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1.
A. R. Horowitz 《Phytoparasitica》1993,21(4):281-291
Populations of the sweetpotato whitefly,Bemisia tabaci (Gennadius), were sampled late in the cotton-growing seasons of 1990, 1991 and 1992, in commercial ‘Acala’ cotton fields in southwestern Israel. In mid summer, when populations ofB. tabaci started to build up, cotton fields were commercially treated with a single application of an IGR (insect growth regulator). The experimental plots were then treated in September with conventional adulticides or with the novel insecticides buprofezin and pyriproxyfen (IGR), and diafenthiuron (a thiourea derivative). The effects of the insecticides onB. tabaci larval and adult populations, and the amount of damage to the cotton lint, were recorded. Untreated populations of larvae and pupae ofB. tabaci in the three end-of-season studies, had the tendency to build up toward the defoliation treatment. However, the level of theB. tabaci populations observed in the experimental fields and the short period of exposure of the open cotton bolls to the whiteflies, did not result in lint damage, probably because the whitefly numbers had been reduced considerably after the defoliation treatment. At the end of the 1991 and 1992 cotton seasons, a high level of parasitism, ranging between 50% and 80%, was recorded. The shift in chemical applications toward the novel IGRs during the season, along with the reduction in insecticide use in general, probably contributed to the propagation of parasitoids, thereby improving whitefly control. 相似文献
2.
The morphological basis of resistance to the whiteflyBemisia tabaci Genn. (Aleyrodidae: Hemiptera) was studied. The plant characters examined were leaf area, thickness of leaf lamina, hair
density, hair length, angle of insertion of leaf hair, and density of gossypol glands. Hair density and leaf thickness were
positively correlated with the population ofB. tabaci, and a positive correlation was obtained between the adult whitefly population and gossypol glands on stem internodes. Cotton
genotype USA-22 (sparsely hairy) was found to be more tolerant toB. tabaci than was genotype USA-13 (velvety hairy). The use of thinner and glabrous leaved cotton varieties is suggested to minimize
the whitefly menace in cotton. 相似文献
3.
Bemisia tabaci (Gennadius), the sweetpotato whitefly, has only one known entomophthoralean pathogen,Erynia radicans (Entomophthoraceae). Two new pathogens have been isolated recently from a glasshouse population of this pest:Conidiobolus coronatus and another, undescribed species ofConidiobolus (Entomophthorales: Ancylistaceae). Artificial inoculation experiments revealed that eggs ofB. tabaci are practically immune to infection by either species. Second-instar larvae are highly resistant, only high doses of conidia
causing between <1% and 4.6% mortality. Adults were found to be much more susceptible. Doses of 60 conidia/mm2 ofC. coronatus caused average mortalities ofca 95%. The maximum mortality of adults caused byConidiobolus sp. was much lower,ca 30%, at a dose of 210 conidia/mm2. The incubation period (inoculation to death) for both species, under our experimental conditions, is very short: 18–24 h
forC. coronatus and 30 h forConidiobolus sp. Both fungi produced loricoconidia (conidia metamorphosed into resting spores) on cotton leaves and other dry surfaces.
This ability allowedConidiobolus sp. to remain viable for 17–21 days on cotton leaves, in glasshouse conditions and in the absence of hosts, whileC. coronatus persisted for 10–14 days. 相似文献
4.
Pyriproxyfen, a novel juvenile hormone mimic, is a potent suppressor of embryogenesis and adult formation of the sweetpotato whitefly, Bemisia tabaci (Gennadius), and the greenhouse whitefly, Trialeurodes vaporariorum (Westwood). Dipping of cotton or tomato seedlings infested with 0 to 1-day-old eggs in 0.1 mg litre?1 resulted in over 90% suppression of egg hatch of both B. tabaci and T. vaporariorum. Older eggs were affected to a lesser extent. Exposure of whitefly females to cotton or tomato seedlings treated with pyriproxyfen resulted in oviposition of non-viable eggs. The LC90 values for egg viability of B. tabaci and T. vaporariorum exposed to treated plants were 0.05 and 0.2 mg litre?1, respectively. Treatment of whitefly larvae with 0.04–5 mg litre?1 resulted in normal development until the pupal stage; however, adult emergence was totally suppressed. Second instars of B. tabaci exposed to 5 mg litre?1 pyriproxyfen, excreted honeydew at a level similar to the control level until the fourth instar (pupation), after which a strong reduction was observed. Inhibition of egg-hatch on the lower surface of cotton leaves was observed when their upper surface was treated with 1–25 mg litre?1, indicating a pronounced translaminar effect. These findings indicate that pyriproxyfen is an efficient control agent of both B. tabaci and T. vaporariorum. The compound has been used successfully for controlling whiteflies in Israeli cotton fields since 1991. Adults of B. tabaci collected from a rose greenhouse and from adjacent cotton fields were monitored during 1991–1993 for their susceptibility to pyriproxyfen. A high level of resistance was recorded in whiteflies collected from a greenhouse after three successive applications of pyriproxyfen. Based on LC50 values, the resistance ratio for egg-hatch suppression was 554-fold and, for adult emergence failure, 10-fold. However, a single treatment of pyriproxyfen in cotton fields during the summer season (according to an insecticide resistance management (IRM) strategy) did not alter appreciably the susceptibility of B. tabaci to this compound. In order to prevent development of resistance, an attempt should be made to restrict its use to one treatment per crop season applied during the peak activity of the pest. Pyriproxyfen can be alternated with other novel compounds such as buprofezin and diafenthiuron for controlling whiteflies in cotton, vegetables and ornamentals as part of integrated pest management (IPM) and IRM strategies. In pyriproxyfen- or buprofezin-resistant strains of B. tabaci or T. vaporariorum, no appreciable cross-resistance was observed among pyriproxyfen, buprofezin and diafenthiuron. 相似文献
5.
Green lacewings, includingChrysoperla rufilabris (Burmeister) andCeraeochrysa cubana (Hagen), are predators of small, soft-bodied insects including whiteflies. The silverleaf whitefly,Bemisia argentifolii Bellows & Perring [formerlyB. tabaci (Gennadius) strain B], is an important pest of agronomic, vegetable and ornamental crops. Practical use of these lacewings
as biological control agents would be facilitated by better understanding of their responses to both biorational (selective)
and broad-spectrum insecticides. The topical and residual toxicity of azadirachtin (Azatin-ECTM), insecticidal soap (M-PedeTM), paraffinic oil (Sunspray Ultra-Fine Spray OilTM) and the pyrethroid bifenthrin (BrigadeTM) to eggs, larvae and adults of the lacewings were studied in the laboratory. Larvae ofC. cubana were much more tolerant to residues of bifenthrin than wasC. rufilabris and were somewhat more tolerant to topically applied soap. At normal field concentrations, azadirachtin (0.005%, by wt a.i.),
paraffinic oil (1.0% by volume) and soap (1.0% by volume) were not toxic to larvae or adults of either species either topically
or residually. Oil was toxic topically to eggs but azadirachtin and soap were not. Bifenthrin was toxic topically and residually
to larvae and adults but was not so toxic to eggs as was oil. Thus, selectivity of all materials tested was relative to lacewing
species and lifestage. The relative tolerance to insecticide residues exhibited byC. cubana larvae may be related to its trash-carrying habit, suggesting that use of trash-carrying chrysopids in place of non-trash
carriers for augmentative biological control would increase options for non-disruptive chemical intervention when necessary. 相似文献
6.
S-31183 was assayed against preimaginal stages of the tobacco whitefly,Bemisia tabaci (Genn.), and eggs of the Egyptian cotton leafworm,Spodoptera littoralis (Boisd.). The compound was found to be an ovicide forB. tabaci eggs in both preinfestation and postinfestation treatments. FreshS. littoralis eggs were very susceptible to the compound at 0.05 ppm a.i., response was much poorer with 1-2-day-old eggs and 2-3-day-old
eggs were not affected even by 100 ppm.
Publication of the Agricultural Research Organization. No. 2271-E, 1988 series. 相似文献
7.
传播木尔坦棉花曲叶病毒的烟粉虱隐种鉴定 总被引：1，自引：1，他引：0
为明确广东地区传播木尔坦棉花曲叶病毒(Cotton leaf curl Multan virus,CLCu Mu V)的烟粉虱隐种,采用分子鉴定、烟粉虱传毒试验与分子检测的方法,对传播CLCu Mu V的烟粉虱隐种进行了鉴定。结果表明:在广东棉花、红麻和黄秋葵曲叶病发生的田间,2014年采集的30头烟粉虱mt COI与Asia II 7隐种序列同源性为98.3%~99.6%,2015年采集的10头烟粉虱中,8头烟粉虱mt COI与MEAM1隐种序列同源性为99.2%~99.5%,2头烟粉虱mt COI与Asia II 7隐种序列同源性为99.8%~99.9%,说明烟粉虱种群包括入侵隐种MEAM1和土著隐种Asia II 7。在利用烟粉虱人工传毒试验中,MEAM1、Asia II 7和Asia II 1这3个隐种均可在棉花曲叶病株上饲毒获得CLCu Mu V及β卫星分子;除MEAM1隐种外,Asia II 7、Asia II 1隐种可传播CLCu Mu V,侵染红麻及黄秋葵植株引起曲叶病,前者传毒效率分别为50%和100%;而后者为33%和100%。以上3个烟粉虱隐种传毒接种棉花未见成功。 相似文献
8.
Plant resistance has become an important component of integrated pest management (IPM) for management of whitefly, Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae), an important pest of cotton in India. The present studies were undertaken to standardize
the plant stage and identify resistant cotton genotypes against whitefly. Nine plant stages of F846, a susceptible cotton
genotype, were exposed to whitefly for 25 days under no-choice conditions. The population buildup (eggs, nymphs, pupae and
adults) was recorded. The 12-, 14- and 16-leaf stages were suitable for plant resistance studies against whitefly, and the
14-leaf stage was taken for further studies. Ten cotton genotypes of Gossypium hirsutum and two of G. arboreum were covered with split cages in which five pairs of B. tabaci (F1) were released. The population buildup was recorded to categorize genotypes as resistant, moderately resistant, moderately
susceptible or susceptible. The experiment was repeated with F2 and F3 generation whiteflies. Based on overall average score of three experiments, LD694 was rated as resistant; LK861, Supriya,
RS2013, CNH911 and PA183 as moderately resistant; IS-376/4/1/20/72, NHH44, TxMaroon2-78, Bt 6304 and RS2098 as moderately susceptible; and F846 as susceptible. LD694 was found to be resistant in three consecutive
generations of whitefly. 相似文献
9.
Phylogenetic analysis using ITS1 and CO1 nucleotide sequences has revealed six major races ofBemisia tabaci in the world, including three major indigenous races in the Asia-Pacific region,viz., B. tabaci (Asia),B. tabaci (Bali) andB. tabaci (Australia), but the status of a large collection of genotypes in this region remains unresolved. The ITS1 sequences of representative
whitefly samples collected from around China were determined in this study. These sequences and other homologous sequences
retrieved from GenBank were then used to conduct a phylogenetic analysis. The results demonstrated that the whiteflies collected
in China were split genetically into four groups, where at least five genetic races were revealed,i.e., B biotype (SDLe, XJEp, XJAt, HNNt, BJIb, GDEp, XJGh, GDHrs, XJSm and SHEp), Bali group (ZJGh), M biotype (Hainan1), G biotype
(GXCm) and Asian H/K group (FJIb, GDCv), although the Asian H/K group with low bootstrap score remains unresolved. Of all
genetic races, the B biotype is the most extensively distributed. In the dendogram, the J biotype, L biotype and Q biotype
cluster together and form a sister clade to the B biotype. The data indicate that extensive migration ofB. tabaci has taken place in Asian countries. The populations ZJGh, FJIb, GDCv, GXCm and Hainanl collected in China might have originated
there, but the possibility that they were introduced from elsewhere cannot be excluded at this point. Using PyR from Israel
as a reference Q biotype, the random amplified polymorphic DNA banding patterns of SDLe, XJEp, XJAt and HNNt were shown to
be consistent with that of the Q biotype, which indicated that the four local whitefly populations identified as the B biotype
based on ITS1 sequences were closely related to the Q biotype.
http//www.phytoparasitica.org posting Sept. 12, 2006. 相似文献
10.
Diafenthiuron (CGA 106 ’630), a thiourea, was sprayed prior to a 48-h infestation by adult females of the sweetpotato whiteflyBemisia tabaci Gennadius, on cotton seedlings under greenhouse conditions; it subsequently suppressed strongly progeny formation of the
whitefly, resulting in approximately 50% progeny formation relative to control at 5 mg a.i./l. When the different development
stages were separately sprayed directly, the larval stage was the most susceptible, resulting in 50% and 90% mortality of
2nd instars at concentrations of 6.5 and 49.2 mg a.i./l, whereas the LC50 values of adults and pupae were 23 and 45 mg a.i./l,
respectively. A mild (30–35%) reduction of egg hatch was obtained at a range of 5–125 mg a.i./l. Thus the potency of diafenthiuron
against various stages was in the order larvae > adults > pupae > eggs. Diafenthiuron exhibited a low vapor phase toxicity
and had no translaminar effect when tested on first instars ofB. tabaci. The high potency of diafenthiuron against whiteflies described herein, against aphids and mites, as stated in the literature,
and against some lepidopterous pests, render this compound an important insect control agent for pests of cotton and other
crops. 相似文献
11.
为了解烟粉虱的寄生蜂海氏桨角蚜小蜂的特征、发生规律,观察了其新疆种群的形态特征,于2012年在田间比较了该寄生蜂在棉花、甜瓜、茄子和辣椒上与烟粉虱的时空动态。结果表明,在辣椒上海氏桨角蚜小蜂成虫发生期最早,7月5日始见成虫;在4种作物上海氏桨角蚜小蜂和烟粉虱成虫分别在茄子和甜瓜上的发生数量最多,单叶虫口数量最高分别为16.12和66.47头;除辣椒外,在其它作物上成蜂的发生期比烟粉虱成虫约晚20 d,而被寄生的烟粉虱若虫与未被寄生的若虫时空动态较吻合;烟粉虱和海氏桨角蚜小蜂在植株上的成虫数量均表现出明显的上部中部下部的分布特征。研究表明,与烟粉虱比较,海氏桨角蚜小蜂新疆种群的时空动态表现出明显的滞后性和跟随效应,且其可能对寄主植物有一定的选择性。 相似文献
12.
Thomas A Houndété Guillaume K Kétoh Omer SA Hema Thierry Brévault Isabelle A Glitho Thibaud Martin 《Pest management science》2010,66(11):1181-1185
BACKGROUND: The tobacco whitefly, Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae), has developed a high degree of resistance to several chemical classes of insecticides throughout the world. To evaluate the resistance status in West Africa, eight insecticides from different chemical families were tested using the leaf‐dip method on four field populations collected from cotton in Benin, Togo and Burkina Faso. RESULTS: Some field populations showed a significant loss of susceptibility to pyrethroids such as deltamethrin [resistance ratio (RR) 3–5] and bifenthrin (RR 4–36), to organophosphates (OPs) such as dimethoate (RR 8–15) and chlorpyrifos (RR 5–7) and to neonicotinoids such as acetamiprid (RR 7–8) and thiamethoxam (RR 3–7). Bemisia tabaci was also resistant to pymetrozine (RR 3–18) and to endosulfan (RR 14–30). CONCLUSION: The resistance of B. tabaci to pyrethroids and OPs is certainly due to their systematic use in cotton treatments for more than 30 years. Acetamiprid has been recently introduced for the control of whiteflies. Unfortunately, B. tabaci populations from Burkina Faso seem to be already resistant. Because cross‐resistance between these compounds has never been observed elsewhere, resistance to neonicotinoids could be due to the presence of an invasive B. tabaci biotype recently detected in the region. Copyright © 2010 Society of Chemical Industry 相似文献
13.
14.
The hemocytes of the American bollwormHelicoverpa armigera (Hübner) were studied in the last instar larvae by phase contrast microscopy to investigate the differences among 14 populations,
collected from ten locations, spread over a distance of approximately 3000 km in six different states of India. The cluster
analysis of differential hemocytes showed as many as 11 clusters of populations at 5% and six clusters at 10% homogeneity
level. The cluster analysis of hemocytes of seven populations from cotton crops showed five and three clusters at 5% and 10%
homogeneity levels, respectively. Diversity of hemocytes of four populations from chickpea was wider than that from cotton.
The differences in hemocytes of various populations may be due to space, time, host plant, insecticide use, other agroecological
conditions, and insect genetic variabilityper se. The field populations ofH. armigera heavily treated with insecticides appeared to contain more spherulocytes at the expense of plasmatocytes and granulocytes.
The treatment of 6-day-old larvae ofH. armigera with cypermethrin decreased plasmatocytes and granulocytes, and increased prohemocytes and spherulocytes in the hemolymph
of last instar larvae. Thus, differential hemocyte counts may serve as an indicator of insecticide exposure and the diversity
of insect populations.
http://www.phytoparasitica.org posting Dec. 20, 2004. 相似文献
15.
福建省烟粉虱不同地理种群遗传结构特征 总被引：4，自引：3，他引：1
为明确福建省烟粉虱种群遗传结构特征,基于福建省烟粉虱不同地理种群中40个代表性的线粒体COI基因序列,分析了种群遗传多样性、遗传分化及分子变异情况,并构建了单倍型系统发育树与网络图。结果显示:在590 bp长度的mt COI基因序列中有效位点558个,其中187个核苷酸位点存在变异;序列核苷酸中A、T、C、G含量分别为42.32%、24.36%、20.25%、13.06%,其中A+T的含量为66.68%,表现出明显的A+T偏向性;共检测出11个单倍型,其中Hap3、4、7、9、11为特殊单倍型;种群多样性指数为0.838,核苷酸多样性指数为0.093,表明遗传多样性水平较高;AMOVA分析表明种群遗传变异主要来自种群内,总种群遗传分化系数仅为0.027,种群遗传分化较低。表明福建烟粉虱种群基因交流未受地理距离明显影响,种群遗传分化不显著。 相似文献
16.
BACKGROUND
Bemisia tabaci is a globally significant agricultural pest including in Australia, where it exhibits resistance to numerous insecticides. With a recent label change, buprofezin (group 16), is now used for whitefly management in Australia. This study investigated resistance to pyriproxyfen (group 7C), spirotetramat (group 23) and buprofezin using bioassays and available molecular markers.RESULTS
Bioassay and selection testing of B. tabaci populations detected resistance to pyriproxyfen with resistance ratios ranging from 4.1 to 56. Resistance to spirotetramat was detected using bioassay, selection testing and sequencing techniques. In populations collected from cotton, the A2083V mutation was detected in three populations of 85 tested, at frequencies ≤4.1%, whereas in limited surveillance of populations from an intensive horticultural region the frequency was ≥75.8%. The baseline susceptibility of B. tabaci to buprofezin was determined from populations tested from 2019 to 2020, in which LC50 values ranged from 0.61 to 10.75 mg L−1. From the bioassay data, a discriminating dose of 200 mg L−1 was developed. Recent surveillance of 16 populations detected no evidence of resistance with 100% mortality recorded at doses ≤32 mg L−1. A cross-resistance study found no conclusive evidence of resistance to buprofezin in populations with high resistance to pyriproxyfen or spirotetramat.CONCLUSIONS
In Australian cotton, B. tabaci pest management is challenged by ongoing resistance to pyriproxyfen, while resistance to spirotetramat is an emerging issue. The addition of buprofezin provides a new mode-of-action for whitefly pest management, which will strengthen the existing insecticide resistance management strategy. © 2023 Commonwealth of Australia. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. 相似文献17.
为明确天津市烟粉虱Bemisia tabaci隐种的类别及其寄主适应性、传毒能力、携带内共生菌情况和抗药性,采用mt COI酶切法对从武清、西青、蓟州和宁河4个区的番茄、黄瓜及辣椒3种寄主上采集的12个烟粉虱种群进行隐种鉴定,采用PCR检测其携带番茄黄化曲叶病毒（tomato yellow leaf curl virus,TYLCV）和内共生菌情况,并采用浸叶法测定其对4种常用药剂的抗性。结果表明,采集的烟粉虱种群以MED隐种为主,占所有检测个体的93.33%,有3个种群为MED和MEAM1隐种混合发生。所有检测个体中有36.25%的个体携带TYLCV,在6个种群中检测到TYLCV,其中5个种群有超过50%的个体携带TYLCV。在12个种群中共检测到Hamiltonella、立克次氏体Rickettsia、Cardinium和杀雄菌属Arsenophnus共4种内共生菌,携带个体比例分别为90.63%、48.96%、43.75%和8.33%,进一步对内共生菌协同感染情况进行分析,发现有HARC、HRC、HAC、HR、HC和AC共6个协同感染型,感染率分别为4.17%、28.13%、3.... 相似文献
18.
Three experiments were carried out during three consecutive years to evaluate 19 insecticides and 12 tank mixtures of different
groups of insecticides against the whiteflyBemisia tabaci and its predators and parasitoids under field conditions in cotton. In the first experiment, the whitefly population was
lower in treatments with thiacloprid and higher in those with black warrant (a.i. alcohol) and cypermethrin; the number of
predators was higher with Agri-50 and spinosad and lowest with cypermethrin, whereas percent parasitism was higher with thiacloprid
and lower with methamidophos. In the second experiment, the whitefly population was lower in treatments with buprofezin, pyriproxyfen
and diafenthiuron and higher in those with endosulfan, imidacloprid and thiamethoxam; the number of predators was higher with
pyriproxyfen and lower with thiamethoxam, whereas percent parasitism was higher with pyriproxyfen and lower with thiamethoxam.
In the third experiment, the whitefly population was lower in a treatment mixture with buprofezin + fenpropathrin and higher
in that with thiamethoxam + chlorpyrifos; the number of predators was higher with buprofezin + fenpropathrin and lower with
deltamethrin + triazophos and deltamethrin + chlorpyrifos, whereas percent parasitism was higher with the mixture of pyriproxyfen
+ chlorpyrifos and lower in imidacloprid + chlorpyrifos, betacyfluthrin + triazophos, and deltamethrin + triazophos. Effective
use of these insecticides to manage whitefly infestations and to save predators and parasitoids is discussed.
http:www.phytoparasitica.org posting August 7, 2008. 相似文献
19.
为了解甘肃省河西走廊棉区5种常见害虫的田间种群消长动态,明确防治适期并提出以植物源药剂为主的棉花害虫绿色防控技术,于甘肃省敦煌市和瓜州县棉田连续3年采用人工调查和性诱剂诱捕器监测棉蚜Aphis gossypii、棉叶螨、棉蓟马Thrips tabaci、烟粉虱Bemisia tabaci及棉铃虫Helicoverpa armigera的发生动态,同时开展以植物源农药为主的不同类型杀虫剂的田间药效筛选试验,建立科学防控用药技术流程。结果表明,棉蚜全年有6月中旬和7月中下旬2个发生高峰期,建议防治适期为7月上中旬;棉叶螨全年有7月上旬和7月下旬（2017年除外）2个发生高峰期,建议防治适期为6月下旬和7月中旬;烟粉虱全年只有8月中旬至9月中下旬1个高峰期,建议防治适期为8月上中旬;棉蓟马全年只有7月上旬至8月上旬1个高峰期,建议防治适期为7月上旬;棉铃虫1年发生3代,幼虫在7月下旬、9月上旬和9月中旬各有1个发生高峰期,成虫在7月上中旬、8月中下旬和9月中旬各有1个高峰期,建议防治适期应为7月上旬。软皂水剂、藜芦碱、苦参碱、啶虫脒和吡虫啉可用于防控棉蚜,药后14 d防效达76.93%~91.25%;藜芦碱、苦参碱、矿物油、软皂水剂、松油、阿维菌素、阿维·哒螨灵、螺螨酯和硅藻土+有机硅助剂可用于防控棉叶螨,药后10 d防效达72.39%~92.81%;软皂水剂、藜芦碱、印楝素、硅藻土+有机硅助剂、阿维菌素和噻虫嗪可用于防控烟粉虱,药后7 d防效达65.84%~84.29%;除虫菊素、苦参碱、多杀霉素、噻虫嗪和吡虫啉可用于防控棉蓟马,药后14 d防效达72.92%~90.93%。表明在该地区棉田主要害虫防治适期,建立以植物源农药替代传统化学药剂的防控技术,可用于我国河西走廊棉区棉花害虫的绿色防控。 相似文献
20.
The recent upsurgence ofBemisia tabaci (Genn.) as an important insect pest and vector ofTomato yellow leaf curl virus (TYLCV) is directly linked to serious damage to tomato crops grown throughout Japan. The molecular genetic identification
and phylogenetic relationships of 12B. tabaci populations collected from representative locations in Japan were determined based on the mitochondrial cytochrome oxidase
I (mtCOI) sequence. Phylogenetic analysis of the whitefly mtCOI sequence indicated that both the invasive B and Q biotypes
now occur in Japan. The Q biotype was found at four locations: Mihara in Hiroshima, Nishigoshi in Kumamoto, Miyanojo and Okuchi
in Kagoshima prefectures; the remaining eight collections were identified as the B biotype. This is the first report of the
introduction of Q biotype in Japan.
http://www.phytoparasitica.org posting July 21, 2006. 相似文献