TY - JOUR T1 - Study of Spatial Distribution of the Hawthorn (Crataegus monogyna) Trees Attacked by Orchard Ermine (Yponomeuta padella) in Bazoft Forests of Chaharmahal and Bakhtiari Province TT - بررسی الگوی پراکنش درختان ولیک (Cratagus monogyna) آلوده به لیسه (Yponomeuta padella) در جنگل‌های بازفت استان چهارمحال و بختیاری JF - IJAE JO - IJAE VL - 4 IS - 14 UR - http://ijae.iut.ac.ir/article-1-722-en.html Y1 - 2016 SP - 39 EP - 49 KW - Forest tree distribution KW - Hawthorn KW - Orchard ermine KW - Density KW - K- function KW - Eberhart index KW - Bazoft. N2 - Forest trees demonstrate different distribution patterns, depend on their living condition (Such as pest infestations). Forest density and epidemic pest concentration are hypothetically among the most influential factors. The current study was carried out on distribution pattern of the orchard ermine (Yponomeuta padella) infested hawthorn trees (Crataegus monogyna) in Bazoft river watershed in Central Zagros. Nine sites were selected with different infections. The site selection was based on pollution and position (North or South) it. Pollution, density of trees and coordinates (X , Y) were recorded for each tree. Eberhart and Ripley’s K functions were used to elucidate the infested and non-infested tree distribution. The results showed a clumped distribution of the trees in sound sites and in infested sites with high hawthorn density. Trees in low-dense infested sites had a tendency toward more random and even uniform population distribution. M3 10.18869/acadpub.ijae.4.14.39 ER -