Binomial sampling plan to estimate Sitobion avenae (F.) (Hem.: Aphididae) population in irrigated wheat fields of Miyaneh, Iran
Subject Areas :
Keywords: Monitoring, spatial distribution, Sitobion avenae, Binomial sampling,
Abstract :
In order to estimate Sitobion avenae population density in Miyaneh region, northwest of Iran, spatial distribution of the aphid was studied and binomial sampling plans were developed at precision levels of 10 and 25%. Sampling was carried out every three days by examining 100 wheat stems and counting the aphids. The mean and variance of aphid population in each sampling were used to estimate spatial distribution parameters. According to the Taylor's power law and regarding to better description of the obtained data, the technique was used to develop binomial sampling plans at 10 and 25% precision levels. Based on the results, S. avenae showed clumped spatial distribution. Binomial sampling plan was better than enumerative one, because of reduction in sample size required for sampling aphid populations. In conclusion, the binomial sampling plans at 25% precision level was recommended for monitoring S. avenae population in irrigated wheat fields in Miyaneh region.
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