Результаты поиска по 'rugose spiraling whitefly':
Найдено статей: 2
  1. Suganya G., Senthamarai R.
    Analytical Approximation of a Nonlinear Model for Pest Control in Coconut Trees by the Homotopy Analysis Method
    Computer Research and Modeling, 2022, v. 14, no. 5, pp. 1093-1106

    Rugose spiraling whitefly (RSW) is one of the major pests which affects the coconut trees. It feeds on the tree by sucking up the water content as well as the essential nutrients from leaves. It also forms sooty mold in leaves due to which the process of photosynthesis is inhibited. Biocontrol of pest is harmless for trees and crops. The experimental results in literature reveal that Pseudomallada astur is a potential predator for this pest. We investigate the dynamics of predator, Pseudomallada astur’s interaction with rugose spiralling whitefly, Aleurodicus rugioperculatus in coconut trees using a mathematical model. In this system of ordinary differential equation, the pest-predator interaction is modeled using Holling type III functional response. The parametric values are calculated from the experimental results and are tabulated. An approximate analytical solution for the system has been derived. The homotopy analysis method proves to be a suitable method for creating solutions that are valid even for moderate to large parameter values, hence we employ the same to solve this nonlinear model. The $\hbar$-curves, which give the admissible region of $\hbar$, are provided to validate the region of convergence. We have derived the approximate solution at fifth order and stopped at this order since we obtain a more approximate solution in this iteration. Numerical simulation is obtained through MATLAB. The analytical results are compared with numerical simulation and are found to be in good agreement. The biological interpretation of figures implies that the use of a predator reduces the whitefly’s growth to a greater extent.

    Keywords: mathematical model, Pseudomallada astur, rugose spiraling whitefly, coconut trees, homotopy analysis method, $\hbar$-curves.
  2. Suganya G., Jenitta E., Senthamarai R.
    A study on the dynamics of pest population with biocontrol using predator, parasite in presence of awareness
    Computer Research and Modeling, 2024, v. 16, no. 3, pp. 713-729

    The coconut tree is often mentioned as the “tree of life” due to its immense benefits to the human community ranging from edible products to building materials. Rugose spiraling whitefly (RSW), a natural enemy seems to be a major threat to farmers in bringing up these coconut trees. A mathematical model to study the dynamics of pest population in the presence of predator and parasite is developed. The biologically feasible equilibrium points are derived. Local asymptotic stability as well as global asymptotic stability is analyzed at the points. Furthermore, in order to educate farmers on pest control, we have added the impact of awareness programs in the model. The conditions of existence and stability properties of all feasible steady states of this model are analyzed. The result reveals that predator and parasite play a major role in reducing the immature pest. It also shows that pest control activities through awareness programs further reduce the mature pest population which decreases the egg laying rate which in turn reduces the immature population.

    Keywords: mathematical model, rugose spiralling whitefly, predator, parasite, stability.

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