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neem extracts
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  印楝提取物
     During a 24 days\' choice test of feeding, the branches were treated with a dosage of the neem extracts containing 100×10 -6 g/mL azadirachtin and the average food taken by the beetles in the treated group (7 pairs) was 3.53±0.38g per pair per day and that on the control group(7 pairs) was 3.42±0.60g per pair per day.
     在进行了 2 4d的选择取食试验中含印楝素 1 0 0× 1 0 -6g/mL的印楝提取物处理枝条 ,1 0对对照组天牛每天每对平均取食量为 3 53± 0 38g,而处理组天牛每天每对平均取食量 3 4 2± 0 60 g。
短句来源
     The hatching rate of the eggs laid by the beetles, which had fed on the treated branches with a dosage of neem extracts containing 50×10 -6 g/mL azadirachtin, reached 33.3% at the nineteenth day.
     取食含印楝素 50× 1 0 -6g/mL的印楝提取物处理枝条后天牛产的卵需经 1 9d达到其最终孵化率 ,33 33% ;
短句来源
     Effects of the Neem Extracts on Oviposition,Egg Hatchingand Larva Survival of Apriona germari
     印楝提取物对桑天牛产卵、卵孵化及其幼虫存活的影响
短句来源
     Effects of Neem Extracts on Feeding of Batocera horsfieldi
     印楝提取物对云斑天牛成虫选择取食的影响
短句来源
     Testing of Antifeedant Activities of Neem Extracts on the Diaphania idica Larvae
     印楝提取物对瓜叶螟幼虫拒食活性的测定
短句来源
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  “neem extracts”译为未确定词的双语例句
     The 4 different neem extracts showed great difference of fumigant against adults of Sitophilus zeamais Motschulsky.
     4种提取物对玉米象成虫都具有较好的忌避活性,随着时间的推移,忌避活性呈下降趋势;
短句来源
     The fumigant activity of the 4 different neem extracts was neem oil>neem SFE extracts>neem ethyl acetate extracts>azadirachtin A.
     4种提取物对玉米象成虫熏蒸活性差异较大,活性大小为印楝油>超临界CO2提取物>乙酸乙酯粗提物>印楝素A。
短句来源
     The bioactivities of two different neem extracts(neem CO2 supercritical extracts and neem ethyl acetate extracts) against Diaphania indica were investigated.
     在室内测定了印楝两种提取物(印楝乙酸乙酯萃取和CO2超临界萃取)对瓜绢螟的生物活性。
短句来源
     Both of the two neem extracts showed strongly deterred anti- feeding, growth inhibition, larval toxicity and oviposition deterrent, and the toxicity against early larvae are better than late larvae.
     两种提取物对瓜绢螟幼虫都具有较强的拒食作用、生长发育抑制作用,对成虫产卵忌避作用效果较好;
短句来源
  相似匹配句对
     Effects of Neem Extracts on Feeding of Batocera horsfieldi
     印楝提取物对云斑天牛成虫选择取食的影响
短句来源
     Study on the Bioactivities of Neem Seed Extracts to Green Leafhoppers
     印楝提取物对假眼小绿叶蝉的生物活性研究
短句来源
     Viewpoint Extracts
     观点摘编
短句来源
     New yeast extracts
     天然风味增强剂——酵母抽提物
短句来源
     Advanced Researches of Neem Insecticide
     印楝植物农药的研究进展
短句来源
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  neem extracts
The parasitoid larvae, however, were killed by feeding contaminated host larvae and also through contact with neem extracts.
      
The response to akamatsu plus neem was mostly the same as that to neem alone, suggesting the neem extracts inhibited the responses to akamatsu extracts.
      
This assessment is based on the information available on the wide range of pests against which neem extracts and compounds have proven to be toxic, toxicity to non-target organisms, e.g.
      
This review strives to assess critically the pest control potential of neem extracts and compounds for their use in the tropics.
      
Laboratory and field trial data have revealed that neem extracts are toxic to over 400 species of insect pests some of which have developed resistance to conventional pesticides, e.g.
      
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When adult Apriona germari was fed with twigs of Broussonetia papyrifera treated with a dose of 1.0 μg/mm 2 of thermopsine and cytisine respectively, thermopsine showed no feeding deterring effects and cytisine showed significant feeding deterring effects. With the same dose, both two alkaloids caused the longicorn bettle to reduce oviposition and egg hatching significantly without their death, When A. germari was fed with twigs of B. papyrifera treated with the doses of 8.0×10 -2 ...

When adult Apriona germari was fed with twigs of Broussonetia papyrifera treated with a dose of 1.0 μg/mm 2 of thermopsine and cytisine respectively, thermopsine showed no feeding deterring effects and cytisine showed significant feeding deterring effects. With the same dose, both two alkaloids caused the longicorn bettle to reduce oviposition and egg hatching significantly without their death, When A. germari was fed with twigs of B. papyrifera treated with the doses of 8.0×10 -2 ,4.0×10 -2 ,2.0×10 -2 ,1.0×10 -2 ,5×10 -3 μg/mm 2 of neem extracts (Containing azadirachtin 10%) respectively, the first two doses caused 100% mortality, the dose of 2.0×10 -2 μg/mm 2 led 80% mortality and completely inhibition of oviposition, the last two doses led 30% and 0 mortalities respectively and radical reduction in oviposition and egg hatching. This is the first report of the reduction effects of quinolizdine alkaloids on oviposition and egg hatching in Insecta, also of the inhibiting effects of neem extracts on oviposition and egg hatching in Cerambycidae.

用1.0μg/mm2剂量的黄华碱和野靛碱处理的构树枝分别喂饲桑天牛,黄华碱不表现拒食作用,但野靛碱表现出显著的拒食作用。同样剂量条件下,两种生物碱均能使桑天牛的产卵量和卵孵化率显著下降,但没有引起死亡。用8.0×10-2,4.0×10-2,2.0×10-2,1.0×10-2,5.0×10-3μg/mm2剂量的印楝提取物(含azadirachtin10%)处理的构树枝喂饲桑天牛,前二种剂量引起100%死亡率,2.0×10-2μg/mm2剂量引起80%死亡率并导致雌虫不再产卵,而后两种剂量引起的死亡率为30%和0%,并导致产卵量和卵孵化率较对照急剧地下降。报道了双稠哌啶类生物碱对昆虫引起产卵量和卵孵化率下降作用及天牛科中印楝提取物抑制产卵和卵孵化的作用。

The branches of \%Broussonetia papyrifera\% Linn. were treated with neem extracts(Neem EC) as the food of the beetle (\%Apriona germari\% Hope), the effects of neem extracts on the oviposition and egg hatch of the beetle were investigated. The testing pair beetles were put into the plastic containers with a diameter of 25 cm and of a height 25 cm and covered with iron screen. During 15 days testing period, the average egg number laid per pair beetles per day in treated group (7 pairs), which...

The branches of \%Broussonetia papyrifera\% Linn. were treated with neem extracts(Neem EC) as the food of the beetle (\%Apriona germari\% Hope), the effects of neem extracts on the oviposition and egg hatch of the beetle were investigated. The testing pair beetles were put into the plastic containers with a diameter of 25 cm and of a height 25 cm and covered with iron screen. During 15 days testing period, the average egg number laid per pair beetles per day in treated group (7 pairs), which were fed on branches treated by neem extracts containing 50×10 -6 g/mL azadiractin was 2.00±1.56 and that in the control group (7 pairs) was 10.33±3.33. T\|test showed significant difference in the values of the average egg number laid between treated and control groups. In the test with a dosage of the neem extracts containing 100×10 -6 g/mL azadirachtin, in the treated group (7 pairs), the beetles began to die on the fifth day and all the beetles were died on the eighth day, their average egg number laid per pair for the living beetle pairs per day, was 1.00±1.41 and that for the control group was 13.73±2.90. T\|test showed the difference between the two values was significant. The hatching rate of the eggs laid by the beetles, which had fed on the treated branches with a dosage of neem extracts containing 50×10 -6 g/mL azadirachtin, reached 33.3% at the nineteenth day. However, that of eggs laid by the control beetles was 98.9% on the ninth day. During a 24 days\' choice test of feeding, the branches were treated with a dosage of the neem extracts containing 100×10 -6 g/mL azadirachtin and the average food taken by the beetles in the treated group (7 pairs) was 3.53±0.38g per pair per day and that on the control group(7 pairs) was 3.42±0.60g per pair per day. T\|test showed that the difference between the two values was insignificant. It indicated that the beetle could not distinguish the food treated with neem extracts, that is, neem extracts is not an antifeedant for the beetle. Based on the above results a new way using neem extracts to control the beetle was put forward and discussed.

使用一定浓度的印楝提取物 (NeemEC)处理的构树枝条作为天牛的食物 ,研究了其对桑天牛产卵量及卵孵化率的影响。在室温下 ,将成对的天牛放在盖有铁砂网的直径 2 5cm高的塑料桶中进行实验。用含印楝素 50× 1 0 -6g/mL的印楝提取物处理枝条 ,处理组天牛 ( 7对 )在 1 5d试验中 ,其每天对平均产卵量为2 0 0± 1 56个 ,而对照组每天平均产卵量为 1 0 33± 3 33个。经T—检验处理组与对照组之间差异显著。用含印楝素 1 0 0× 1 0 -6g/mL的印楝提取物处理枝条 ,在 1 5d试验中 ,处理组 7对天牛从第 5d开始死亡 ,至第 8d全部死亡 ,按实际成活天数计算 ,其每天每对平均产卵量为 1 0 0± 1 4 1个 ,而对照每天每对平均产卵量为 1 3 73± 2 90个。经T—检验两者之间差异显著。取食含印楝素 50× 1 0 -6g/mL的印楝提取物处理枝条后天牛产的卵需经 1 9d达到其最终孵化率 ,33 33% ;而对照组 9d达到最终孵化率 98 96%。在进行了 2 4d的选择取食试验中含印楝素 1 0 0× 1 0 -6g/mL的印楝提取物...

使用一定浓度的印楝提取物 (NeemEC)处理的构树枝条作为天牛的食物 ,研究了其对桑天牛产卵量及卵孵化率的影响。在室温下 ,将成对的天牛放在盖有铁砂网的直径 2 5cm高的塑料桶中进行实验。用含印楝素 50× 1 0 -6g/mL的印楝提取物处理枝条 ,处理组天牛 ( 7对 )在 1 5d试验中 ,其每天对平均产卵量为2 0 0± 1 56个 ,而对照组每天平均产卵量为 1 0 33± 3 33个。经T—检验处理组与对照组之间差异显著。用含印楝素 1 0 0× 1 0 -6g/mL的印楝提取物处理枝条 ,在 1 5d试验中 ,处理组 7对天牛从第 5d开始死亡 ,至第 8d全部死亡 ,按实际成活天数计算 ,其每天每对平均产卵量为 1 0 0± 1 4 1个 ,而对照每天每对平均产卵量为 1 3 73± 2 90个。经T—检验两者之间差异显著。取食含印楝素 50× 1 0 -6g/mL的印楝提取物处理枝条后天牛产的卵需经 1 9d达到其最终孵化率 ,33 33% ;而对照组 9d达到最终孵化率 98 96%。在进行了 2 4d的选择取食试验中含印楝素 1 0 0× 1 0 -6g/mL的印楝提取物处理枝条 ,1 0对对照组天牛每天每对平均取食量为 3 53± 0 38g,而处理组天牛每天每对平均取食量 3 4 2± 0 60 g。经T—检验两者差异不显著。这说明桑天牛不能分辩含印楝提取物的食物 ,即印楝提取物对桑天牛不具拒食性。?

Broussonetia papyrifera L. one of the hosts of Apriona germari Hope was chosen as trap trees.Six trap trees were planted in a relatively isolated poplar forest with an area of 0.13 hm 2.The breast diameters of the trap trees were between 8 and 10 cm.Two gram of the neem extract (preparation) containing 30% azadiractin was injected into each trap tree in April once a year.The (results) of the field tests showed that before the injection the attacking rates of control group and treated group were 57.50%...

Broussonetia papyrifera L. one of the hosts of Apriona germari Hope was chosen as trap trees.Six trap trees were planted in a relatively isolated poplar forest with an area of 0.13 hm 2.The breast diameters of the trap trees were between 8 and 10 cm.Two gram of the neem extract (preparation) containing 30% azadiractin was injected into each trap tree in April once a year.The (results) of the field tests showed that before the injection the attacking rates of control group and treated group were 57.50% and 56.41% respectively,which were not (significantly) (different).In the second year the attacking rate of the treated group dropped greatly to 38.46% while that of the control group remained 70.00%.In the third year,the former dropped to 23.08%,the latter rose to 82.50%.The perspectives and advantages of application of natural compounds against forest insect pests were (also) discussed.

以桑天牛成虫AprionagermariHope喜食的构树为引诱树 6株 ,选取一块与周围树林相对孤立的杨树林为试验地 ,试验地面积约为 0 13hm2 ,设引诱树 6株 ,胸径 8~ 10cm。每年 1次将 2g含 30 %印楝素的印楝种核提取物配成制剂 ,注入构树中 ,进行防治桑天牛林间试验。结果表明 :注药前 ,对照虫株率 (5 7 5 0 % )与处理虫株率 (5 6 4 1% )之间差异不显著。注药 1a后处理林的虫株率下降至 38 4 6 % ,对照林的虫株率增加到 70 0 0 % ;2a后 ,处理林的虫株率下降到 2 3 0 8% ,对照林的虫株率达 82 5 0 %。讨论了应用天然化合物防治林木害虫的优点和前景

 
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