National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The modeling of insects/pests population dynamics is to understand how the respective population change arises owing to the interplay of environmental forces, density dependent regulation and inherent stochasticity imbibed in the system. Enormous applications of such modeling are found in natural science. It is quite obvious that excess zeros are common phenomenon in counting insects. If data is not properly modelled, these properties can invalidate the normal distribution assumptions resulting in biased estimation of parameters and distress the integrity of the scientific inferences. Therefore, it is recommended that statistical models appropriate for handling such data and selecting appropriate model to ensure efficient statistical inference. Hence, a study has been undertaken to model the occurrence of rice leaf folder infestation on boro rice, at Terai region. This study provides the basic needs of parameter estimations for different fitted linear and nonlinear models, determination of undertaking optimum time of plant protection measures. Based on different model selection criterion, Cubic model is found to be the best and accordingly determine the optimum time i.e. 60 DAT, when any plant protection measure to be adopted in the field.
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