Document Type : Agricultural Entomology
Authors
- Shahram Shahrokhi 1
- Shahla Bagheri Matin 2
- Naser Moini Naghadeh 3
- Hasanali Vahedi 3
- Farzad Jalilian 2
1 Iranian Research Institute of Plant Protection, sunn pest Research Department
2 Agricultural and Natural Resources Research and Education Center , AREEO, Kermanshah, Iran
3 Department of Plant Protection, College of Agriculture, Razi University, Kermanshah, Iran
Abstract
The English grain aphid, Sitobion avenae, is a numerous aphid in wheat fields of Iran. Population growth modeling is of importance in integrated pest management programs, so this study was carried out to develope appropriate models for predicting population of S. avenae in wheat fields of Mahidasht region of Kermanshah. Weekly sampling was carried out to count the aphid population on 10,000 wheat tillers in a two-hectare field during five years of 2017, 2018, 2019, 2020 and 2021 and 100 data series was used for modellig its population. Based on the results, Exponential and Logistic models were not suitable for predicting the aphid population in the whole season, but both Normal and hyperbolic Secant Square models were confirmed based on statistical and biological criteria, so that they were able to estimate aphid population during the agricultural season. In the other word, both Normal and hyperbolic Secant Square models well fitted with the related data and presented a logical description of S. avenae population fluctuations, so they can be used to predict the aphid population in wheat fields of Mahidasht region of Kermanshah provicd and other regions with similar climate.
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