Indian Journal of Entomology

Simple random sampling plan was formulated for okra fruit borer, Earias vitella F. infestation using parameters of Taylor's power law with accuracy within 10 and 20% coefficient of variation (CV). The values of aggregation parameter (b) of Taylor's power law >1.0 indicated contagious distribution of fruit borer infestation on okra fruits during both consecutive years. Sampling requirement with simple random sampling decreased with an increase in fruit borer infestation on okra. The number of samples was required about four times with accuracy within 10% CV as compared to 20% CV. Sequential sampling plan was devised using parameters of Taylor's power law (a=1.336, b=1.104), economic injury level as 5.3% infested fruits and probability level of 20%. Sequential plan would prove very useful in the proper intervention of control operation particularly at very low and very high fruit borer infestation. The sequential plan could reduce the sampling effort in comparison to simple random sampling, thereby proving to be more efficient.