| 甜菜夜蛾核型多角体病毒对宿主种群的控制作用 |
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| 引用本文：蒋杰贤,胡颂平,季香云,刘劲军,袁永达.甜菜夜蛾核型多角体病毒对宿主种群的控制作用.植物保护学报,2004,31(4):383-389 |
| DOI：10.13802/j.cnki.zwbhxb.2004.04.009 |
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| 中文摘要:室内试验表明,甜菜夜蛾核型多角体病毒对宿主种群有明显的控制作用。当饲毒浓度在1.14×108PIBs/mL以上时,能引起97%的甜菜夜蛾幼虫死亡;饲毒后1~8天内,致死中浓度LC50值在8.4718×1052.6098×1012PIBs/mL之间;在饲毒浓度范围内,致死中时间LT50在1.98~6.99天之间;感病幼虫每日病死时间分布可用时间-剂量-条件死亡率模型较好地拟合,累计病死时间分布可用Gompertz模型拟合。室内试验还表明,病毒对甜菜夜蛾种群有明显的亚致死作用。免于病死蛹重量减轻,羽化所得雌成虫产卵量下降,产卵期延长;从感病高龄幼虫发育的成虫能将病毒传播至子代,引起20%~48%的子代幼虫死亡,并使子代成虫产卵量下降。田间试验表明,病毒除具有明显的控制作用外,还有一定的后效作用。 |
| 中文关键词:甜菜夜蛾 甜菜夜蛾核型多角体病毒 疾病流行模型 毒力测定 |
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| The control effect of Spodoptera exgiua nuclear polyhedrosis virus on its host population |
| Author Name | Affiliation | | JIANG Jie-xianl | Institute of Plant Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
Shanghai Key Lab. of Protected Horticultural Technology, Shanghai 201106, China | | HU Song-ping | Shanghai Agrobiological Gene Center, Shanghai 201106, China | | JI Xiang-yun | Institute of Plant Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China | | LIU Jin-jun | Institute of Plant Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China | | YUAN Yong-da | Institute of Plant Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China |
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| Abstract:The results of laboratory test indicated that the control effect of Spodoptera exigua nuclear polyhedrosis virus(SeNPV)on the beet armyworm,S.exigua(Lepidoptera:Noctuidae)was significant.Viral infection resulted in 97% larval mortality after the 3rd instar larvaewas infected by SeNPV at the concentration of 1.14×108 PIBs/mL or more.The LC50 valueswere 8.4718×105-2.6098×1012PIBs/mL from the 1st to 8th day after treatment,and the LT50 values were decreased from 6.9856 days at the concentration of 1.14×106 to 1.9817daysat the concentration of 1.14×109 PIBs/mL.The daily distribution of mortality could be wellsimulated with Time-Dose-Mortality model,and the daily distribution of the accumulated mortality of larvae was well fitted by Gompertz model.The results also showed that the SeNPV infection displayed a sublethal effect by decreasing the survival pupal weight,extending oviposition duration of adults,and decreasing the fecundity of adults;the adults developing from virus-infected larvae transmitted the virus to their progeny,causing 20%-48% mortality of nextgeneration neonates,and decreasing the fecundity of progeny adults.The results of field trialsshowed that this virus had also certain residual effects besides killing the S.exigua larvae. |
| keywords:Spodoptera exgiua Spodoptera exgiua nuclear polyhedrosis virus disease epizootic model virulence assay |
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