摘要
为了预报和防控章古台地区樟子松梢斑螟的危害,运用6种聚集度指标、Taylor幂法则、Iwao回归模型,分析了章古台地区樟子松梢斑螟Dioryctria mongolicella幼虫的空间分布型。结果表明,梢斑螟对樟子松的危害不存在方位偏好,除后坨子北以外的5块样地都处于重度危害程度,这6块样地之间球果被害率和虫口密度都无显著差异,种群呈聚集分布,聚集原因是由于环境因素影响,且具有密度依赖性。通过对樟子松梢斑螟的危害状况和分布情况进行分析,为今后虫害预测预报和防治策略制定提供理论基础。
The spatial distribution pattern of Dioryctria mongolicella larvae in Zhanggutai area was investigated by using six aggregation indexes,Taylor’s Power Law and Iwao’s regression model,so as to predict and control the damage of Dioryctria mongolicella to Pinus sylvestris var.mongolica in Zhanggutai area.The results showed that there was no orientation preference for the damage of D.mongolicella to P.sylvestris var.mongolica,and the five plots except the north of Houtuozi were in the severe damage degree.There was no significant difference in the damage rate and population density of cones between the six plots.The population showed an aggregated distribution,which was due to the combined effects of environment and its density dependence.Through the analysis of damage and distribution of D.mongolicella,it provides a theoretical basis for the future pest prediction and prevention strategies.
作者
马庆辉
马庆
MA Qinghui;MA Qing(Liaoning Institute of Sandy Land Control and Utilization,Fuxin 123000,China)
出处
《辽宁林业科技》
2023年第3期9-12,共4页
Liaoning Forestry Science and Technology
基金
民生科技计划联合计划(20211030340-JH2102)。
关键词
樟子松
梢斑螟幼虫
危害状况
空间分布
Pinus sylvestris var.mongolica
Dioryctria mongolicella larvae
damage investigation
spatial distribution
