparation for ICP-MS analysis.
- Renewable Energy, Sustainability and the Environment
- Management, Monitoring, Policy and Law
- Geography, Planning and Development