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instar
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    THE PROTEIN METABOLISM OF CASSAVA-SILKWORM (PHILOSAMIA CYNTHIA RICINA)FROM FIFTH INSTAR TO PUPATION
    木薯蚕五至化蛹蚕蛋白质代谢的研究
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    The Characteristics and Applications of The Distribution Pattern Parameters of Low Instar Nymph of Sogatella Furcifera in Rice Fields
    白背飞虱低若虫空间分布参数的特征及应用
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    Determination and Tissue Distribution of Microsomal Cytochrome P450 and Cytochrome b 5 in Six instar Larva of Helicoverpa armigera Hbner
    棉铃虫六幼虫微粒体细胞色素P450和细胞色素b_5的测定及组织分布
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    The morality rates against S.exigua and H.armigera (1st instar) were 9.7% and 22.1% respectively,and the inhibiting rates of larval weight against S.exigua and H.armigera (2nd instar) were 90.7%±6.6% and 78.7%±6.6% respectively.
    对棉铃虫Helicoverpaarmigera初孵幼虫的校正死亡率为22.1%,对2幼虫的体重增长抑制率为78.7%±6.6%。 发酵液中以胞内可溶性物质为主。
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    sinica,the LD50 values of imidacloprid,acetamiprid and buprofezin were 16.59,178.2 and 10 286 mg/L to eggs respectively,were 54.08,22.79 and 215.5 mg/L to the 2nd instar larvae respeitively,and were20.06,26.05 and 1 836 mg/L to adults respectively. The LD50 values ofthe three pesticides to adults of O.
    吡虫啉、啶虫脒和噻嗪酮对中华草蛉卵的LD50值分别为16.59、178.2和10286mg/L,对2幼虫的LD50值分别为54.08、22.79和215.5mg/L,对成虫的LD50值分别为20.06、26.05和1836mg/L;
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  龄期
    STUDY ON THE INSECT RESISTANCE OF TRANSGENIC HYBRID POPLAR 741 TO VARIOUS INSTAR LARVAE OF GIPSY MOTH
    转基因741杨对舞毒蛾不同龄期幼虫的抗性研究
短句来源
    1. Instars identification of over-wintering larvarThe width of head capsules those larva moult in different instars and generations are measured, the results show that over-wintering larva are mainly fifth instar, and there are 22.0% fourth and 53.0% fifth as well as 25.0% sixth instar.
    1 越冬幼虫龄期的判定通过室内饲养与野外采集的幼虫比较发现,徂徕山赤松林的越冬幼虫存在4、5、6龄3个龄期,分别占越冬幼虫的22.0%、53.0%和25.0%;
短句来源
    The LCso value of the second instar larvae was 0.09 mg/L. but the third and forth instar larvae were 0.80, 1.42mg/L respectively, the activities of spinosad were decrease 8.89, 15.78 times;
    多杀菌素对甜菜夜蛾二、三、四龄幼虫的LC_(50)值分别为0.09、0.80、1.42mg/L,随着龄期增高,生物活性分别下降8.89、15.78倍;
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    The threshold temperatures and effective accumulate temperature of development of Hemiberlesia potysiphila have been determined. The developmental threshold temperature of the I instar nymph is 6.6℃ ±0.8℃ ,the II instar nymph9.0℃±1.0 ℃ , the pupal stage 12.0℃ ±1.6℃ , the female adult stage 9.7℃±1.4℃, the whole life history10.1℃±0.7℃ .
    湿松突圆蚧各龄期发育的起点温度:一龄若虫为6.6℃±0.8℃,二龄若虫为9.0℃±1.0℃,蛹期为12.0℃±1.6℃,雌成虫为9.7℃±1.4℃,整个生活史为10.1℃±0.7℃;
短句来源
    After 5 days, the results showed that, survival larvae of F1 and F1' developed to 1st~ initial-2nd instar and weighted 0.1mg~0.7mg/larvae.
    处理5天后的结果表明:喂饲Bt棉叶5天,F_1和F_1′存活幼虫的发育龄期为1龄到2龄初期,体重在0.1-0.7mg/头;
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  “instar”译为未确定词的双语例句
    The results showed that the expression of CYP6AE12 was higher in fat body than in midgut in the 6th instar larvae of both strains, whereas the expression of CYP9A18 was higher in midgut than in fat body.
    结果表明:CYP6AE12和CYP9A18的mRNA表达具有组织特异性,CYP6AE12在脂肪体中表达量较高,而CYP9A18在中肠中的表达量较高。
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    Compared with the control,the two transgenic lines TT1 and TT3 retarded the development of the 1-3 instar larvae for 1.24 days and 2.92 days,and the mean body weight of 8 to 19 days of larvae fed with TT1 and TT3 reduced by 1.42%~17.37% and 10.77%~24.80%,respectively.
    取食TT18~19d的幼虫平均体质量与对照相比下降1.42%~17.37%、取食TT38~19d幼虫平均体质量下降10.77%~24.80%;
短句来源
    The Effect of 20 Kinds of Insecticides Against older Instar Larva of Cnaphalocrocis Medinalis
    20种杀虫剂对稻纵卷叶螟高龄幼虫的效果
短句来源
    Determination of the bioactivities of 82 plant crude extracts against the 3rd instar of Plutella xylostella
    宁夏地区82种植物提取物对小菜蛾幼虫生物活性的测定
短句来源
    The base-line forBPHthird instar to buprofezin is Y=6.6499+2.8865x, LC50.268 mg a.
    褐飞虱对噻嗪酮的敏感毒力基线为Y=6.6499+2.8865x,LC_50=0.268mg a.
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  instar
larval instar, affected the decision of parasitoid S.
      
Distinct morphometric characters can be found only in late-instar larvae.
      
Species identification of the early-instar dragonfly larvae is still problematic.
      
The influence of precocene II, an antijuvenile agent, on morphological characters of the chemoreceptor apparatus of antennae and mouthparts was studied in fifth instar A.
      
Later, somatic muscle development was enhanced in the first instar larvae ofM.
      
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In Kwei-ting, Southwest China, the tobacco leaf-miner has five complete overlapping genera-tions. In the tobacco growing region of Kweichow, 30-40% of the tobacco plants are affected.Alternate hosts of this pest include: Nicotiana fabacum, N. rustica, N. repanda, N. persica, Solanum melongena,Datura sp., Solanum tuberosum, Cirsium segetem, Capsicum longum and Lycopersicum esculentum. The tobacco leaf-miner passes the winter in the egg, larva, pupa or adult stage. , Effective control measures include spraying...

In Kwei-ting, Southwest China, the tobacco leaf-miner has five complete overlapping genera-tions. In the tobacco growing region of Kweichow, 30-40% of the tobacco plants are affected.Alternate hosts of this pest include: Nicotiana fabacum, N. rustica, N. repanda, N. persica, Solanum melongena,Datura sp., Solanum tuberosum, Cirsium segetem, Capsicum longum and Lycopersicum esculentum. The tobacco leaf-miner passes the winter in the egg, larva, pupa or adult stage. , Effective control measures include spraying with 0. 01%γ BHC or 1% DDT at the appearanceof the first instar larvae, and the destruction of the overwintering insect stages and their overwin-tering plan hosts.

1.烟潜叶蛾属鳞目、麦蛾科,学名经请中国科学院昆虫研究所朱弘复教授鉴定,是Gnorimoschema operculella(Zeller)。 2.至今据有关农业机关调查;烟潜烟蛾在我国分布已有6省、82县(市)以上。 3.寄主以茄科植物为主,计有烟草、茄、马铃薯、番茄、辣椒、蔓陀萝、刺菜。在贵定一带一年发生5个完整的叠置世代;越冬虫态有卵、幼虫、蛹、成虫;越冬处所是烟、茄楂地及地边烟杆堆处,农家马铃薯贮藏处所较少。 4.烟潜叶蛾在烤烟本田生长期发生两个叠置世代;前期为害轻,后期为害重。自2月下旬以至3、4月间马铃薯、烟相继萌芽生长,越冬的烟潜叶蛾迁移过来,烟移植了苗床期也就结束、马铃薯也将收获完毕,此后即迁移到烟本田里,这是按据烟潜叶蛾在主要寄主植物间的消长,认为是这样迁移的。 5.烟潜叶蛾的主要习性是:成虫具慕光性,夜晚活动,产卵于脚叶及烟株茎基部,散产,也有2—3粒产在一起的。卵多于清早孵化,初孵化的幼虫多在叶片或茎上,活动2至149分钟不等,才开始蛀叶取食。幼虫主要是集中为害脚叶,潜痕因故破裂时,多行迁移。化蛹在地面、脚叶、或茎基部、地面残枝树叶上。 6.进行防治以拔除处理烟、茄楂杆,并厉行秋耕,可为...

1.烟潜叶蛾属鳞目、麦蛾科,学名经请中国科学院昆虫研究所朱弘复教授鉴定,是Gnorimoschema operculella(Zeller)。 2.至今据有关农业机关调查;烟潜烟蛾在我国分布已有6省、82县(市)以上。 3.寄主以茄科植物为主,计有烟草、茄、马铃薯、番茄、辣椒、蔓陀萝、刺菜。在贵定一带一年发生5个完整的叠置世代;越冬虫态有卵、幼虫、蛹、成虫;越冬处所是烟、茄楂地及地边烟杆堆处,农家马铃薯贮藏处所较少。 4.烟潜叶蛾在烤烟本田生长期发生两个叠置世代;前期为害轻,后期为害重。自2月下旬以至3、4月间马铃薯、烟相继萌芽生长,越冬的烟潜叶蛾迁移过来,烟移植了苗床期也就结束、马铃薯也将收获完毕,此后即迁移到烟本田里,这是按据烟潜叶蛾在主要寄主植物间的消长,认为是这样迁移的。 5.烟潜叶蛾的主要习性是:成虫具慕光性,夜晚活动,产卵于脚叶及烟株茎基部,散产,也有2—3粒产在一起的。卵多于清早孵化,初孵化的幼虫多在叶片或茎上,活动2至149分钟不等,才开始蛀叶取食。幼虫主要是集中为害脚叶,潜痕因故破裂时,多行迁移。化蛹在地面、脚叶、或茎基部、地面残枝树叶上。 6.进行防治以拔除处理烟、茄楂杆,并厉行秋耕,可为治本办法。他如提前移植,结合耕作管理打除处理胎叶,用0.01%γ-666或1%DDT液剂在初龄幼虫期喷药

Thewoolly aphis, is one of the major insect pests of the apple in Eastern Shan-tung. Serious damage caused by the attack of the aerial form of this insect in neg-lected orchards, often caused death to the apple trees. According to observations made in Tsingtao, the woolly aphis reproduced anaverage of 8-9 generations, with a maximum of 17 generations per year. Winteris spent mainly by the 1st and the 2nd instar nymphs, hibernating in the woundsand crevices of the apple tree. Overwintering nymphs nd apterous...

Thewoolly aphis, is one of the major insect pests of the apple in Eastern Shan-tung. Serious damage caused by the attack of the aerial form of this insect in neg-lected orchards, often caused death to the apple trees. According to observations made in Tsingtao, the woolly aphis reproduced anaverage of 8-9 generations, with a maximum of 17 generations per year. Winteris spent mainly by the 1st and the 2nd instar nymphs, hibernating in the woundsand crevices of the apple tree. Overwintering nymphs nd apterous agamic femaleswere also found at the base of the trunk just below soil level, and on suckers thathad been allowed to grow around the tree, but the damage caused by the root formof this insect is negligible. By the end of April to early May (average temperature 11.0-14.3℃) newly-born nymphy were seen to crawl to the base of the young growing shoots. Thepeak of migration being in June and the early part of July, where an average ofonly 8.2 days is needed to complete a cycle. Each female may then give forth toan average of 94.2 nymphs parthenogenetically. Two gererations of winged agamic females were recorded during the wholelife history. The summer form, though not often seen, occured from May 20 to June23, these gave birth to apterous agamic females and sexuales. Towards the latterpart of August, a brood of fall winged migrants are developed. Their number in-creased as the colonies grow, reaching an average of 23.1-46.4% of winged indivi-duals per colony by September 18 to October 18. The fall migrants gave birth onlyto wingless and mouthless true males and females. After pairing, only a singlefertilized egg was laid by the female. Due to the high mortality of these sexuales,no eggs as yet was found overwintering on the apple tree. Eggs obtained in labora- tory conditions and hundreds of adult sexuales transplanted in October to previous-ly sterlized wounds on the branches of the apple tree, also failed to hatch in thefollowing year, though further works are still being needed to ascertain this fact. Early instar nymphs were also found to infest the calyx of the fruit, thoughnone of them could live up to the adult stage. According to a preliminary test on20 infested apples stored under room temperature from September to October, nonymphs were found to be alive in the calyx after 50 days storage. Studies madeon the time of calyx infestation are in accordance with those of migration. The natural enemies of the woolly aphis are in the order of their importance:a minute chalcid parasite (Aphelinus mali Hald.), the larva of a Chrysopa sp., ladybird beetles and a syrphus maggot. These played an important part in the sup-pressing of this pest in some months of the year. Based on these facts and on the lifehistory of the woolly aphis, an effective spray program has been devised in the controlof Eriosoma. These include a resin wash solution to be diluted with 20 parts ofwater plus 0.02%γ wettable BHC or 5%-6% tar distillate, to be applied in the dor-mant stage; followed by two successive sprays of 0.02-γ-0.03%γ BHC during theearly period of migration, about May 15 and June 10. At the above concentrationand time of usage, BHC proved to have no deleterious effect on the apple.

1.苹果绵蚜在青岛地区1年中最高繁殖代数为17代,平均8—9代。 2.绵蚜1年中繁殖率从6月中旬至7月中旬(22—25℃)为最高,当平均气温连续多日高达26℃以上时其繁殖率显著下降。生长季节一般低温对绵蚜总繁殖率影响不大。 3.夏季有翅蚜发生时期为5月下旬至6月下旬,为数较少,出现时期也很零散,可胎生无翅胎生绵蚜与雌雄性蚜。秋季有翅蚜自8月底开始发生,盛期在9月中旬至10月中旬,10月中旬以后即极少发生,其后代为雌雄性蚜。 4.有翅蚜无口吻,约于7—9日内脱皮4次即行交尾,雌蚜仅产卵1粒,未经交配者不产卵。性蚜自然死亡率很高(平均81.2%),在田间尚未发现有越冬卵。 5.棉蚜主要越冬场所均在其原寄生部位,如伤口、裂缝内与根部不定芽上。越冬虫态以Ⅰ、Ⅱ龄绵蚜为主。 6.绵蚜之迁移以Ⅰ龄若虫为主,5月下旬至7月中旬为主要迁移为害时期。 7.绵蚜可在苹果的萼洼内寄生为害。 8.除西洋苹果、山荆子、花红与海棠外,尚未发现绵蚜有其他寄主。 9.20倍松脂合剂加0.02%γ可湿性666或5%—6%蒽油乳剂,为防治越冬绵蚜的有效药剂。生长季节可用666乳剂或可湿性666防治。 10.666酸霉味对果实品质能引起不良影响,...

1.苹果绵蚜在青岛地区1年中最高繁殖代数为17代,平均8—9代。 2.绵蚜1年中繁殖率从6月中旬至7月中旬(22—25℃)为最高,当平均气温连续多日高达26℃以上时其繁殖率显著下降。生长季节一般低温对绵蚜总繁殖率影响不大。 3.夏季有翅蚜发生时期为5月下旬至6月下旬,为数较少,出现时期也很零散,可胎生无翅胎生绵蚜与雌雄性蚜。秋季有翅蚜自8月底开始发生,盛期在9月中旬至10月中旬,10月中旬以后即极少发生,其后代为雌雄性蚜。 4.有翅蚜无口吻,约于7—9日内脱皮4次即行交尾,雌蚜仅产卵1粒,未经交配者不产卵。性蚜自然死亡率很高(平均81.2%),在田间尚未发现有越冬卵。 5.棉蚜主要越冬场所均在其原寄生部位,如伤口、裂缝内与根部不定芽上。越冬虫态以Ⅰ、Ⅱ龄绵蚜为主。 6.绵蚜之迁移以Ⅰ龄若虫为主,5月下旬至7月中旬为主要迁移为害时期。 7.绵蚜可在苹果的萼洼内寄生为害。 8.除西洋苹果、山荆子、花红与海棠外,尚未发现绵蚜有其他寄主。 9.20倍松脂合剂加0.02%γ可湿性666或5%—6%蒽油乳剂,为防治越冬绵蚜的有效药剂。生长季节可用666乳剂或可湿性666防治。 10.666酸霉味对果实品质能引起不良影响,经初步试验其施用时期最晚不应迟于采收前1个半月至2个月。

Following the report made in 1958, continuous studies were carried on during, 1959--1961in the cotton growing regions of Hupei, Honan, Yunnan and some other provinces. This papermainly deals with the following aspects: geographical distribution of the generations, activities inthe period of late autumn to next spring, different nutritional conditions in relation to develop-ment, selection of host plants by moths, some characteristic habits of adult and larva, some moreimportant factors of outbreak, and some...

Following the report made in 1958, continuous studies were carried on during, 1959--1961in the cotton growing regions of Hupei, Honan, Yunnan and some other provinces. This papermainly deals with the following aspects: geographical distribution of the generations, activities inthe period of late autumn to next spring, different nutritional conditions in relation to develop-ment, selection of host plants by moths, some characteristic habits of adult and larva, some moreimportant factors of outbreak, and some key points of control. The generations produced in different regions may be classified into four belts: 1. Three-generation-belt——localized at 40°N northword; 2. Four-generation-belt——between 32--40°N; 3Five-generation-belt——25—30°N; 4. Six-generation-belt——generally resided at 25°N southword.There are a few instances of seven generations. Of adult and larval development, different results were obtained from different nutritional con- ditions. When larvae fed with the reproductive organs of cotton plant, their growth rate wasfaster, mortality lower and pupal weight also heavier. The food of adult stage is very important to its fecundity. The highest fecundity was foundwhen the moths fed with pollen of cotton flower and 10%. water diluted honey. However, 10—30% cane suger solution was also good. It seems that the moths are highly selective in visiting plants. They visit onions for takingfood from the onion flowers and peas for laying eggs only. The cotton plant is an importanthost for egg laying, but not a favorable food plant for the adult. On the other hand, the sunflower is a good food plant, for adult but not a favorable host for oviposition. There are three main times of adult flight. In the evening, about 19:30—20:30 PM, theadults fly for feeding and oviposition. Mating flight was found at about 1:30—4:00 AM. Atdawn, it was very inactively. Some points of larval habits are needed to mention: The egg hatches mostly at 12:00--18:00PM. The molting period is mostly at night. There is a resting period before molting. The restingperiod of larva becomes longer following its instar increases. The larva always molt outside theboll, and after molting, it usually bores into a new boll to feed which takes place ordinarily at5:30--12:00 AM. The third to sixth instar larvae possess a very large feeding capacity, the averagetotal is about 22.3 squares, flowers and bolls. The basic overwintering pupal population is closely related to the population of first generationin the next spring. The amount of rainfall directly effects the population of various generationsof cotton bollworms. Generally, when the annual amount of rainfall in the Yellow river cottoncultivating region is higher than ordinary year, or when the amount of rainfall in Yangtze riverregion is lower than ordinary year, and the relative humidity of both regions usually keeps around80% which will then very favorable to the cotton bollworms. Storm may wash off and kill theeggs and the young larvae. Due to rainfall in the pupal stage, soil contains too much water whichis unfavorable to the pupae and also to the emergence of moths. According to the various environ-mental conditions, the population of the cotton bollworm in Yellow river region maybe classified into four types: 1. Up grade type——population gradually increases from the firstto the last generation. 2. Down grade type——population decreases in each 3. Midhump type——The highest peak locates in the middle generation. 4. Saddle type——The population of the middlereaches the lowest and much higher at both ends. Besides the chemical control, some other aspects are considered more important in checkingthe population of cotton bollworms. They are the elimination of overwintering pupae by meansof various methods, the destruction of honey producing flower plants in spring in order to elimi-nate the food sources of adults, the attraction of moths by means of different kinds of light andalso the tree stick bundle method, etc.

继续1958年棉铃虫研究工作报告之后,1959—1960年又进一步在湖北、河南和云南等省作了研究,本文主要包括棉铃虫的世代分布带,晚秋、冬春活动情况,不同饲料对生长发育的影响,成虫对寄主植物的选择,成虫和幼虫活动的规律性,大发生的特点和防治关键。 其发生世代大致可分四个地理带:1.40°N以北,约发生3代;2.32-40°N是4代区;3.25-32°N是5代区;4.25°N以南一般6代,个别地区7代。如化蛹后5天以上其眼域外缘的4个小斑点没有变化,即为休眠蛹。 不同食料条件对成虫和幼虫生长发育影响很大。幼虫取食植物的繁殖器官,营养良好,则死亡率低、生长快、蛹较重、成虫繁殖力也高。成虫补充营养不同,其产卵量有显著差异,喂以棉花花粉加10%蜂蜜水产卵最高,单喂10—30%蔗糖水也很好,蔗糖太浓或单喂各种花产卵都降低,喂以植物营养器官则产卵很少或不产卵。 成虫对不同寄主植物有选择性。可分为取食寄主、产卵寄主、取食兼产卵寄主。如大葱、洋葱等则仅取食而不产卵;而豌豆等是产卵寄主,未见成虫取食;棉花等以产卵为主;向日葵等则以取食为主,产卵较少。成虫产卵对棉株生长势也有选择,一般棉株生长茂盛,颜色浓绿、组织幼嫩、蕾、花和嫩...

继续1958年棉铃虫研究工作报告之后,1959—1960年又进一步在湖北、河南和云南等省作了研究,本文主要包括棉铃虫的世代分布带,晚秋、冬春活动情况,不同饲料对生长发育的影响,成虫对寄主植物的选择,成虫和幼虫活动的规律性,大发生的特点和防治关键。 其发生世代大致可分四个地理带:1.40°N以北,约发生3代;2.32-40°N是4代区;3.25-32°N是5代区;4.25°N以南一般6代,个别地区7代。如化蛹后5天以上其眼域外缘的4个小斑点没有变化,即为休眠蛹。 不同食料条件对成虫和幼虫生长发育影响很大。幼虫取食植物的繁殖器官,营养良好,则死亡率低、生长快、蛹较重、成虫繁殖力也高。成虫补充营养不同,其产卵量有显著差异,喂以棉花花粉加10%蜂蜜水产卵最高,单喂10—30%蔗糖水也很好,蔗糖太浓或单喂各种花产卵都降低,喂以植物营养器官则产卵很少或不产卵。 成虫对不同寄主植物有选择性。可分为取食寄主、产卵寄主、取食兼产卵寄主。如大葱、洋葱等则仅取食而不产卵;而豌豆等是产卵寄主,未见成虫取食;棉花等以产卵为主;向日葵等则以取食为主,产卵较少。成虫产卵对棉株生长势也有选择,一般棉株生长茂盛,颜色浓绿、组织幼嫩、蕾、花和嫩叶多则产卵多,反之则少。 成虫昼夜活动有一定规律性,从飞翔看来,可分为三个主要阶段:黄

 
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