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bark
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  树皮
    Test of Controling Rubber Bark Canker with Gemianbao
    割面宝控制橡胶树树皮溃疡病扩展试验
短句来源
    The female moth always laid eggs to the crevice and wound in stem bark, the hatching rate of the egg is 90% and egg stage is 16d.
    卵集中产在干部树皮裂缝、伤口等处,孵化率达90%以上,卵期16d。
短句来源
    2) The poplar resistance to the insect bears no relation to the inorganicchemical components in poplar bark and oxlyn.
    2)杨树的抗虫性与无机化学成分含量之间无规律可循,各种杨树树皮及木质部的无机元素含量与其抗虫或感虫程度无关。
短句来源
    The fiber proportion of bark about 30-50% and it was positive related to the tree age while negatively to the disease index.
    (5)树皮的纤维比量在30-50%之间,与树龄呈较强的正相关,与感病指数则呈较强的负相关。
短句来源
    The average diameter and average bark thickness of the attacked trunks are 5.0 cm (3.5—8.0cm) and 0.5cm (0.1—0.2cm) respectively.
    虫害木最小被害树径及树皮厚度分别为5.0cm(3.5—8.0cm)和0.15cm(0.1—0.2cm)。
短句来源
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    STUDY ON FORECAST TECHNIQUE OF BARK NECROSIS OF POPLARS
    杨树烂病测报技术的研究
短句来源
    The main results are as follows: Taking different separating culture medium and isolating methods, 68 strains of endophytic fungus and 13 strains of actinomycetes were separated from the bark, phloem and xylem of the roots and stalks of Celastrus angulatus.
    1.采用组织块法和匀浆法,以马铃薯葡萄糖培养基、苦藤煎汁培养基为内生真菌分离用培养基,高氏一号培养基、牛肉膏蛋白胨培养基为内生放线菌分离用培养基,从苦藤根和茎的表、韧部和木质部中分离得到81株内生菌,其中内生真菌68株,内生放线菌13株。
短句来源
    Sugar solution, the extract of the host's bark, pH 4 or pH 8, naturally diffused light and some ultraviolet light are beneficial to the germination of conidia and ascospore.
    糖液、寄主液、pH4或pH8,自然散射光和紫外光有利于分生孢子和子囊孢子萌发。
短句来源
    The teleomorph of the pathogen causing swollen stem canker of poplar was first found on the diseased bark of Populus simonii×nigra in Zhaodong City and Jiagedaqi City in 1986 and 1987. Through isolating, culturing and inoculation experiments, it is verified that the fungus is the teleomorph of Coryneum populinum Bresad.
    1986—1987年在肇东市、加格达奇市小黑杨(Populus simonii × nigra)肿茎溃疡病病上首次发现了病菌的有性型。 经分离培养与接种试验证明该菌是杨棒盘孢菌(Coryneum populinum Bresad.)
短句来源
    Considering stability, leaf and bark of scion are more suitable to be used for detection of CEVd by One-step RT-PCR.
    初步检测结果表明在接穗的嫩叶、老叶、,砧木部茎杆的老和根上都可以检测到CEVd,以接穗部叶和检出稳定性高。
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  “bark”译为未确定词的双语例句
    STUDY ON THE LARCH BARK BEETLE IPS SUBELONGATUS MOTSCH
    人工林内落叶松八齿小蠹(Tps subelongatus Motsch.)发生规律的研究
短句来源
    STUDY ON EFFECT OF SOME KINDS OF TRAPS TO TRAP SPRUCE BARK BEETLES
    几种类型诱捕器对云杉八齿小蠹引诱效果的研究
短句来源
    An Investigation on Bark Beetles of Pinus armandi in the South Slopes of the Qinling Mountains
    秦岭南坡华山松小蠹调查
短句来源
    The authors investigated the beetles living under withered and corrupted bark in Yele Nature Reserve from July to September in 2005,altogether gathered 218 specimens,and priliminarily identified 20 families.
    作者于2005年7月~9月在冶勒自然保护区对生活在干枯、腐败树皮下的甲虫进行调查研究,共采集到218号标本,初步鉴定出20个科。
短句来源
    Progress in Study on Internal Bark Necrosis of Apple Trees
    苹果粗皮病研究进展
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为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  bark
Two new C19 quassinoids 1 and 2 were isolated from the stem bark of Ailanthus excelsa along with three known quassinoids excelsin, glaucarubin and polyandrol.
      
marcopoli Obenberger), is an important bark beetle attacking ash trees (Fraxinus spp.).
      
Oligosaccharide Specificity of the Fucolectin from the Bark of Laburnum (Laburnum anagyroides)
      
In the second case, the vigor was evaluated from the size of the necrotic spot on inner bark of the tree after inoculation of 22-25 randomly chosen pines with the extract of fungus Ceratocystis laricicola Redfern and Minter.
      
The optimal separation of phenolic components of the bark of basket willow Salix viminalis L.
      
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The pine caterpiller,Dendrolimus punctatus Walker, has the habit of leav-ing the crown part of a tree and hibernating under the loose bark of thetrunk. The present paper reports the successful control of this pest by treatinga part of the trunk with a DDT suspension. All experiments were carried outat Nanking, 1947-48. When solutions and water suspension containing 5% DDT, 1%γ 666,or 5% 1068 were applied with a brush to the trunk for a width of one footand over-wintering larvae were allowed to crawl over...

The pine caterpiller,Dendrolimus punctatus Walker, has the habit of leav-ing the crown part of a tree and hibernating under the loose bark of thetrunk. The present paper reports the successful control of this pest by treatinga part of the trunk with a DDT suspension. All experiments were carried outat Nanking, 1947-48. When solutions and water suspension containing 5% DDT, 1%γ 666,or 5% 1068 were applied with a brush to the trunk for a width of one footand over-wintering larvae were allowed to crawl over the treated area, all theinsecticides tested were found to be effective when freshly applied. After oneweek, how-ever, only preparations containing DDT remained effective. DDTwater suspension was markedly better than DDT in kerosene, soybean oil, oracetone. Trees treated with a 5% DDT water suspension were still very toxic tothe caterpillars at the end of six weeks. The number of caterpillars crawling over a DDT-treated area would notinfluence the toxicity of the DDT film under practical field conditions. In oneexperiment all area of twenty inches square, treated with a 5% DDT suspension,still showed high toxicity to the caterpillars after 1,800 larvae had crawled overthe area in a period of nine days. Caterpillars were found to be more resistant to DDT in summer than inwinter. By increasing either the concentration of DDT to 10-15% or thewidth of the treated area to 2-3 feet, the "trunk treatment method" could beused as well in summer, if the caterpillars were beaten down to the grounedafter the trees had been treated with DDT. Under the field conditions in Nanking, 1947-48, the pine caterpilIars beganto leave the crown part of the trees and seek hibenation quarters in November.They became active again early in March, hence tree should he treated withDDT not later than the dates mentioned above. A total of 157,658 trees were treated with DDT on the Purple Mountain,Nanking, 1948. Examinations showed that larval population decreased 90-99%in the treated area, while in the check area an increase in population of16-350% had been observed.

本文研究在松树干上涂刷有持久性的药剂以防治越冬松毛虫的可能性。1947—48年在南京试验及实施防治的结果简述如下: (一)在实验室内使越冬松毛虫爬行越过涂有一市尺宽各种药液的松树干的结果,证明5% DDT,1%γ666,与5% 1068的悬液或溶液。在涂药的当天均 有相当高的杀虫效力,惟一周以后γ666与1068完全失效,仅DDT仍保持强大的毒力。DDT水悬液显著较DDT火油、大豆油或丙酮溶液为佳。涂有5%DDT悬液的松树杆曝露田间六星期后,杀死松毛虫能力仍达100%。 (二)据试验的结果,自制的可湿性DDT,内含DDT50%,稀释剂45%,与肥皂5%,尚适宜于防治松毛虫之用。 (三)松毛虫爬行的次数对涂药面积上DDT毒力的影响极微,在二十平方市寸涂有5% DDT悬液的小面积上,9天之内经过1800头松毛虫爬行后,毒力仍未减小,死亡率尚在90%以上。 (四)夏季松毛虫较越冬松毛虫不易杀死。夏季松毛虫抵抗DDT的能力随龄期而增强。试验中显示如增加药液浓度至含DDT 10—15%,或增加涂药的宽度至2—3市尺,夏季幼虫亦能中毒死亡。故树干涂药法亦可应用在夏季防治上,惟必须在涂药后将松毛虫从树上击落,使其在爬返树冠...

本文研究在松树干上涂刷有持久性的药剂以防治越冬松毛虫的可能性。1947—48年在南京试验及实施防治的结果简述如下: (一)在实验室内使越冬松毛虫爬行越过涂有一市尺宽各种药液的松树干的结果,证明5% DDT,1%γ666,与5% 1068的悬液或溶液。在涂药的当天均 有相当高的杀虫效力,惟一周以后γ666与1068完全失效,仅DDT仍保持强大的毒力。DDT水悬液显著较DDT火油、大豆油或丙酮溶液为佳。涂有5%DDT悬液的松树杆曝露田间六星期后,杀死松毛虫能力仍达100%。 (二)据试验的结果,自制的可湿性DDT,内含DDT50%,稀释剂45%,与肥皂5%,尚适宜于防治松毛虫之用。 (三)松毛虫爬行的次数对涂药面积上DDT毒力的影响极微,在二十平方市寸涂有5% DDT悬液的小面积上,9天之内经过1800头松毛虫爬行后,毒力仍未减小,死亡率尚在90%以上。 (四)夏季松毛虫较越冬松毛虫不易杀死。夏季松毛虫抵抗DDT的能力随龄期而增强。试验中显示如增加药液浓度至含DDT 10—15%,或增加涂药的宽度至2—3市尺,夏季幼虫亦能中毒死亡。故树干涂药法亦可应用在夏季防治上,惟必须在涂药后将松毛虫从树上击落,使其在爬返树冠时接触药剂而死亡。 (五)自然情形下,南京松毛虫在十一月即开始下树越冬,至来年三月初开始活动上树,故采用树干涂药法防治下?

The present paper gives a report on a study of the life his- tory of a destructive pest, Melanauster chinensis Forster, of citrus trees in Foochow during the years 1951 and 1952. It has been found that the adults lay eggs beginning from the last part of May until the end of July. Eggs are inserted in the bark of the tree trunk about 1. 4 inches from the ground. Incubation period lasts from 9 to 14 days. After hatching the young larvae feed under the bark for three or four months. In October they...

The present paper gives a report on a study of the life his- tory of a destructive pest, Melanauster chinensis Forster, of citrus trees in Foochow during the years 1951 and 1952. It has been found that the adults lay eggs beginning from the last part of May until the end of July. Eggs are inserted in the bark of the tree trunk about 1. 4 inches from the ground. Incubation period lasts from 9 to 14 days. After hatching the young larvae feed under the bark for three or four months. In October they bore into the wood from a place about one to two inches above the ground. Overwintering of the larvae in the burrows generally begins in November or December. They resume actti- vity in March the following year. Pupation takes place abou the middle part of April. The pupal period lasts from 18 to 20 days. After emergence the adults remain in the pupal cells in the upper part of their burrows for about five to eight days. The adults appear from the middle part of May to the middle part of August. Burrows made by the larvae under the bark as well as in the wood have been studied carefully. Recommendations have been given to improve the original technique of destroying the larvae by probing with wire.

星天牛为柑桔主要害虫之一,研究此种害虫者颇不乏人,但就所见文献中关于该虫习性的报道,多不足作为防治的有力参考。笔者有鉴及此,于一九五一至一九五二年在福州研究这一害虫的生活习性,尤其对于幼虫为害的隧道,有比较详细的观察。把果农钩杀幼虫这一防治方法的实践与理论相结合,初步掌握了幼虫在柑桔树干中钻蛀为害的规律,使过去所谓奥妙不可捉摸的钩杀技术得到了解析,同时也把这一技术从现有的水平提高了一步,希望可以为一般从事柑桔栽培工作者所掌握,成为简单易学的一件事。五月下旬至七月下旬均有成虫产卵,产卵位置平均离地面1.4寸,卵期九至十四天。幼虫孵化后即从产卵处蛀入,向下蛀食于表皮与木质部之间,其向下蛀食范围多在地面下五寸以内。一般在三、四个月后亦即在十月左右,以成熟或将成熟的幼虫,蛀入木质部内,作一隧道,准备过冬及化蛹。蛀入孔多在地面下—、二寸处。一般幼虫在十—、二月开始休眠越冬,历时约三、四个月,翌年三月以后又开始恢复活动。四月中旬开始化蛹,蛹期十八至二十天。成虫羽化后在蛹室内停留五至八天。自五月中旬至七月中旬都有成虫出现,迄八月中旬仍见有极少数成虫。幼虫所营隧道的形状、长短,都有一定的规律,文中有详细的叙述,并附有图解。

During 1955 and 1956 the pine barkbeetle, Myelophilus Piniperda L., seriously injured pine trees on the hills near by Kiang-Kan section at Hangchow, where the pine logs (firewoods)were piled for a considerable time before selling out. Most of the logs came down from Chien Teh (建德) and Zueng-An (淳安) along the Tsiang Tang River and were infested with immense number of the barkbeetle larvae. Results of study by the writers indicated that the serious infestation of pine shoots was due to spread of the beetles emerged...

During 1955 and 1956 the pine barkbeetle, Myelophilus Piniperda L., seriously injured pine trees on the hills near by Kiang-Kan section at Hangchow, where the pine logs (firewoods)were piled for a considerable time before selling out. Most of the logs came down from Chien Teh (建德) and Zueng-An (淳安) along the Tsiang Tang River and were infested with immense number of the barkbeetle larvae. Results of study by the writers indicated that the serious infestation of pine shoots was due to spread of the beetles emerged from the piles of log. The pine barkbeetle at Hangchow gave one brood a year, overwintering in pine shoots; up to late March and April they came down to the logs and dead woods in the forest, and made parent galleries between the bark and sapwood. The barkbeetle would take about a month to complete its life cycle. The results of trials and recommendations on control of the pest are given in the following: 1. Separate applications of 25% DDT emulsion, 50% wettable DDT and 6% wettable 666 on the pine logs at a rate of 1:100 dilution still gave 68%, 82% and 66% mortalities respectively on the 20th day. Therefore it was suggested that spraying any one of the above mentioned chemicals three times at 20-day intervals from late April to end of June would kill the emerged beetles. 2. To control the beetles in the pine shoots with 1: 60—1: 100 dilution of 6% wettable 666 was quite promising. 3. Flaming the pine logs or dead woods in April or May (the breeding period of the barkbeetles) for 2 minutes gave 100% mortality. Putting trap trunks in the forest and removering barks before transportation at Chien Teh and Zueng An were suggested.

1.松小蠹虫在杭州地区猖獗成災,主要是由于从錢塘江上游远來的松柴,攜带了大量的松小蠹虫幼虫而造成的;因此若能在松柴產地剝掉樹皮后,再行运輸是最有效的防治措施。2.根据初步观察此虫在杭州一年發生一代,新成虫在5月下旬到9月間为害当年生松梢;越冬成虫从3月下旬起离开越冬松梢,蛀進二年生松梢的梢端取食,并蛀入半枯死樹和衰老樹樹干或柴堆樹皮下產卵。3.为歼滅杭州地区松小蠹虫,根据試驗結果我們認为可采取下列几个措施:(1)自錢塘江上游运來的松柴在成虫未羽化前,進行噴藥,用1:100的25%DDT乳剂、50%可湿性DDT或6%可湿性666,每隔20天噴藥1次,以殺死羽化的成虫。(2)冬季1,2月间砍伐衰老松樹,在山区設置餌木誘集成虫產卵,然后集中处理,進行噴藥或燒灼。(3)新成虫的羽化盛期开始时,在松樹上噴射60—100倍的可湿性666液,毒殺为害枝梢的成虫以保护松樹生長。

 
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