烟粉虱及温室白粉虱为害后对后续粉虱种群的影响

【目的】分析烟粉虱Bemisia tabaci(Gennadius)或温室白粉虱Trialeurodes vaporariorum(Westwood)为害番茄后对后续温室白粉虱和烟粉虱生长、发育、成虫寿命和繁殖等产生的促进或抑制作用,可为明确寄主植物番茄介导的温室白粉虱-烟粉虱的种间互作,开展粉虱的科学防控提供科学依据。【方法】通过在寄主植物番茄叶片上先将B型烟粉虱或温室白粉虱按不同的顺序、时间间隔分开接种,再系统观察后续接上的两种粉虱生长、发育、繁殖等种群参数的变化。【结果】(1)先期接上烟粉虱对后续温室白粉虱的发育、寿命、产卵量有明显的促进作用;这种作用需烟粉虱的持续诱导,若去掉烟粉虱,其对温室白粉虱的促进作用即消失;先期接上温室白粉虱可缩短后续烟粉虱伪蛹期,但温室白粉虱的持续存在不利于烟粉虱的产卵,且明显降低烟粉虱的内禀增长率和净增殖率。(2)先后在番茄上同时接上温室白粉虱可降低后续烟粉虱的单雌产卵量和雌、雄虫的成虫寿命;先后同时接种烟粉虱却显著地增加了温室白粉虱的单雌产卵量;烟粉虱的提前存在降低了后续烟粉虱单雌产卵量。(3)但两种粉虱之间作用存在着一定的时间滞后性。烟粉虱对温室白粉虱的发育、寿命、产卵量产生的促进作用大约在其卵期后的一段时间才能显现出来;温室白粉虱对烟粉虱伪蛹期的缩短作用也需提前诱导;而温室白粉虱对温室白粉虱的促进作用相当滞后,直到成虫期才显现出来。【结论】B型烟粉虱和温室白粉虱之间可通过寄主番茄产生相互影响,前期烟粉虱为害可显著促进后续温室白粉虱卵和若虫的发育,而前期温室白粉虱为害对烟粉虱的发育不利。     

京郊温室白粉虱发生的初步观察和防治

<正> 自1976年以来,温室白粉虱Trialeurodesvaporariorum Westwood在京郊菜区连续发生为害,并由温室、大棚发展到露地,成为蔬菜生产中急需解决的问题。现将我们1977—1978年的观察和防治试验结果,简介如下。 一、寄主植物及为害性 温室白粉虱的寄主范围很广,能为害多种植物。在京郊蔬菜作物上,粉虱主要为害黄瓜、西红柿、茄子、菜豆、青椒、倭瓜等,其次还为害冬瓜、豌豆、莴笋等。在调查中发现,粉虱往往在叶背有毛刺的植物上,寄生数量大,为害严     

联苯菊酯防治温室白粉虱试验

<正> 温室白粉虱Trialeurodes vaporariorum(Westwood)自1975年以来,在蔬菜和园艺花卉种植区的温室内外,为害日趋严重,上升为主要害虫之一。1986年5～8月,我们用美国FMC公司提供的联苯菊酯(Biphenthrin)进行了防治试验。该药对白粉虱的成虫、若虫和“伪蛹”,均有较强的杀灭作用,现简介如下。     

利用中华草蛉防治温室白粉虱试验初报

1977年6月我们在四季青公社试验站利用饲养的中华草蛉对温室内主要为害黄瓜的瓜白粉虱Trialeu-rodes vaporariorum(Westwood)进行了防治试验,效果良好。现简报如下。     

温室白粉虱在雪莲果和烟草上的生物学特性比较

温室白粉虱Trialeurodes vaporariorum (Westwood)是雪莲果和烟草种植中主要害虫之一。雪莲果和烟草都是大叶寄主植物,本研究旨在比较温室白粉虱在雪莲果和烟草上的生物学特性,为利用雪莲果作为寄主植物大量繁育温室白粉虱和丽蚜小蜂提供参考依据。在人工气候室条件下,以雪莲果和烟草作为寄主植物繁育温室白粉虱,明确各龄期若虫的大小、发育历期、存活率、成虫产卵量和寿命。结果表明,温室白粉虱各龄若虫在雪莲果上均大于烟草上若虫;温室白粉虱在雪莲果上从卵到成虫发育需要19. 5 d,明显短于烟草上21. 1 d;在雪莲果和烟草上温室白粉虱卵到成虫的存活率分别为82. 0%和80. 0%,无显著性差异;温室白粉虱在雪莲果上单雌平均产卵量为166. 2粒,明显高于烟草上132. 7粒;温室白粉虱在雪莲果上雌、雄成虫平均寿命分别为31. 3 d和25. 0 d,明显长于烟草上27. 9 d和22. 0 d。本文研究结果表明,温室白粉虱在雪莲果上的生物学特性参数明显优于烟草,表明雪莲果适合作为大量繁育温室白粉虱的寄主植物,为进一步开发应用雪莲果为中间寄主植物大量繁育丽蚜小蜂提供了理论依据。     

番茄黄化曲叶病毒对温室白粉虱适合度的影响

【目的】温室白粉虱Trialeurodes vaporariorum(Westwood)是为害北方地区花卉蔬菜的主要粉虱种类,烟粉虱Bemisia tabaci(Gennadius)则在近些年逐渐频繁的花卉贸易活动中扩散至黑龙江省部分地区并取代了白粉虱成为当地温室害虫的优势物种,番茄黄化曲叶病毒(Tomato yellow leaf curl virus,TYLCV)是烟粉虱传播的一种重要双生病毒,对作物的危害十分严重,然而该病毒对本地白粉虱的影响及对烟粉虱与白粉虱种间竞争关系的影响尚待研究。【方法】本研究观察记录感染番茄黄化曲叶病毒的番茄植株上温室白粉虱和烟粉虱的种群动态及番茄形态和部分生理指标的变化。【结果】结果表明:1)有烟粉虱滋生的番茄植株矮小,根系发达;2)有白粉虱滋生的番茄略微矮粗,影响较小;3)感染病毒的番茄矮粗或矮小,根部无明显变化;4)染毒带虫相对于带虫处理而言,在白粉虱试验中,番茄植株矮小,根系生物量也骤减;与此相反,在烟粉虱试验中,番茄的反应相对缓和;5)此外,不同酶类对植株染毒的响应不同:Ach E酶活高不利于植株,而GST酶活高则有利于植株。【结论】总体而言:烟粉虱单独作用很不利于苗期番茄,白粉虱对苗期番茄没有明显的直接影响;而感染病毒会缓解烟粉虱对番茄的强烈刺激,而加重白粉虱对番茄的作用,即染毒使带白粉虱的苗期番茄生长发育受到明显抑制。与番茄变化情况相对应的是,染毒番茄上烟粉虱产卵较少,但在发育前期(从卵到伪蛹)存活率较高;染毒番茄上白粉虱产卵较多,但在前期存活率较低。本研究可为高纬度地区粉虱综合防控提供参考。     

温室白粉虱SCAR分子鉴定技术的建立及应用

温室白粉虱Trialeurodes vaporariorum是为害我国蔬菜作物的重大害虫之一。本研究采用随机扩增多态性DNA(Random Amplified Polymorphic DNA,RAPD)技术对温室白粉虱进行研究,筛选出一条620bp的特异性片段(GenBank登录号为JQ690764),据此片段的测序结果设计一对特异性的序列特异性扩增区(Sequence characterized Amplified Region,SCAR)标记(Tv-F和Tv-R),可成功从室内饲养的和从不同地区田间采集的温室白粉虱的基因组DNA中扩增出一条412bp的特异性条带,而不能从供试的其他粉虱类害虫中扩增出该相应条带。单头温室白粉虱成虫的基因组DNA稀释1000倍时,该SCAR标记仍可成功扩增出预期条带,显示出极高的灵敏度。该SCAR标记对温室白粉虱的基因组DNA扩增重复性和稳定性好,且操作简便,灵敏度高,可用于样品的大规模检测,为田间温室白粉虱的快速识别鉴定及其有效防治提供了技术基础。     

保护地间作芹菜对温室粉虱的防治作用

温室白粉虱Trialeurodes vaporariorum(Westwood)和烟粉虱Bemisia tabaci(Gennadius)是严重危害葫芦科、茄科和豆科等多种蔬菜的主要害虫,具有分布范围广、种群数量大、繁殖力强等特性。作者通过田间试验研究了蔬菜保护地内间作温室粉虱非嗜食植物芹菜(Apium graveliens L.)对其的防治效果。结果表明:与空白处理和常规化学防治相比,在番茄和黄瓜保护地内间作芹菜对温室粉虱均具有显著的防治效果,驱避效果分别达到98.0%和84.5%。这些结果是初步的,但其为进一步研究温室粉虱的寄主选择机制和非化学防治方法提供了依据。     

温室白粉虱对几种园艺植物的偏好性

温室白粉虱Trialeurodesvaporariorum是世界性害虫,每年都造成巨大的经济损失。研究了温室白粉虱在多种园艺植物混栽温室内对不同植物的选择性,结果表明在2 0种常见蔬菜和花卉中,可危害其中1 3种;温室白粉虱对其中6种寄主植物(旱金莲、一品红、菊花、番茄、小白菜和羽叶甘蓝)的选择性有显著差异,其种群数量为旱金莲和番茄显著多于小白菜、一品红和菊花,羽叶甘蓝显著少于其它5种植物;不同的虫态之间排序有小变动;温室白粉虱在番茄植株上部的垂直分布表现为卵和成虫在第3叶居多,若虫在第5叶居多,伪蛹在第9叶居多。     

微小花蝽对温室白粉虱的捕食作用

研究微小花蝽Orius minutus(L.)对温室白粉虱Trialeurodes vaporariorum(Westwood)的捕食作用。结果表明,微小花蝽成虫对温室白粉虱各虫态的功能反应呈HollingⅡ型。微小花蝽成虫对温室白粉虱卵、1龄和2龄混合若虫及其3龄若虫的理论最大捕食量分别为123,74和52头/d。微小花蝽成虫对温室白粉虱卵的捕食效应随捕食者个体间干扰作用的增加而下降,符合Hassel-Varley方程,捕食作用率(E)随着微小花蝽数(P)增加而呈幂指数下降,模拟模型E=0.1021P-0.3189,干扰系数为0.3189。在15～40℃的温度范围内,随着温度的升高微小花蝽成虫对温室白粉虱卵的寻找效率提高,最高达1.1990,处置时间缩短,最低达到0.0035d。     

Host race formation inTetranychus urticae: genetic differentiation, host plant preference, and mate choice in a tomato and a cucumber strain

The two-spotted spider mite,Tetranychus urticae Koch, occurs in two colour forms in greenhouses in the Netherlands: a red form on tomato and a green form on cucumber. The evolutionary status of these strains was analysed by studying genetic differentiation, host plant preference, and mate choice. Males of the tomato strain preferred the female (30 h-old) teleiochrysales from the same strain to those of the cucumber strain, independent of the host plants (tomato, cucumber, bean) on which the teleiochrysales were placed. In contrast, males of the cucumber strain were not selective. In a Y-tube olfactometer, females of the cucumber strain were not responsive to host plant volatiles alone. However, in two-choice disc experiments, where females were exposed to both volatile and contact cues, they settled on cucumber leaves in preference to tomato leaves. Females of the tomato strain preferred the odour of tomato leaves and settled on tomato leaves in preference to cucumber leaves. These experimental results provide the first evidence for (1) host-plant independent mate selection in male spider mites and (2) olfactory discrimination between host plants in female spider mites. Electrophoretic analysis showed much genetic differentiation at the phosphoglucose isomerase locus. The cucumber strain showed large variation with 5 alleles, whereas the tomato strain was fixed for the most common allele of the cucumber strain. The results suggest that the two strains represent host races. We hypothesize that the tomato strain has originated from the cucumber strain because (1) tomato represents a more hostile host plant to spider mites (due to toxic compounds and glandular hairs) and (2) the tomato strain is genetically impoverished suggesting that it passed through one or more bottlenecks.     

Variability in susceptibility among cucumber and tomato strains of Tetranychus urticae Koch to 2-tridecanone from tomato trichomes: effects of host plant shift

The effects of secondary plant compounds on different host races/strains of a herbivorous arthropod are not easy to interpret based on dose–response tests alone. This difficulty arises because the responses in a population to a given dose are dictated not only by genetic factors, but also by factors such as feeding history, age and plant. To discriminate between these possibilities different strains of a herbivorous mite (Tetranychus urticae Koch) were exposed to one relevant toxin from glandular hairs on tomato (the methyl ketone, 2-tridecanone) and these strains had a known feeding history on either or both of two host plants (tomato and cucumber). It was hypothesized that tomato is a relatively hostile host plant to spider mites partly due to methyl ketones from glandular hairs and that consequently there will be stronger selection on the tomato strains than on the cucumber strains. However, the expected differences between the tomato and cucumber strains did not show up; three spider mite strains collected from tomato and two strains collected from cucumber appeared to be equally susceptible to 2-tridecanone. This unexpected result cannot result from selection for resistance to 2-tridecanone, but it may be the consequence of cross-resistance to other ketones in cucumber or the bio-accumulation (i.e. metabolic load) of 2-tridecanone prior to the toxicity test. To test this hypothesis, one of the tomato strains was released on cucumber for different time intervals and one of the cucumber strains on tomato. It was found that the resistance of the tomato strain to 2-tridecanone increased 6 months after transfer to cucumber. This increased resistance cannot be the result of selection because 2-tridecanone is absent from cucumber. Hence, it may be due either to selection for resistance to another ketone in cucumber, possibly leading to cross-resistance, or to the absence of 2-tridecanone bioaccumulation on cucumber. Transfer of the cucumber strain from cucumber to tomato also increased the resistance to 2-tridecanone. As this was accompanied by high mortality directly after the transfer, selection for resistance may have played a role. Alternatively, the increased resistance may be due to induction of resistance to secondary plant compounds of tomato, including 2-tridecanone. In conclusion, experiments on host plant transfer show that the tomato strain and the cucumber strain are not equal in their resistance to 2-tridecanone.     

Effects of host plant on life‐history traits in the polyphagous spider mite Tetranychus urticae

Studying antagonistic coevolution between host plants and herbivores is particularly relevant for polyphagous species that can experience a great diversity of host plants with a large range of defenses. Here, we performed experimental evolution with the polyphagous spider mite Tetranychus urticae to detect how mites can exploit host plants. We thus compared on a same host the performance of replicated populations from an ancestral one reared for hundreds of generations on cucumber plants that were shifted to either tomato or cucumber plants. We controlled for maternal effects by rearing females from all replicated populations on either tomato or cucumber leaves, crossing this factor with the host plant in a factorial design. About 24 generations after the host shift and for all individual mites, we measured the following fitness components on tomato leaf fragments: survival at all stages, acceptance of the host plant by juvenile and adult mites, longevity, and female fecundity. The host plant on which mite populations had evolved did not affect the performance of the mites, but only affected their sex ratio. Females that lived on tomato plants for circa 24 generations produced a higher proportion of daughters than did females that lived on cucumber plants. In contrast, maternal effects influenced juvenile survival, acceptance of the host plant by adult mites and female fecundity. Independently of the host plant species on which their population had evolved, females reared on the tomato maternal environment produced offspring that survived better on tomato as juveniles, but accepted less this host plant as adults and had a lower fecundity than did females reared on the cucumber maternal environment. We also found that temporal blocks affected mite dispersal and both female longevity and fecundity. Taken together, our results show that the host plant species can affect critical parameters of population dynamics, and most importantly that maternal and environmental conditions can facilitate colonization and exploitation of a novel host in the polyphagous T. urticae, by affecting dispersal behavior (host acceptance) and female fecundity.     

Functional response of Nesidiocoris tenuis (Hemiptera: Miridae) to Trialeurodes vaporariorum (Hemiptera: Aleyrodidae): effect of different host plants

The influence of three host plants, namely cucumber, tomato and eggplant, on functional response of male, virgin and mated female predatory bug Nesidiocoris tenuis was investigated on different densities of Trialeurodes vaporariorum nymphs. The 24-h experiment conducted at laboratory conditions revealed that N. tenuis exhibited a type II functional response to T. vaporariorum on host plants. There were no significant differences between attack rates, as well as handling times estimated for each adult stage of the predator between host plants. However, on each host plant, the handling time estimated for the mated female in comparison with two other adult stages had lower values (0.7952, 0.6827 and 0.8884?h^?1 on cucumber, tomato and eggplant, respectively). Handling time estimated for the mated female on cucumber was significantly lower than that estimated for the male predator. The highest maximum handling rate (T/T_h) was estimated for the mated female followed by the virgin female and male on all host plants. For three adult stages of the predator, the highest value of this parameter was determined on tomato followed by cucumber and eggplant. Unlike virgin and mated females, the host plant significantly affected prey consumption by the male. Prey consumed by mated females was higher than those obtained for two other adult stages of the predator on each host plant. The difference in trichome density between three host plants may be responsible for the obtained results. These results revealed that N. tenuis is more effective in the biological control of T. vaporariorum on tomato in comparison with cucumber and eggplant.     

Feeding Experience of Bemisia tabaci (Hemiptera: Aleyrodidae) Affects Their Performance on Different Host Plants

The sweetpotato whitefly, Bemisia tabaci biotype B is extremely polyphagous with >600 species of host plants. We hypothesized that previous experience of the whitefly on a given host plant affects their host selection and performance on the plants without previous experience. We investigated the host selection for feeding and oviposition of adults and development and survival of immatures of three host-plant-experienced populations of B. tabaci, namely Bemisia-eggplant, Bemisia-tomato and Bemisia-cucumber, on their experienced host plant and each of the three other plant species (eggplant, tomato, cucumber and pepper) without previous experience. We found that the influence of previous experience of the whiteflies varied among the populations. All populations refused pepper for feeding and oviposition, whereas the Bemisia-cucumber and the Bemisia-eggplant strongly preferred cucumber. Bemisia-tomato did not show strong preference to any of the three host palnts. Development time from egg to adult eclosion varied among the populations, being shortest on eggplant, longest on pepper, and intermediate on tomato and cucumber except for the Bemisia-cucumber developed similarly on tomato and pepper. The survivorship from egg to adult eclosion of all populations was highest on eggplant (80-98%), lowest on pepper (0-20%), and intermediate on tomato and cucumber. In conclusion, the effects of previous experience of whiteflies on host selection for feeding and oviposition, development, and survivorship varied depending on host plants, and host plants play a stronger role than previous experience. Preference of feeding and oviposition by adults may not accurately reflect host suitability of immatures. These results provided important information for understanding whitefly population dynamics and dispersal among different crop systems.     

Editorial note

Generalist herbivores can face many challenges when choosing their host plant. This can be particularly difficult if their choice and performance are affected by host experience. Greenhouse whitefly, Trialeurodes vaporariorum Westwood (Hemiptera: Aleyrodidae), is an invasive generalist herbivore, which has established in year‐round greenhouses at northern latitudes where it cannot overwinter outdoors. It mainly uses crops such as cucumber (Cucumis sativus L.), tomato (Solanum lycopersicum L.), and ornamentals as host plants. However, every summer the insect escapes greenhouses and is exposed to natural vegetation. We evaluated the performance of T. vaporariorum on diverse vegetation outside greenhouses after prolonged experience of greenhouse crops. First, we surveyed the vegetation near infested greenhouses. Development success of the insect differed among wild hosts. We identified five new hosts among 12 plant species that bore pupae and were thus considered suitable as the insect's host plants. Members of the Urticaceae and Onagraceae were the most preferred and frequently inhabited by all insect life stages. The highest abundance of insects occurred in plots with low plant species richness, independent of plant family in these habitats. We then studied experimentally the impact of 1 year of preconditioning to one of three common greenhouse crops, cucumber, tomato, or poinsettia (Euphorbia pulcherrima Willd. ex Klotzsch), on the performance of the preconditioned adults and their progeny on four wild plants. Adults from tomato and poinsettia preferred the novel host species over the species to which they were preconditioned. The whitefly population preconditioned to cucumber was the most fecund on all offered hosts. We conclude that generalist herbivores can have large variation in performance, despite polyphagy, on novel hosts as shown by the variable abundance of T. vaporariorum pupae among outdoor hosts. Furthermore, performance of whiteflies on natural vegetation was affected by experience on greenhouse crops. Based on our observations, we provide insights and recommendations for pest management.     

Probing and feeding characteristics of the greenhouse whitefly in association with host-plant acceptance and whitefly strains

Host-plant and whitefly strain effects and their interactions on the probing and sap feeding of the greenhouse whitefly, Trialeurodes vaporariorum (Westwood), have been investigated in this study using the DC-EPG (Electrical Penetration Graph) technique. Whiteflies generally displayed fewer but longer probes on highly acceptable cucumber than on less acceptable tomato. Both whitefly strains, the T(omato)-strain and the C(ucumber)-strain, showed a significantly lower number of phloem phases on cucumber than on tomato. However, the duration of total phloem phases achieved by either of the whitefly strains on these two host plants was not significantly different. These data indicate that a more continuous phloem feeding has occurred on cucumber plants. Indeed, the percentage of phloem feeding time after the first sustained phloem phase (longer than 15 min) was higher on cucumber for the C-strain whiteflies. When comparing these two whitefly strains, the T-strain whiteflies probed less frequently but longer than the C-strain whiteflies did on both host plants. Also, the T-strain whiteflies displayed a longer duration of total phloem phases on tomato. An interaction between the whitefly strain and plant effects was detected on a parameter, which showed that whiteflies probed significantly longer before reaching the first phloem phase on the host plants that had been previously experienced. In conclusion, both plant species and whitefly strains affect whitefly's probing and feeding behaviour, though plant effects are much stronger.     

Effect of host plant on susceptibility of whitefly Bemisia tabaci (Homoptera: Aleyrodidae) to the entomopathogenic fungus Beauveria bassiana (Ascomycota: Hypocreales)

We determined host plant effect on susceptibility of whitefly Bemisia tabaci to the entomopathogenic fungus Beauveria bassiana under controlled conditions. Insects were reared on cucumber, eggplant, tomato or cabbage. Fungal suspensions of 1×10⁴, 10⁵, 10⁶, 10⁷ and 10⁸ conidia/mL were applied on second-instar nymphs. Nymphal survival significantly differed among different host plant species on which the nymphs were reared. Ten days after inoculation with 1×10⁸ conidia/mL, percent survival was 4.2±0.7, 9.6±0.4, 13.4±0.8, and 24.3±0.9% on cucumber, eggplant, tomato and cabbage, respectively. Average survival times of nymphs were also significantly influenced by host plant species. After inoculation with 1×10⁸ conidia/mL, survival times were 4.8±0.15, 6.0±0.11, 5.7±0.13, and 6.2±0.08 days for nymphs reared on cucumber, eggplant, tomato, and cabbage, respectively. Virulence also differed depending on host plant species; 10 days after inoculation, LC₅₀ values were 4.6×10⁴, 1.6×10⁵, 4.2×10⁵ and 2.1×10⁶ conidia/mL on cucumber, eggplant, tomato and cabbage, respectively. Nymphs on cucumber showed highest susceptibility.     

A single nucleotide change within a plant virus satellite RNA alters the host specificity of disease induction

Some RNA plant viruses contain satellite RNAs which are dependent upon their associated virus for replication and encapsidation. Some cucumber mosaic virus satellite RNAs induce chlorosis on any of several host plants, including either tobacco or tomato. The exchange of sequence domains between cDNA clones of chlorosis-inducing and non-pathogenic satellite RNAs delimited the chlorosis domain for both tobacco and tomato plants to the same region. Site-directed mutagenesis of one nucleotide (149) within this domain changed the host plant specificity for a chlorotic response to satellite RNA infection from tomato to tobacco. Within the chlorosis domain, three conserved nucleotides are either deleted or altered in all satellite RNAs that do not induce chlorosis. Deletion of one of these nucleotides (153) did not affect satellite RNA replication but rendered it non-pathogenic. Thus, two single nucleotides have been identified which play central roles in those interactions between the virus, its satellite RNA and the host plant, and together result in a specific disease state.     

甜菜夜蛾对不同寄主植物的产卵和取食选择

为了探讨甜菜夜蛾Spodoptera exigua对不同寄主植物的产卵选择及成虫产卵选择与幼虫取食选择间的关联度, 本研究选取玉米、豇豆、甘蓝、黄瓜、棉花、辣椒和番茄7种植物进行了选择性和非选择性实验研究, 并采用Y型嗅觉仪测定了成虫对其中3种寄主植物及其挥发物抽提物的趋性。结果表明：在田间非选择性实验中, 甜菜夜蛾在不同寄主植物上的落卵量依次为：玉米>辣椒>棉花>黄瓜、豇豆、番茄>甘蓝。Y型嗅觉仪的行为测定表明, 雌成虫对玉米及其挥发物抽提物的趋性最强, 黄瓜次之, 对甘蓝的趋性最弱, 这与雌虫的产卵选择性一致。不同龄期甜菜夜蛾幼虫对寄主植物的取食选择性有所不同, 且随观测时间的延长有所改变;低龄幼虫对豇豆、玉米和黄瓜的选择性较强, 对甘蓝、番茄、辣椒和棉花的取食选择性则较弱, 高龄幼虫对辣椒也具有较强的选择性;5龄幼虫对寄主植物的选择性不如低龄幼虫明显。结果显示, 甜菜夜蛾对不同寄主植物的产卵选择性显著不同, 植物抽提物在雌成虫的产卵选择中具有重要作用, 甜菜夜蛾对寄主植物的产卵选择性和幼虫取食选择性并不一致。