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insecticidal
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  杀虫
    Study on insecticidal toxins produced by Xenorhabdus bovienii A54
    Xenorhabdus bovienii A54菌株杀虫物质的研究
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    Molecular Design, Construction and Expression of A Fused Insecticidal Gene
    融合杀虫基因的分子设计、构建及表达研究
短句来源
    The Effects of Helper Protein on the Expression of Insecticidal Crystal Protein in Bacillus Thuringiensis
    苏云金芽胞杆菌帮助蛋白对杀虫晶体蛋白表达的影响
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    Molecular Mechanism Associated with Insecticidal Activity of Xenorhabdus Nematophila Strain CB6
    嗜线虫致病杆菌CB6菌株杀虫活性相关分子机制
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    Studies on the Insecticidal Components of Celastraceae Plants in Qinling Mountain Area
    秦岭卫矛科植物杀虫活性成分研究
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  杀虫活性
    Molecular Mechanism Associated with Insecticidal Activity of Xenorhabdus Nematophila Strain CB6
    嗜线虫致病杆菌CB6菌株杀虫活性相关分子机制
短句来源
    Studies on the Insecticidal Components of Celastraceae Plants in Qinling Mountain Area
    秦岭卫矛科植物杀虫活性成分研究
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    Study of Insecticidal Active Components in Jatropha Curcas L. Seed on Its Extraction,Isolation and Toxicity Action Mechanism
    麻疯树(Jatropha curcas L.)种子杀虫活性物分离、纯化及作用机理研究
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    INSECTICIDAL ACTIVITY OF MODIFIED δ-ENDOTOXIN GENE OF BACILLUS THURINGIENSIS AIZAWAI 7-29
    苏云金芽孢杆菌aizawai 7-29 δ-内毒素基因改造后的杀虫活性研究
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    STUDY ON INSECTICIDAL ACTIVITY OF TRIFLUBENZURON
    氟幼灵的杀虫活性研究
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  “insecticidal”译为未确定词的双语例句
    Molecular Biology of Bacillus Thuringiensis Strain Ly30 with High Insecticidal Activity and Broad Spectrum
    高效广谱苏云金芽孢杆菌Ly30株的分子生物学研究
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    EFFECTIVENESS OF INSECTICIDAL DUSTS FOR THE CONTROL OF CHINESE ARMY WORM (PSEUDALETIA SEPARATA (WALKER))
    粉剂防治粘虫Pseudaletia separata(Walker)研究
短句来源
    P_2 INSECTICIDAL PROTEIN FROM PARASPORAL CRYSTAL OF BACILLUS THURINGIENSIS
    苏芸金杆菌伴孢晶体中P_2毒素蛋白的研究
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    A review of insecticidal effective of preventing termite by Chlorpyrifos and its progress of application study
    毒死蜱及其防治白蚁效果与应用研究进展综述
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    BP XptB1 has more than 58% identical to the following insecticidal toxins:TccC toxins from Photorhabdus luminescens,SepC from Serratia entomophila;
    BP XptB1与Photorhabdus luminescens的TccC毒素,Serratia entomophila的SepC,以及Yersinia pseudotubercusis和Y.
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  insecticidal
The thiones were evaluated for antibacterial, antifungal, and insecticidal activities and exhibit significant antibacterial activity and slight but not significant antifungal and insecticidal properties.
      
The result of SDS-PAGE indicates that the melanin of Bc58 can protect the insecticidal crystal proteins from degradation.
      
This suggests that it is an excellent UV protective agent for the insecticidal crystal proteins of the Bt formulation.
      
The Insecticidal Activity of Bacillus thuringiensisCells
      
Studies on the growth metabolism of Bacillus thuringiensis and its vegetative insecticidal protein engineered strains by microca
      
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Field plot tests on the control of the European corn borer,Pyrausta nubilalis Hubn.,withgranulated insecticides were carried out at Heng-shui,Ho-pei,during the year 1960-1961.One application of 5% DDT granules at the late whorl stage reduced the earlier borerpopulation about 80-90%,and the insecticides deposited in the leaf axils remained sufficientlyeffective for the control of those larvae hatched after tasselling.The total borer populationbrought under control by a single application was 65-77.4% on corn...

Field plot tests on the control of the European corn borer,Pyrausta nubilalis Hubn.,withgranulated insecticides were carried out at Heng-shui,Ho-pei,during the year 1960-1961.One application of 5% DDT granules at the late whorl stage reduced the earlier borerpopulation about 80-90%,and the insecticides deposited in the leaf axils remained sufficientlyeffective for the control of those larvae hatched after tasselling.The total borer populationbrought under control by a single application was 65-77.4% on corn planted in the spring and60-71.9% on corn planted in the summer.The best time for a single treatment was found tobe late whorl stage,earlier application of granules would be less effective.Double applicationsof insecticides,with the first at the late whorl stage and the second at the silking stage,weremore effective.The borer population on corn planted in spring and summer was reduced85.8-88.6% and 90.6-91:0%,respectively.No significant difference was found between formulations,dosages,and methods of applica-tion.Although the residual toxicity of 5% DDT and 0.5-1.0% γ BHC granules was found tobe well above one month,as the insecticides deposited in the leaf axils lost 85-88% of theiroriginal quantity within the same period,it is concluded that double application might benecessary espeeially when borer population is high.As the relation between amount of egg laying and the effectiveness of insectieidai applica-tion was insignificant,it is suggested that growth stage of corn can be used as the basis fortiming the insecticidal application.

1960—61连续二年在河北衡水施用颗粒剂防治玉米螟:春、夏玉米心叶末期用5% DDT 颗粒剂,不仅前期的螟虫减少了80—90%左右,穗期的螟害也适当地被控制。1次施药能减少整个春玉米生育期的虫数65—77.4%,夏玉米60—71.9%。防治效果似与玉米后期虫口密度有关。心叶期防治以在心叶末期为最理想,提早施药不能获得最高效果。心叶期防治2次与防治1次的效果没有差异。心叶末期与穗期各防治1次,收获时检查,防治效果春玉米上可达85.8—88.6%,夏玉米90.6—91%。因此,在螟害较轻的年分,防治1次即能解决大部分的螟害问题,大发生年分,可以在穗期再防治1次。试验证明不同载体、不同加工方法配制的颗粒剂、不同用量和不同施用方法的防治效果差异都不显著。虽然含5% DDT 或0.5—1%666的颗粒剂的残效能维持1个月以上,但由于田间植株上残存的颗粒剂损失很快,1个月后的残存量仅为12—15%,因此1次防治的效果受到限制。由于防治效果与施药时螟卵发生的情况关系不大,而心叶未期是防治最适时期,因此作者建议可以玉米生育阶段作为施药时期的标准。

Studies were carried out in Peking during 1962—1964 to investigate the mortalities of egg and larval stages and the relationship between the number of egg masses and the size of larval populations in a total of 12 fields of spring-sown corn during the whorl-stage. On the basis of the survival rates of both egg and larval stages of these fields as well as data on the effect of larval density on yield loss, a method for estimating yield loss caused by corn borer and the control index at whorl-stage were discussed....

Studies were carried out in Peking during 1962—1964 to investigate the mortalities of egg and larval stages and the relationship between the number of egg masses and the size of larval populations in a total of 12 fields of spring-sown corn during the whorl-stage. On the basis of the survival rates of both egg and larval stages of these fields as well as data on the effect of larval density on yield loss, a method for estimating yield loss caused by corn borer and the control index at whorl-stage were discussed. The following points are shown. (1) The 12 fields observed during the 3 year period showed a fairly wide range of egg and larval populations. These variations were due to the fluctuation in natural borer population in different years and the different planting dates in a given year. (2) The mean and its standard error of the per cent eggs hatched was 57.± 2.9%. while that of the larval survival rate was 5.64±0.89%. A measure of correlation showed that the number of eggs per 100 plants is positively correlated with the number of mature larvae. The comlimed survival rate and its standard error of both egg and larval populations was 3.4±0.51%. The flducial limits of the mean at a confidence level of 95% is 3.4±1.17%. (3) Current studies on the relationship between borer population and yield loss of corn by various workers have shown that the reduction in yield of corn infested at whorl-stage was sigficantly greater than that of the ear-stage. Thus the loss in yield due to borer infestation could generally estimated from records on the number of borers of the first generation. If the 5% loss in yield per borer per plant was used as an average reduction rate, then the loss in yield from an infestation having a particular egg mass count could be estimated by yield loss (%) = [(No. egg masses per 100plants× 31.7)× (0.034±0.012)] × 0.05 where 31.7 is the average number of eggs per egg mass. From the view-point of economic gain, a reduction rate of 1.5% probably will be valid as the critical control level, i. e., above which treatments should be made. The cumulative total number of egg masses per 100 plants that corresponds to this reduction rate is roughly 24. (4) The present writer have previously shown that the cumulative total of egg masses per 100 plants (X) during entire whorl stage is proportional both to the per cent of plants receiving one or more egg masses or the frequency index (P) (P = l e—0.00985x0.9984) and the highest number of egg masses found on any one day (Y) (Y = 0.352 x — 2.721). On the basis of these equations, it is calculated that this egg mass count corresponds to a frequency index of 21% or a number of 6 egg masses per 100 plants at the peak of egg deposition. Therefore, either a frequency index of 21% or a 6 egg masses count found at any one day during whorl stage may be used as an critical index for insecticidal treatment.

根据1962—1964年北京地区12块春播玉米地心叶期卵和卵虫(第一代)成活率資料,并参考国内对螟害与玉米产量損失关系的研究成果,提出了春玉米上因玉米螟为害而造成的产量損夫估計方法和药剂防治的参考指标。心叶期卵的平均成活率及其标准誤为57.4±2.9%,卵块的脫落是死亡的主要原因。幼虫期的平均成活率及其标准誤为5.64±0.89%。这两个平均成活率的变異系数都比较小,相关分析表明,百株着卵量与成长幼虫数是相关的。故可职利用卵和幼虫的平均成活率由着卵密度来估計成长幼虫密度。心叶期卵和幼虫的合計平均成活率及其标准誤为3.4±0.51%。在95%可靠性时的置信区間为3.4±1.173%,卵块的平均粒数为31.7粒。若职单株平均一虫所造成的产量損失率为5%計,可用丁式来估計产量損失: 产量損失%=[(心叶期百株累計卵块数×31.7)×(0.034±0.012)]×0.05 在經济核算士,作者初步認为职損失率1.5%作为防治标准比較合适。以此推算,欲达到这一損失率,心叶期百株累計卵块应为28块(用平均成活率計算)至21块(用成活率上界計算)。一般可定为24块。根据心叶期百株累計卵块数与累計着卵株百分率或百株高峯卵块数之...

根据1962—1964年北京地区12块春播玉米地心叶期卵和卵虫(第一代)成活率資料,并参考国内对螟害与玉米产量損失关系的研究成果,提出了春玉米上因玉米螟为害而造成的产量損夫估計方法和药剂防治的参考指标。心叶期卵的平均成活率及其标准誤为57.4±2.9%,卵块的脫落是死亡的主要原因。幼虫期的平均成活率及其标准誤为5.64±0.89%。这两个平均成活率的变異系数都比较小,相关分析表明,百株着卵量与成长幼虫数是相关的。故可职利用卵和幼虫的平均成活率由着卵密度来估計成长幼虫密度。心叶期卵和幼虫的合計平均成活率及其标准誤为3.4±0.51%。在95%可靠性时的置信区間为3.4±1.173%,卵块的平均粒数为31.7粒。若职单株平均一虫所造成的产量損失率为5%計,可用丁式来估計产量損失: 产量損失%=[(心叶期百株累計卵块数×31.7)×(0.034±0.012)]×0.05 在經济核算士,作者初步認为职損失率1.5%作为防治标准比較合适。以此推算,欲达到这一損失率,心叶期百株累計卵块应为28块(用平均成活率計算)至21块(用成活率上界計算)。一般可定为24块。根据心叶期百株累計卵块数与累計着卵株百分率或百株高峯卵块数之間存在的相关,百株累計24块卵,相当于累計着卵株率28%,或百株高峯卵块6块。在实践上就可以用它們作为心叶期的防治指标。

In 1975 we prepared 1-(3, 4-dichlorophenyl)-2, 2, 2-trichloroethyl acetate (laboratory code 7504) as a DDT substitute. Its insecticidal activity, toxicity to mammals and fishes and biodegradability were determined and compared with those of DDT. Its LD50 and KT50 to houseflies (Musca domestica vicina Macq) were found to be 4.89-5.89 μg/fly and 23 minutes 44 seconds in contrast to 50 μg/fly and 60 minutes for DDT respectively. A 60 day residual test in the laboratory for both compounds showed the KT50 was...

In 1975 we prepared 1-(3, 4-dichlorophenyl)-2, 2, 2-trichloroethyl acetate (laboratory code 7504) as a DDT substitute. Its insecticidal activity, toxicity to mammals and fishes and biodegradability were determined and compared with those of DDT. Its LD50 and KT50 to houseflies (Musca domestica vicina Macq) were found to be 4.89-5.89 μg/fly and 23 minutes 44 seconds in contrast to 50 μg/fly and 60 minutes for DDT respectively. A 60 day residual test in the laboratory for both compounds showed the KT50 was 48 minutes 26 seconds for 7504 and 96 minutes 5 seconds for DDT.During July to August in 1977 large scale tests were carried out in the living quarters and cattle sheds in Peking and Beidaho, Hopei. The insecticidal effect of 7504 at 2 grams per square meter lasted about one month and was somewhat better than DDT at the same condition.The accumulation of 7504 in chickens was determined and compared with that of DDT. The diet containing 7504 or DDT each in 100 ppm was fed randomly to chickens for 15 days. No 7504 was found in the chicken's body as a whole while a 495.5 ppm level was found for DDT. When 7504 in the diet was increased to 1000 ppm only a trace of this compound was found in the thoracic muscle and liver, none in the fat, and 167 ppm in the feces after 15 days' feeding.When 7504 was incubated with chicken liver homogenate at 37CCCC, more than 85% of the compound was degraded after 10 minutes and 97% after 20 minutes. The biological test of SR values of 7504 and DDT with houseflies were 15.8 and 2.2 respectively.

1975年我们合成了DDT的类似物——三氯杀虫酯(代号7504)。室内药效试验结果,对家蝇(Musca domestica vicina macq)的LD_(50)为4.89—5.89微克/头(DDT为50微克/头);用残膜法处理家蝇KT_(30)为23分44秒(DDT为60分)。处理后的残膜室内放置60天,处理家蝇KT_(30)为48分26秒(DDT为95分5秒)。1977年7—8月份进行了扩大药效试验。在住户和畜舍内以2克/米~2药量作滞留喷洒,对蚊、蝇成虫的药效可维持一个月左右。 “7504”在生物体内容易降解。家蝇试验SR值为15.8(DDT为2.2)。以DDT作对比,用含相同药量100ppm的鸡饲料,任其自由取食15天后,分析DDT在鸡体内的累积量为495.5ppm;而“7504”在鸡体内则没有发现。以1000ppm的“7504”喂15天后,在胸肌及肝内仅有微量存在,脂肪内未发现,而粪便内则达167ppm。如用胶囊每天强迫饲喂2克,7天后肝脏内含0.5ppm。脂肪内未发现。粪便内达625ppm。“7504”与鸡肝匀浆,在37℃条件下培育10分钟,可降解85%以上,培育20分钟有97%被降解。

 
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