A fractional-order optimal control models for plant-locust surveillance mechanism with singular and non-singular derivative operatorsK. Ramalakshmi, B. Sundara Vadivoo and Hijaz AhmadEur. Phys. J. Spec. Top., (2025) 1-29DOI: https://doi.org/10.1140/epjs/s11734-024-01437-3