摘要
在室内测定了昆虫病原线虫(S.feltiaeOtio)对检疫性害虫——稻水象甲幼虫的致死中量(LC50,LC90)和致死中时间(LT50,LT90),旨在为大规模应用昆虫病原线虫防治稻水象甲提供理论依据。将TDM模型引入试验结果的分析中,得出了昆虫病原线虫防治稻水象甲幼虫的TDM模型以及LC50、LC90与LT50、LT90。S.feltiaeOtio对于稻水象甲幼虫剂量效应β值为1.22,在接种后第3~12d,S.feltiaeOtio不同时间段的LC50分别为115.57×106、30.48×106、12.60×106、7.27×106、3.14×106IJ/m2;不同时间段的LC90分别为1123.03×106、296.23×106、122.48×106、70.69×106、30.52×106IJ/m2。在0.1×106~0.8×106IJ/m2的浓度范围内,LT50的估计值范围为3.41~1.26d;同样,模型还给出3个高浓度处理的LT90值,即在0.4×106~1.6×106IJ/m2的浓度范围内,LT50的估计值范围为4.73~2.75d。
Rice water weevil (Lissorhoptrgs oryzophilgs Kusehel) is a kind of quarantine pest in the entry log. In order to provide the evidence for the wide usage of entomopathogenic nematode (Sfeltioe Otio ) in controlling the larva of rice water weevil, the experiments were done indoor to measure the median lethal dose and lethal time of rice water weevil larva infected by S.feltiae Otio, S,feltiae Otio was highly virulent to rice water weevil; with a dose-effect parameter of 1.22.A time-dose-mortality model was applied to analyze the mortality rate as affected by time and dose. LD50 and LD90 were 115.57×10^6、30.48×10^6、12.60×10^6、7.27×10^6、3.14×10^6,and 1123.03×10^6、296.23×10^6、122.48×10^6、70.69×10^6、30.52×10^6IJ/m^2, respectively, as assayed on the 3rd, 5th, 7th, 9th, 12th day after inoculation. LT50 was 3,41 to 1.26 d at the concentration 0.1×10^6 to 0.8×10^6 U/m^2 and L790 was 4.73 to 2.75 d at the concentration 0.4×10^6 to 1.6×10^6 IJ/m^2.
出处
《安徽农业科学》
CAS
北大核心
2006年第8期1620-1621,共2页
Journal of Anhui Agricultural Sciences
作者简介
孙文鹏(1979-),男,山东枣庄人。硕士研究生,研究方向:农业昆虫与害虫防治。
通讯作者。