Bt玉米(MG95)对粘虫的抗性和拒食作用

在室内以我国自主培育的转Bt基因玉米 (简称 :Bt玉米 )为材料 ,测定了Bt玉米对不同龄期 ( 1～ 4龄 )粘虫PseudaletiaseparataWalker的影响。测定指标包括 :幼虫体重、幼虫发育历期、幼虫死亡率、化蛹率、蛹重、蛹历期、羽化率、产卵量、成虫历期、卵孵化率。结果显示 :用Bt玉米喂养的 1～ 4龄幼虫在处理 6d及 1～ 3龄幼虫在处理 9d时的体重与对照相比均差异显著 ;除 1龄幼虫外 ,2～ 4龄幼虫处理 6d及 2～ 3龄幼虫处理 9d后的死亡率差异不显著 ;用Bt玉米喂养的各龄幼虫发育历期延长 ,与对照相比差异显著 ;1、2龄幼虫的化蛹率与对照相比有显著差异 ,3、4龄则差异不显著 ;1～ 4龄幼虫的蛹重、蛹历期及羽化率均差异显著 ;成虫历期仅 1龄幼虫差异显著 ;与对照相比 ,各龄粘虫的产卵数、卵孵化率均无显著差异。结果表明 ,1龄幼虫对Bt玉米最为敏感。另外 ,拒食实验结果显示 ,在实验开始后的 8,1 6,2 4,3 2及 48h ,非选择性测定的拒食率为 63 2 0 ,64 60 ,48 99,2 3 3 5和 0 5 4% ,选择性测定的拒食率为98 3 3 ,82 43 ,71 5 4,40 1 6和 0 2 7% ,总体趋势是拒食率随时间延长而降低 ,48h后Bt玉米对粘虫幼虫无拒食活性。     

三种主要环境因子对茶尺蠖核型多角体病毒毒力的影响

本文对温度、紫外线和茶园露水对茶尺蠖核型多角体病毒(EoNPV)毒力的影响进行了研究。结果表明,在18—26℃下,适于病毒感染各龄幼虫,幼虫病死率达100％;但在30、34℃下,除1龄初饲毒外,病死率、化蛹率和羽化率明显下降或上升,3龄初或其以后饲毒,74％以上幼虫能化蛹,89％以上蛹能羽化。离体病毒经45℃处理2天,毒力开始明显减退。紫外线照射2—8分钟,离体病毒毒力减退不明显;照射16分钟,毒力开始明显减退。紫外线对离体病毒的影响与温度及病毒浓度有关。茶园露水对离体病毒无明显影响。     

取食转Bt+CpTI基因棉花的棉蚜对普通草蛉生长发育及繁殖力的影响

【目的】研究取食转Bt+CpTI基因棉花的棉蚜Aphis gossypii Glover对普通草蛉Chrysopa carnea Stephens生长发育及繁殖力的影响,为转Bt基因抗虫棉花的推广和应用提供理论支持。【方法】普通草蛉取食转Bt+CpTI棉花SKG321和对照品种石远321棉花上的棉蚜后,对普通草蛉生长发育情况进行研究,并对其幼虫、蛹的存活率和成虫的羽化率及产卵量进行分析。【结果】取食转Bt+CpTI棉花上的棉蚜对普通草蛉的各龄幼虫发育历期、蛹期和产卵前期无不利影响;处理与对照间各龄幼虫存活率、蛹的存活率和成虫羽化率之间没有显著差异;取食转Bt+CpTI棉花上棉蚜的普通草蛉单雌日产卵量与对照相比没有减少,而25 d内的单雌总产卵量与对照相比差异亦不显著。【结论】取食转Bt+CpTI棉花上的棉蚜对普通草蛉的生长发育及繁殖力无负面影响。     

八种杀虫剂对韭菜迟眼蕈蚊发育和繁殖的亚致死效应

用胃毒触杀法确定8种常用杀虫剂对韭菜迟眼蕈蚊Bradysiaodoriphaga 3龄幼虫的LC₂₀和LC₅₀剂量后,以其LC₂₀分别处理3龄幼虫,将存活幼虫正常饲养,测定该剂量药剂对韭菜迟眼蕈蚊化蛹率、蛹重、羽化率,成虫存活率、雌雄比、单雌产卵量及卵孵化率等指标的影响。结果表明:毒死蜱等4种药剂的影响较显著,其影响程度由高到低依次为毒死蜱＞辛硫磷＞阿维菌素溴虫腈;而另4种药剂丙硫克百威、灭多威、丁硫克百威和吡虫啉则影响不显著。此外也测定了用后4种药剂LC₅₀剂量处理的存活试虫的上述生物学指标,结果表明：除化蛹率和羽化率较对照降低且差异显著外,其他生物学指标与对照处理无明显变化。     

浙江茶尺蠖地理种群已分化成为不同种

【目的】明确茶尺蠖Ectropis obliqua Prout不同地理种群的种群分化和生殖隔离程度。【方法】对分别在浙江杭州和衢州两地田间采集的茶尺蠖杭州种群（H）和衢州种群（Q）两个种群,进行形态学鉴定、生物学特征观察以及正反交试验。【结果】形态学与生物学观察结果表明,除Q种群的体形较大和体翅颜色略深外,两个种群的外部形态、生殖器解剖结构和雌蛾产卵量等基本相同。遗传杂交试验结果表明,无论是正交还是反交,杂交后均能获得子一代（F1）;与种群内自交相比,杂交后雌成虫的产卵量下降,卵的孵化率显著降低;幼虫的历期明显缩短且化蛹时间分布不规则,蛹重变轻;蛹的羽化率降低,羽化的成虫雌雄性比严重失调。【结论】茶尺蠖杭州种群（H）和衢州种群（Q）两个种群存在生殖隔离,有明显的种群分化,应属于不同种。     

饥饿程度对美国白蛾生长发育和繁殖的影响

不同龄期幼虫饥饿对美国白蛾Hyphantria cunea(Drury)生长发育和繁殖影响的研究结果表明:美国白蛾低龄(2龄)幼虫短时间的饥饿对其生长发育和繁殖的影响不明显;美国白蛾中龄(4龄)幼虫饥饿2,4,6d使美国白蛾的历期相应增长,存活率、化蛹率、羽化率、产卵量都相应降低,交配率与对照之间没有差异;老熟(6龄)幼虫短时间饥饿(4d)的存活率、羽化率、交配率、产卵量都稍有下降;长时间饥饿(12d)的老熟幼虫有70%左右因饥饿而提前化蛹,提前化蛹的蛹体外没有薄茧的包裹。提前化蛹的美国白蛾的羽化率、交配率均非常低,产卵量很少。     

短时高温对绿豆象各虫态生长发育的影响

【目的】为明确短时高温对绿豆象Callosobruchus chinensis (L.)各虫态及其后虫态生长发育与繁殖能力的影响。【方法】以27℃饲养的绿豆象为对照,在30、33、36、39、42和45℃条件下分别对绿豆象卵、幼虫、蛹和成虫进行3 h的短时高温处理。【结果】短时高温对绿豆象卵的孵化率、幼虫的化蛹率和蛹的羽化率均有显著影响,但对卵和幼虫的后续发育影响不显著;幼虫耐高温的能力最强,经短时高温处理后化蛹率均在90%以上;蛹经45℃短时高温处理后虽表现出较高的羽化率,但羽化后成虫的寿命和产卵量均显著降低。卵期、幼虫期和成虫期绿豆象对短时高温的耐受性均有性别差异,其中,卵期和蛹期雄虫耐热性强于雌虫,成虫期雌虫强于雄虫。短时高温处理对绿豆象成虫的繁殖能力影响显著,经45℃处理后成虫的产卵量为32.30粒/头,显著低于对照。【结论】39℃以上的短时高温对绿豆象处理虫态及雌雄性别比有明显的影响,对其后虫态发育的影响仅见高温处理蛹后导致成虫繁殖能力下降。     

梨小食心虫蛹重对成虫繁殖力和寿命及下一代幼虫发育的影响

【目的】本文旨在明确营养状况不同造成的梨小食心虫Grapholitha molesta(Busck)雌、雄蛹重量差异对其羽化的成虫产卵量、产卵期、寿命及下一代(F1)幼虫发育的影响。【方法】室内条件下,通过不同的饲养方法,获得个体重量不同的梨小食心虫雌、雄蛹,待其羽化交配后,记录其产卵量、产卵时间和成虫寿命;卵孵化前后,分别测量卵和初孵幼虫大小,计算卵孵化率,统计幼虫发育历期。【结果】雌蛹重量对梨小食心虫的成虫产卵量影响显著,其重量与产卵量呈正相关(y=15.505x-59.292);同一条件下,雌蛹与雄蛹重量也呈正相关(y=0.823x-0.538)。同时,雌蛹重量对成虫产卵期影响也较大,蛹重大的个体羽化的雌虫比蛹重小的个体羽化的雌虫产卵高峰期提前1 d;较重、中等和较轻蛹羽化出的雌虫个体每天产卵量高于10粒/雌的时间分别为9~10,7和5~6 d;产卵量高于5粒/雌的时间分别为12~13,9和6~7 d。而雄蛹重量对产卵量、雄成虫寿命影响没有明显影响。较轻的蛹羽化的雌成虫寿命比较重蛹羽化的雌成虫短2~3 d;而雄蛹重量对其羽化的雄成虫寿命影响没有明显规律。雌、雄蛹重量对其羽化成虫的卵孵化率、卵和初孵幼虫的大小影响均不显著,对F_1幼虫发育历期影响也不显著。【结论】梨小食心虫雌蛹重对羽化成虫的产卵量和产卵期等影响显著,田间防治时应注意在不同条件下完成发育的个体,尤其是雌虫,由于营养差异引起的个体大小对随后种群增长的影响。     

短时高温对金银花贮藏期害虫锯谷盗存活及繁殖的影响

【目的】了解短时高温对金银花Lonicera japonica Thunb.贮藏期害虫锯谷盗Oryzaephilus surinamensis(Linnaeus)存活及繁殖的影响。【方法】在室内测定了锯谷盗成虫经36、39、42、45、48℃高温处1、3、5、7 h后成虫存活率、产卵前期、产卵期、产卵量及F_1代孵化率和羽化率的差异。【结果】短时高温对锯谷盗成虫存活率、产卵前期、产卵期、产卵量及F_1代孵化率和羽化率均有显著影响,在36~48℃范围内,随着温度升高和时间的延长,成虫存活率不断下降、产卵前期不断延长、产卵期不断缩短、产卵量不断下降、F_1代孵化率和羽化率不断下降。经36、39、42、45、48℃高温处理7 h后,成虫存活率分别比对照下降了29.19%、34.47%、39.84%、55.64%和66.68%,产卵前期分别比对照延长了2.06、3.48、4.88、6.51、8.31 d,产卵期分别比对照缩短了4.99、7.89、12.07、16.89、23.14 d,产卵量分别比对照降低了52.26、61.06、70.82、82.87、92.97粒,F_1代孵化率分别比对照下降了21.52%、44.27%、73.44%、97.16%、100%,羽化率分别比对照下降了20.61%、32.85%、57.59%、95.15%、100%。方差分析显示,温度和时间的交互作用对成虫的存活率、F_1代的孵化率和羽化率均有显著影响(P<0.05),而对成虫产卵前期、产卵期和产卵量的影响不显著(P>0.05)。【结论】短时高温对金银花贮藏期害虫锯谷盗存活及繁殖有显著的影响,引起存活率及繁殖力显著下降。     

敲减神经肽F基因(npf)对亚洲玉米螟取食、生长发育和繁殖的影响

【目的】神经肽F(neuropeptide F, NPF)是无脊椎动物特有的一类神经肽,因其C末端是苯丙氨酸(F)而命名,参与昆虫的取食、生物节律、学习记忆等多种生理功能的调控。本研究旨在明确NPF对亚洲玉米螟Ostrinia furnacalis生长发育的影响,为害虫防治提供重要依据。【方法】采用一种基于工程菌高效合成靶向昆虫基因的dsRNA的方法经济有效地敲降npf,用低浓度(0.01%)和高浓度(0.02%)dsNPF和dsGFP(对照)分别饲喂亚洲玉米螟1龄初、3龄初和5龄初幼虫直至化蛹,检测5龄幼虫平均取食量、体重、体长、存活率和化蛹率,蛹羽化率和成虫产卵量,以及幼虫各龄期、蛹发育历期和成虫寿命。【结果】从亚洲玉米螟1, 3和5龄初幼虫开始饲喂0.01%和0.02% dsNPF时,与饲喂相应浓度dsGFP的对照相比,除个别点外,5龄幼虫的取食量、体重、体长、存活率和化蛹率,蛹羽化率和成虫单雌产卵量均显著降低,幼虫各龄期、蛹发育历期均显著延长,成虫寿命显著缩短。且dsNPF处理幼虫的龄期越早对发育的影响越大。其中0.01% dsNPF处理的1龄幼虫和0.02% dsNPF处理的3龄幼虫有90%的个体在蛹期死亡,而0.02%dsNPF处理的1龄幼虫有90%的个体在幼虫期死亡。【结论】结果提示NPF对亚洲玉米螟的发育和取食具有调控作用,这为探索新型绿色的害虫防治提供了依据。     

核型多角体病毒与侧沟茧蜂对斜纹夜蛾幼虫的协同作用

研究了斜纹夜蛾幼虫体内的斜纹夜蛾侧沟茧蜂存活率、发育历期、寄主感染病毒时间、病毒浓度之间的关系,并测定了斜纹夜蛾侧沟茧蜂的传毒效率．结果表明,病毒对寄主体内寄生蜂历期无明显影响,寄生在幼虫体内的寄生蜂能在寄主病死前完成发育,存活比例因寄主感染病毒的时间和浓度而异．斜纹夜蛾被寄生后接种病毒(SINPV),距离寄生时间越长,饲毒浓度越低,寄生蜂完成发育的比例越大,但饲毒时间是主要影响因素．从感病幼虫体内发育成的侧沟茧蜂或曾经在感病寄主上产过卵的寄生蜂,以及通过人工方式使产卵器被病毒污染的寄生蜂,均能携带一定数量的病毒．通过产卵活动,侧沟茧蜂成蜂能在寄主幼虫个体间传递病毒．当寄生蜂在感病的寄主幼虫上产卵带毒后,平均可传递病毒给2．14头幼虫;发育于感病幼虫体内的寄生蜂,平均可传递病毒给2．45头幼虫．通过用病毒液浸茧或用混有病毒的蜂蜜饲喂成蜂等方式使产卵器污染病毒的寄生蜂,传毒效率随饲毒浓度增加而提高,平均可传递病毒1．45头和0．94头幼虫     

Studies on the application of a nuclear polyhedrosis virus to control populations of the Egyptian cottonworm, Spodoptera littoralis

Variations in the resistance to nuclear polyhedrosis virus (NPV) were found in three populations of Spodoptera littoralis. The LD₅₀ for the most resistant population was 1.07 × 10⁴ PIB/5th instar larva as compared to 8.4 × 10² and 5.8 × 10² PIB/larva in the other two populations. The effect of NPV persisted in larvae which survived and pupated. Some of the pupae died, and those which survived produced normally shaped adults. While fecundity was sharply reduced in the less resistant populations, the effect on the most tolerant population was less pronounced. A 3-year-old inoculum, stored unprotected from daylight and without cooling, was much less effective even against the most sensitive larval population as compared to a relatively fresh and refrigerated batch. Larvae in their 6th instar proved to be approximately 10-fold more resistant to the NPV than 5th instar ones, while the difference in weight was only about twice. These variations in resistance to NPV are also discussed from the point of view of applying S. littoralis NPV in pest control schemes.     

灰飞虱长、短翅型品系对高、低温的适应能力差异

【目的】灰飞虱Laodelphax striatellus种群存在长翅和短翅个体,其翅型分化受遗传和环境条件的影响。本研究旨在明确经连续定向选育的灰飞虱长、短翅型品系对高、低温的适应能力差异。【方法】在室内分别长期定向筛选63和65代建立灰飞虱长、短翅型品系,并在南京田间采集灰飞虱自然种群;分别在25℃, 30℃和35℃恒温条件下测定上述灰飞虱长、短翅型品系和自然种群的繁殖力、存活率和发育历期,测定若虫在5℃和-20℃下的存活率以及若虫和成虫的过冷却点,通过品系间存活率、发育历期、生殖力和过冷却点的比较分析,确定灰飞虱长、短翅型品系对高温和低温的耐受能力。【结果】在25℃, 30℃和35℃下,灰飞虱自然种群雌成虫的繁殖力均显著高于室内筛选后的长、短翅型品系,而长、短翅型品系雌成虫之间的繁殖力均无显著差异;长、短翅型品系的繁殖力在25℃和30℃之间均无显著差异,但自然种群在25℃下的繁殖力显著高于30℃条件下的繁殖力;35℃下长、短翅型品系基本无若虫产生。25℃下长翅型品系、短翅型品系和自然种群若虫的存活率无显著差异,但在30℃下,短翅型品系若虫的存活率显著低于自然种群,而与长翅型品系差异不显著;35℃下长、短翅型品系的若虫最长只能存活到3龄,且两品系间无显著差异,而自然种群可存活到5龄。25℃下,短翅型品系若虫的发育历期显著短于自然种群,而与长翅型品系无差异;但是在30℃下,短翅型品系若虫历期显著长于长翅型品系和自然种群。长翅型品系、短翅型品系和自然种群灰飞虱3-4龄若虫在5℃低温下的存活天数无显著差异,并且长翅和短翅型品系在-20℃极端低温下暴露10 min后其死亡率也无显著差异且均显著高于自然种群。3个品系(种群)成虫的过冷却点无显著差异,但5龄若虫的过冷却点表现为短翅型品系显著高于自然种群,而与长翅型品系无显著差异。【结论】经连续定向选育的灰飞虱长、短翅型品系对低温和高温的适应力基本相当,且低于自然种群。在高温条件下灰飞虱短翅型品系的发育速率低于长翅型品系。     

大菜粉蝶颗粒体病毒对菜粉蝶幼虫取食、生长、发育的影响

菜粉蝶幼虫在一、二、三、四龄初期饲以大菜粉蝶颗粒体病毒(PbGV),食量减少99.3—38.4%;四龄末或五龄初饲毒,食量反而比健虫高出36.3%和87.2%。幼虫感病后取食期的缩短或延长是食量变化的主要原因。幼虫病死前脱皮过程先被抑制,其结果往往使得死亡时所处的龄期明显延长。幼虫在四龄末饲毒后,由于五龄期延长,食量增加,其死亡前达到的最高体重平均为357.9毫克,远高于健虫化蛹前的最高体重。PbGV对菜粉蝶化蛹也有明显影响。幼虫在五龄前饲毒,一般不能化蛹。五龄第1—3天饲毒,化蛹率26.4—87.9%,第4天饲毒对化蛹无影响。本文结果对应用PbGv防治菜粉蝶幼虫危害以及对该病毒的大量增殖均具指导意义。     

饲食感染SRBSDV的水稻病株对传毒介体白背飞虱相关能源物质含量的影响

南方水稻黑条矮缩病毒(Southern rice black-streaked dwarf virus, SRBSDV)近年对我国南方稻区水稻生产造成了极大危害。为探讨SRBSDV发生流行的原因,研究了饲食感染SRBSDV水稻病株对其介体昆虫白背飞虱体内能源物质含量的影响。结果表明,饲食感染SRBSDV水稻病株对白背飞虱若虫体内能源物质含量没有明显的影响,但是对雌成虫有明显的影响;饲食感染SRBSDV水稻病株使白背飞虱3日龄和5日龄雌成虫体内可溶性糖及游离氨基酸含量显著升高;此外,饲食感染SRBSDV水稻病株使5日龄雌成虫体内甘油酯含量和可溶性蛋白含量含量明显升高。上述结果证明饲食感染SRBSDV水稻病株会促进白背飞虱雌成虫体内糖类、脂类、氨基酸等物质的积累,有可能会导致其迁飞能力的提升,增加SRBSDV暴发流行的可能性。     

The developmental high wire: Balancing resource investment in immunity and reproduction

The strategic allocation of resources into immunity poses a unique challenge for individuals, where infection at different stages of development may result in unique trade‐offs with concurrent physiological processes or future fitness‐enhancing traits. Here, we experimentally induced an immune challenge in female Gryllus firmus crickets to test whether illness at discrete life stages differentially impacts fitness. We injected heat‐killed Serratia marcescens bacteria into antepenultimate juveniles, penultimate juveniles, sexually immature adults, and sexually mature adults, and then measured body growth, instar duration, mating rate, viability of stored sperm, egg production, oviposition rate, and egg viability. Immune activation significantly impacted reproductive traits, where females that were immune challenged as adults had decreased mating success and decreased egg viability compared to healthy individuals or females that were immune challenged as juveniles. Although there was no effect of an immune challenge on the other traits measured, the stress of handling resulted in reduced mass gain and smaller adult body size in females from the juvenile treatments, and females in the adult treatments suffered from reduced viability of sperm stored within their spermatheca. In summary, we found that an immune challenge does have negative impacts on reproduction, but also that even minor acute stressors can have significant impacts on fitness‐enhancing traits. These findings highlight that the factors affecting fitness can be complex and at times unpredictable, and that the consequences of illness are specific to when during an individual''s life an immune challenge is induced.     

Modified Behavior in Baculovirus-Infected Lepidopteran Larvae and Its Impact on the Spatial Distribution of Inoculum

Quantifying the rate of dispersal of target insects when infected with a disease agent will aid the development of biorational pest control programs. The effect of nucleopolyhedrovirus (NPV) infection on the mobility of second and fourth instarMamestra brassicaelarvae was investigated in the laboratory and field. NPV infection altered larval mobility, with the changes in behavior varying with the timecourse of infection. Diseased larvae moved three to five times further than healthy ones during the middle stages of infection. By the 7th day postinfection diseased larvae were less mobile than healthy counterparts. The same pattern of modified behavior was observed in both instars. Fourth instar larvae moved further than second instars under laboratory and field conditions. In the field, infected larvae tended to die on the apex of the cabbage leaves. Bioassay of the leaves showed a linear decrease in inoculum from central to peripheral plants within the plots, which occurred to the same extent for second and fourth instars. Leaves from plots where infected fourth instar larvae had been introduced had higher inoculum density than those from plots with second instars.     

Developmental and reproductive patterns of Triatoma brasiliensis infected with Trypanosoma cruzi under laboratory conditions

The aim of this work was to study the interaction between Trypanosoma cruzi-1 and Triatoma brasiliensis. A group of 1st instar nymphs was initially fed on T. cruzi-infected mice and a control group was fed on uninfected mice. From the second feeding onwards, both groups were otherwise fed on non-infected mice. The resulting adults were grouped in pairs: infected male/uninfected female, uninfected male/infected female, infected male and female and uninfected male/uninfected female. The infection affected only the 1st instar nymphs, which took significantly more time to reach the 2nd instar than uninfected nymphs. The differences in the molting time between the infected and uninfected nymphs from the 2nd to the 5th instars were not statistically significant. Both groups presented similar rates of nymphal mortality and reproductive performance was not significantly affected by infection in any of the treatments.     

Biology of the House Fly Predator <Emphasis Type="Italic">Carcinops pumilio</Emphasis> (Erichson) (Coleoptera: Histeridae)

Two larval instars of Carcinops pumilio (Erichson) were identified from a frequency distribution of the head capsule measurements. The total developmental time from egg to adult emergence averaged 20.5 ± 0.1 days at 30 °C. The 2nd instar was the longest, accounting for 39% of the total development time. The 1st instar larvae sustained the highest mortality of 26% whilst there was no mortality in the pupal stage. The immature stages sustained about 50% mortality before adult emergence. The adult females of C. pumilio can live for 140 days and the rate of survival was high in the young adults but decreased as the beetles aged. Newly emerged adults survived for 25.5 ± 0.4 days without feeding. The sex ratio was 0.48 females: 0.52 males. The intrinsic rate of natural increase (r_m) was 0.065, the generation time (T) was 50.019 days and the net reproduction rate (R_o) was 20.191.     

饥饿对扶桑绵粉蚧存活率和产卵量的影响

【背景】扶桑绵粉蚧是近年来入侵我国的重要害虫,食物是影响其生长发育及种群发展的重要因素。【方法】在室内条件下研究了饥饿对扶桑绵粉蚧不同龄期若虫和初羽化雌成虫存活率和雌成虫产卵量的影响。【结果】扶桑绵粉蚧不同虫态在饥饿条件下存活的时间存在显著差异,表现为雌成虫〉2龄若虫=3龄若虫〉1龄若虫。扶桑绵粉蚧各龄若虫和雌成虫随着饥饿时间的延长,存活率逐渐下降。其中,雌成虫存活率下降速度较慢,完全饥饿8d后存活率仍有50％左右;2、3龄若虫50％个体死亡需要饥饿的时间约为6d,1龄若虫约需5．5d。饥饿会显著降低1龄若虫存活率,但对2、3龄若虫没有显著影响。扶桑绵粉蚧雌成虫饥饿4d对其产卵前期、平均每头雌虫一生的产卵量没有显著影响,但寿命显著低于对照。【结论与意义】扶桑绵粉蚧耐饥力较强,这有助于它在野外建立种群。该结果为进一步评价扶桑绵粉蚧的入侵潜能提供了依据。