松毛虫狭颊寄蝇实验种群生态学研究

松毛虫狭颊寄蝇(Carcelia matsukarehae)是松毛虫重要的寄生天敌之一,在控制松毛虫自然种群增长中起重要的作用.本文在15℃、18℃、22℃、25℃、29℃、32℃6个恒温,相对湿度为70%～85%,光照为12:12(L:D)的条件下研究了松毛虫狭颊寄蝇的生态学特性.结果表明,松毛虫狭颊寄蝇的世代发育起点温度是5.23℃,积温为523.73日·度,成虫寿命在没有补充营养的条件下为1.3～8.06d,喂以30%蜜糖水,寿命可以从9.63d延长到36.42d,成虫产卵的最适温度为23.6℃,每雌最大产量为86粒.种群增长最适温度22～25℃.以近似方法计算22℃和25℃下实验种群繁殖特征生命表参数,在22℃,R₀、T₀、r_c和λ值分别为24.89、37.33、0.086和1.089,在25℃时分别为20.01、32.38、0.09和1.10.22℃时种群最大L_xM_x出现在成虫羽化后第33～38天,25℃时的LxMx最大值出现在成虫羽化后第29～34天.     

引进花角蚜小蜂成虫的寿命和羽化节律

通过室内饲养和连续观察,研究了食物、温度对引进花角蚜小蜂成虫寿命的影响及其羽化的时间节律.结果表明：食物对该寄生蜂成虫寿命有极显著影响,喂食20％蜂蜜或20％蜂蜜＋新鲜松针可将雌虫寿命从不喂食的1.5 d延长到14.8 d和17.3 d,将雄虫寿命从不喂食的1.5 d延长到11.3 d和12.3 d.喂食20％蜂蜜条件下,温度也表现出极显著影响,23 ℃和26 ℃下雌、雄成虫的寿命均明显较长,32 ℃下均最短,相同温度下雌虫的寿命显著长于雄虫.日周期中,雌虫主要在11:00-15:00羽化,18:00以后基本不羽化;雄虫主要在9:00-12:00羽化,17:00以后基本不羽化.在花角蚜小蜂的主要羽化期7-9月,7月羽化量最大 ,此后8、9月呈波浪式递减;单日羽化的成虫中,雌虫大多占80％以上,雄虫则长期在一个较低水平波动.对比试验发现,花角蚜小蜂在收蜂棚中的出蜂量比在收蜂箱中更大.花角蚜小蜂在羽化前积累的能量十分有限,人工放蜂前提供必要的营养补充将有助于提高生物防治效果.福建和广东夏季的高温、花角蚜小蜂雌成虫和松突圆蚧雌成蚧虫口高峰期不吻合、极高的雌性比例等是影响该寄生蜂种群稳定的潜在因素.收蜂棚有利于大量收集花角蚜小蜂,适合在生产上应用.     

人工扩繁代异色瓢虫卵和成虫最适冷藏条件的探讨

探讨了人工扩繁异色瓢虫时卵和成虫的最适冷藏条件。卵的最适保存温度是 1 0℃ ,冷藏 1 5d内孵化率平均在 60 %以上。成虫的最适保存温度是 1 0℃ ,如将刚羽化的成虫直接在该温度下冷藏 ,冷藏 40d时存活率能保持在 5 0 %左右 ;如将刚羽化成虫先在 1 5℃、0L∶2 4D条件下处理 1 6d,然后置于 1 0℃下冷藏 ,经冷藏 70d后存活率接近 1 0 0 % ,冷藏 90d后存活率仍高于 70 %。表明经一定条件下预处理后再冷藏成虫能保持较高的存活率和较长的存活期 ,可满足人工扩繁时对成虫的冷藏要求。     

温度对家蝇广州种群成虫繁殖力及卵黄蛋白发生的影响

研究了不同温度对家蝇(Musca domestica L.)广州种群繁殖力及卵黄蛋白发生的影响,旨在为利用家蝇广州种群大规模高效养殖提供技术支持。选同一天刚羽化的健康雌、雄蝇,分别置于20、24、28、32和36℃环境下单对饲养,重复6次。每天测定成虫日产卵量、卵孵化率及死亡数等,统计家蝇单雌产卵量、卵孵化率、成虫寿命、产卵前期和产卵期;同时自雌蝇羽化第一日起,连续15 d,每天每个温度处理下取雌蝇3头,采用间接酶联免疫(indirect enzyme-linked immunosorbentassay,ID-ELISA)法测定5种温度下雌蝇每日卵黄蛋白合成量及羽化后前15 d卵黄蛋白合成总量。结果表明,温度对家蝇成虫繁殖力影响显著。产卵量以24℃环境下最高(1 921.17粒/雌),24～28℃时产卵量显著下降。28℃时卵孵化率最高(93.48%),高或低于此温度,卵孵化率显著下降,当温度达36℃时,孵化率仅为60.78%。雌蝇在20～28℃范围内产卵期差异不显著,32℃及以上温度下,雌蝇产卵期显著缩短。产卵前期以20℃最长(9.83 d),28℃最短(3.00 d),高于28℃产卵前期又显著延长。雌、雄蝇寿命均随着温度升高而显著缩短。温度对广州种群雌蝇羽化后前15 d的卵黄蛋白合成影响显著,24℃下前15 d合成的总卵黄蛋白最高(1 683.15μg/雌),其次为28℃(1 591.95μg/雌),20℃最低(232.81μg/雌)。家蝇广州种群在24～28℃繁殖效率最高。     

温度对草地螟成虫产卵和寿命的影响

在16℃、19℃、22℃、25℃.28℃,31℃和34℃的范围内, 草地螟(Loxostege sticticalis L.)成虫的产卵前期与温度的关系呈逻辑靳谛曲线,产卵雌蛾数、产卵历期和产卵量均以22℃为最高。初步确定19-25℃为草地螟蛾产卵的适温范围,22℃为最适产卵温度,16℃和34℃分别为产卵温度的下限和上限。成虫寿命与温度的关系为负相关(r=-0.91,P<0.01)。表明在试验温度范围内,温度越高,成虫寿命越短。但温度对雌雄成虫寿命的影响不一致,在28℃以下的温度内,雄蛾寿命比雌蛾长;在31-34℃的范围内,雄蛾寿命比雌蛾短。根据以上研究结果,对我国草地螟发生为害区的种群动态规律进行了讨论。     

温、湿度对狭翅雏蝗Chorthippus dubius (Zub.)实验种群的影响

本文研究了不同温、湿度条件对狭翅雏蝗Chorthippus dubius(Zub.)实验种群的影响;在室内,温度控制在16℃、18℃、21℃、23℃、25℃、28℃、30℃、33℃、35℃和37℃,土壤含水率控制在5.0％、10.0％、14.3％,研究温度和土壤含水率对狭翅雏蝗卵孵化率的影响;温度控制在18℃、21℃、25℃、28℃、30℃、33℃、35℃和37℃,相对湿度控制在100％、80％和60％,研究温度和相对湿度对狭翅雏蝗蝻存活率、成虫生殖力和种群增长率的影响。 研究表明:温度、土壤含水率以及两者的交互作用对狭翅雏蝗卵的孵化率都有显著的影响;温度、相对湿度以及两者的交互作用对狭翅雏蝗卵的孵化率都有显著的影响。这种影响可用下列回归方程表示: y=a+b_1(T′-T)(T-T_0)+b_2(H′-H)(H-H_0)+b_3(H′/T_0-H/T)(H/T-H_0/T′)+b_4·(H′T′-HT)(HT-H_0T_0) 其中H′、H_0和T′、T_0分别为昆虫可存活的湿度的上、下限和温度的上、下限;T、H为实际温、湿度;y为存活率(或孵化率);a、b_1、b_2、b_3和b_4均为常数。 温度对狭翅雏蝗的生殖力有显著的影响,相对湿度的作用不太显著。狭翅雏蝗种群世代净增长率R_0>1的温度范围,在80％相对湿度下为27.0℃—31.5℃,在60％相对湿度下为23.0℃—29.5℃。     

温度对烟粉虱发育和繁殖的影响

研究了7个不同温度梯度对烟粉虱(Beimisia tabaci )B生物型发育、存活和繁殖的影响。在17℃时,烟粉虱从卵到成虫羽化需要48．7天,而在29℃则仅需要13．9天。烟粉虱发育的最佳温度是26℃,低温(＜20℃)和过高的温度(＞32℃)对烟粉虱发育有抑制作用。经线性回归分析,烟粉虱的发育起点温度约为13℃,有效积温为263．8℃。烟粉虱在20℃时,其成虫寿命和产卵量都是32℃时2倍多,单雌最高产卵量达到208粒。烟粉虱的存活率以26℃时最高,低温和高温对烟粉虱的存活率有负面影响。烟粉虱的内禀增殖率在26℃和29℃时较高,分别为0．1456和0．1470。所有数据显示26℃是烟粉虱种群发育和繁殖的最佳温度。     

黄连木种子小蜂的生物学特性和发生规律

通过田间及室内饲养观察,黄连木种子小蜂EurytomaplotnikoviNikolskaya在河南省太行山区为1年发生1代,以老熟幼虫在被害果内过冬。翌年4月中旬开始化蛹,5月下旬至6月上旬为成虫羽化产卵的盛期。幼虫5月中旬开始孵化,在果内取食至8月中、下旬老熟越冬。成虫在果壳内停留4～5d,出壳后成虫寿命:雄虫3～7d,雌虫4～17d,产卵前期3.7d。平均产卵量35.4粒,卵期3～4d。幼虫共5龄,预蛹期4～5d,蛹期8～10d,蛹期发育过程中形态变化的阶段性分为4级。成虫交尾产卵的最适温度为23～25℃,化蛹、羽化较适宜的湿度为65%～70%。     

温度对美洲斑潜蝇发育,存活和繁殖的影响

探讨了在光照周期为１４Ｌ１０Ｄ、Ｒ．Ｈ．为７０ ％ ±５ ％ 的恒温（１２ ～３５ ℃） 条件下美洲斑潜蝇的发育、繁殖和存活,求得美洲斑潜蝇世代的发育起点温度与有效积温分别为８ ．７７ ℃和２９５ ．６９ 日度,给出了温度与各虫态发育速率间的函数关系．２０ ～２７ ．５ ℃时存活率较高,死亡主要发生在蛹期,３５ ℃下蛹不能羽化．成虫寿命随温度的升高而缩短; 种群增长指数于２７ ．５ ℃时达到最高．     

双斑截尾寄蝇成虫生物学特性

双斑截尾寄蝇Nemorilla maculosa Meigen (双翅目：寄蝇科)是草地螟Loxostege sticticalis和其他鳞翅类昆虫的重要寄生天敌,但国内外对其生物学特性知之甚少。为了揭示双斑截尾寄蝇的生物学特性,在22℃,光周期16L∶8D的室内条件下对成虫羽化时期,交配持续时间,产卵量和寿命及其与补充营养的关系等进行了实验观察。结果表明： 双斑截尾寄蝇主要在08: 00－10: 00和14: 00－16: 00羽化。雄蝇比雌蝇早羽化1 d,雌蝇羽化后可立即进行交配,但雄蝇羽化1 d后才可交配; 交配持续时间为10～54 min,但多数为20～30 min; 平均产卵量为154.1粒,雌蝇平均寿命26.6 d,雄蝇为10.2 d,雌雄寿命差异显著。取食10%蜂蜜水的平均产卵前期为3.8 d,平均产卵历期为15.4 d; 而且取食10%蔗糖水、葡萄糖水或蜂蜜水之间的成虫产卵量没有显著差异,但均显著高于取食清水或纯饥饿空白对照的;同时,取食补充营养的雌蝇寿命均显著高于取食清水或空白对照的,但雄蝇的寿命则不受补充营养的影响。取食补充营养的雌蝇寿命与产卵量为正相关,即雌蝇的寿命越长,产卵量越大。最后,就这些结果的应用价值进行了讨论。     

Development, survivorship, and reproduction of Helicoverpa armigera (Lepidoptera: Noctuidae) under constant and alternating temperatures

Laboratory studies were conducted to assess the effect of temperature on the survival, development, fecundity, and longevity of Helicoverpa armigera (Hübner) at 11 constant temperatures ranging from 12.5 to 40 degrees C, as well as at five alternating temperature regimes (25-10, 30-15, 32.5-17.5, 35-20, and 35-27.5 degrees C) and under a photoperiod of 16:8 (L:D) h. H. armigera reared at constant temperatures did not develop from egg to adult (emergence) outside the temperature range of 17.5-32.5 degrees C. The alternating conditions expanded this range from 10 to 35 degrees C. The lowest developmental thresholds of the immature stages were estimated by a linear model and ranged from 10.17 (pupal stage) to 11.95 degrees C (egg stage) at constant temperature regimes and from 1.1 to 5.5 degrees C, respectively at alternating temperatures. The values of developmental thresholds estimated using the nonlinear (Lactin-2) model were lower than those estimated by the linear model for constant and alternating temperature regimes except for larval and pupal stages at constant temperatures. Mean adult longevity fluctuated from 34.4 d at 15 degrees C to 7.6 d at 35 degrees C. Females reared under all alternating temperature regimes laid more eggs than females reared at any, except the 25 degrees C, constant temperature treatment. The intrinsic rate of increase was highest at 27.5 degrees C, at both the constant and the corresponding alternating temperature regimes (0.147 and 0.139, respectively). Extreme temperatures had a negative effect on life table parameters.     

Developmental and reproductive biology of Scirtothrips perseae (Thysanoptera: Thripidae): a new avocado pest in California

The developmental and reproductive biology of a new avocado pest, Scirtothrips perseae Nakahara, was determined in the laboratory at five constant temperatures, 15, 20, 25, 27.5 and 30 degrees C. At 20 degrees C, S. perseae exhibited greatest larval to adult survivorship (41%), and mated females produced a greater proportion of female offspring at this temperature when compared to 15, 25, 27.5 and 30 degrees C. Average lifetime fecundity and preoviposition period was greatest at 15 degrees C at 39.6 eggs per female and 17.6 days, respectively. Jackknifed estimates of net reproduction (Ro), capacity for increase (rc), intrinsic rate of increase (rm), and finite rate of increase (lambda) were all significantly greater at 20 degrees C than corresponding values at 15, 25 and 27.5 degrees C. Population doubling time (Td) was significantly lower at 20 degrees C, indicating S. perseae populations can double 33-71% faster at this temperature in comparison to 15, 25 and 27.5 degrees C. Mean adult longevity decreased with increasing temperature, from a maximum of 52.4 days at 15 degrees C to a minimum of 2.4 days at 30 degrees C. Developmental rates increased linearly with increasing temperatures for eggs and rates were non-linear for development of first and second instar larvae, propupae, pupae, and for egg to adult development. Linear regression and fitting of the modified Logan model to developmental rate data for egg to adult development estimated that 344.8 day degrees were required above a minimum threshold of 6.9 degrees C to complete development. An upper developmental threshold was estimated at 37.6 degrees C with an optimal temperature of 30.5 degrees C for egg to adult development. Unmated females produced only male offspring confirming arrhenotoky in S. perseae.     

Parasitism capacity of Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) reared under different temperatures on Bonagota salubricola (Meyrick) (Lepidoptera: Tortricidae) eggs

The parasitism capacity of Trichogramma pretiosum Riley strain bonagota on Bonagota salubricola (Meyrick) eggs was studied under the temperatures of 18, 20, 22, 25, 28, 30 and 32 degrees C. The number of days with parasitism, accumulated parasitism, total number of eggs parasitized per female and parasitoid longevity was evaluated. In the first 24h, parasitism ranged from 1.6 (32 degrees C) to 8.8 (22 degrees C) eggs of B. salubricola. Accumulated egg parasitism of B. salubricola reached 80% in 1st to 4th day at 20 degrees C to 32 degrees C, respectively, and in the 7th day at 18 degrees C. Temperatures from 18 degrees C to 22 degrees C were the best suited for the total eggs parasitized for female, resulting in 35.4 and 24.6 eggs/male respectively. T. pretiosum female longevity ranged from 7.8 to 2.5 days, at 18 degrees C and 32 degrees C, respectively. The results showed that T. pretiosum strain bonagota is better adapted to temperatures from 18 degrees C to 22 degrees C.     

Effects of temperature on biology and life table parameters of the Asian citrus psyllid, Diaphorina citri Kuwayama (Homoptera: Psyllidae)

The development, survivorship, longevity, reproduction, and life table parameters of the Asian citrus psyllid, Diaphorina citri Kuwayama were evaluated at 10°C, 15°C, 20°C, 25°C, 28°C, 30°C and 33°C. The populations reared at 10°C and 33°C failed to develop. Between 15°C and 30°C, mean developmental period from egg to adult varied from 49.3 days at 15°C to 14.1 days at 28°C. The low‐temperature developmental thresholds for 1st through 5th instars were estimated at 11.7°C, 10.7°C, 10.1°C, 10.5°C and 10.9°C, respectively. A modified Logan model was used to describe the relationship between developmental rate and temperature. The survival of the 3rd through 5th nymphal instars at 15–28°C was essentially the same. The mean longevity of females increased with decreasing temperature within 15–30°C. The maximal longevity of individual females was recorded 117, 60, 56, 52 and 51 days at 15°C, 20°C, 25°C, 28°C and 30°C, respectively. The average number of eggs produced per female significantly increased with increasing temperature and reached a maximum of 748.3 eggs at 28°C (P<0.001). The population reared at 28°C had the highest intrinsic rate of increased (0.199) and net reproductive rate (292.2); and the shortest population doubling time (3.5 days) and mean generation time (28.6 days) compared with populations reared at 15–25°C. The optimum range of temperatures for D. citri population growth was 25–28°C.     

变温对甘蓝夜蛾生长发育和繁殖的影响

【目的】明确自然变温环境对甘蓝夜蛾Mamestra brassicae生长发育和繁殖的影响,深入研究其对环境温度的适应性。【方法】在13~25℃(日平均19℃), 16~28℃(日平均22℃), 19~31℃(日平均25℃), 22~34℃(日平均28℃)和25~37℃(日平均31℃) 5个梯度变温条件下,以大豆Glycine max植株叶片为寄主材料饲养甘蓝夜蛾卵,测定其各虫态发育历期、发育速率、成虫繁殖力及发育起点温度和有效积温。【结果】变温范围为13~25℃时甘蓝夜蛾发育历期最长,世代发育历期为65.93 d,显著长于其他变温处理。且随温度升高,其发育历期缩短,变温范围为22~34℃时,该虫发育历期最短,世代发育历期为38.46 d,显著短于其他变温处理。在变温范围为25~37℃时,该虫不能正常完成个体发育。在日平均温度(T)19~28℃范围内(最大温差12℃),甘蓝夜蛾卵、幼虫及蛹期的发育速率随温度升高而加快,且各个虫态发育速率(V)拟合方程均符合线性方程模型：V_卵期=0.125+0.048T, V_幼虫期=0.023+0.012T, V_蛹期0.027+0.013T, V_成虫=0.073+0.47T。甘蓝夜蛾雌雄成虫的寿命随着日平均温度的升高而逐渐缩短,雌雄成虫寿命在日变温范围13~25℃时最长,分别为7.91 d和8.00 d;在变温范围22~34℃时最短,分别为3.00 d和3.57 d。甘蓝夜蛾卵、幼虫、蛹、成虫发育起点温度分别为7.98, 6.54, 9.36和10.78℃,有效积温依次为87.00, 607.36, 351.51和108.52 d·℃。16~28℃的变温范围更适合甘蓝夜蛾种群的生存与繁殖,其种群趋势指数I为117.81。【结论】甘蓝夜蛾属于偏低温适应性害虫,对高温环境适应能力较低。研究结果为进一步研究甘蓝夜蛾自然种群发生规律及其发生期、发生量预测预报提供了科学依据。     

Influence of temperature on the development, reproduction and longevity of Ceratothripoides claratris (Thysanoptera: Thripidae) on tomatoes

Ceratothripoides claratris (Shumsher) is a serious pest attacking tomatoes in Thailand. Temperature-dependent development of C. claratris was studied at seven constant temperatures, i.e. 22, 25, 27, 30, 34, 35 and 40 degrees C. Pre-adult survivorship was greatest (95%) at 25 and 30 degrees C and shortest at 22 degrees C. Egg-to-adult time decreased within the range of 20 to 30 degrees C and at 34 degrees C it started to increase. The lower thermal threshold for egg-to-adult development was estimated at 16 and 18 degrees C by linear regression and the modified Logan model, respectively. The optimum temperature for egg-to-adult development was estimated at 32-33 degrees C by the modified Logan model. The influence of temperature on reproduction and longevity of C. claratris was determined at 25, 30 and 35 and 40 degrees C. Both inseminated and virgin females failed to reproduce at 40 degrees C. Virgin females produced only male offspring, confirming arrhenotoky. The sex ratio of the offspring of fertilized females was strongly female-biased, except at 25 degrees C. Mean total fecundity per female and mean daily total fecundity per female were highest for both virgin and inseminated females at 30 degrees C. Female longevity was longest at 25 degrees C and shortest at 40 degrees C. Male longevity was longest at 30 degrees C and shortest at 40 degrees C. The net reproductive rate (R0) and intrinsic rate of natural increase (rm) was greatest at 30 degrees C while, mean generation time (G) and the doubling time (t) were highest at 25 degrees C. The finite rate of increase (lambda) was fairly constant (1.1-1.5 days) over the three temperatures tested. The pest potential of C. claratris for tropical Asia is discussed.     

Temperature dependent development of the parasitoid Colpoclypeus florus (Hymenoptera: Eulophidae) in the laboratory

Development, fecundity, and longevity of Colpoclypeus florus (Walker), a parasitoid of Adoxophyes orana (Fischer von R?slerstamm) (Lepidoptera: Tortricidae), were studied under laboratory conditions at different constant temperatures. Developmental time from egg to adult was inversely related to temperature and at 25 degrees C was 12.81 +/- 0.19 d. No adults emerged at 30 degrees C. The thermal units required for development from egg to adult were 232.56 +/- 19.5 degree-days. Female C. florus oviposited (mean +/- SEM) on average 30.7, 57.4, 46.6, and 34.1 eggs at 15, 17, 20, and 25 degrees C. respectively. Adult longevity was 11 +/- 1.25 d at 17, whereas it decreased to 4.5 +/- 0.4 at 25 degrees C. Honey significantly increased longevity for both males and females. The highest net reproductive rate was 30.739 at 17 degrees C, whereas the highest intrinsic rate of increase and the shortest doubling time occurred at 25 degrees C.     

Parasitism, development and adult longevity of the egg parasitoid Telenomus nawai (Hymenoptera: Scelionidae) on the eggs of Spodoptera litura (Lepidoptera: Noctuidae)

When Telenomus nawai Ashmead or Trichogramma ostriniae Pang & Chen (Hymenoptera: Trichogrammatidae) was inoculated into intact egg masses of Spodoptera litura (Fabricius) that were covered with a scale-hair layer, T. nawai emerged from 76% of the eggs, while emergence of T. ostriniae was from only 3% of the eggs. When the hair layer was removed before inoculation, the rate by the latter increased to 21%. These observations confirmed that the hair layer effectively protects S. litura egg masses from attack by T. ostriniae, and that T. nawai parasitism is more effective. In order to assess the feasibility of T. nawai as a biological control agent for S. litura, parasitism rate, development time and adult longevity were examined in the laboratory. Emergence of T. nawai was observed in more than 95% of 0- and 1-day-old separated eggs of S. litura, but the rate decreased to 60% and 0% for 2- and 3-day-old eggs, respectively. The emergence rates of T. nawai were near 95% for temperatures in a range from 25 degrees C to 35 degrees C, but decreased to 80% at 20 degrees C. No parasitoids emerged at 15 degrees C. The developmental periods decreased as temperature increased from 20 degrees C to 35 degrees C. The developmental threshold occurred at 13.7 degrees C and 13.9 degrees C, and the effective accumulative temperatures from egg to adult emergence were 149.3 and 147.1 degree-days for females and males, respectively. Mean longevity of the adult females decreased with increasing temperature; 87.0 days at 15 degrees C and 9.5 days at 35 degrees C. The feasibility of the use of T. nawai for controlling S. litura is discussed.     

EFFECT OF TEMPERATURE ON THE DEVELOPMENT AND REPRODUCTION OF BEMISIA TABACI B BIOTYPE (HOMOPTERA: ALEYRODIDAE)

Abstract The development, survivorship and reproduction of Bemisia tabaci B biotype on eggplant at seven constant temperatures (17, 20, 23, 26, 29, 32 and 35°C) were studied. The developmental periods from egg to adult varied from 48.7 days at 17°C to 13.9 days at 29°C and the developmental threshold estimated for a generation by linear regression was 12.4°C. The optimum temperature for B. tabaci population growth was 26°C, both extremely low (< 17°C) and high temperature (> 32°C) delayed the development. Survivorships from egg to adult was 67.3% at 26°C, 27.6% and 29.0% at 35°C and 17°C respectively. The average longevity of females ranged from 39.6 days at 20°C to 12.8 days at 35°C. Oviposition per female varied from 164.8 eggs at 20°C to 78.5 eggs at 32°C. Both the longevity and oviposition of B. tabaci females at different temperatures were significantly different ( P < 0.05), and the intrinsic rate of natural increase ( r _m) for B. tabaci at 29°C was the highest.