助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   nymph 在 植物保护 分类中 的翻译结果: 查询用时:0.012秒
图标索引 在分类学科中查询
所有学科
植物保护
林业
生物学
园艺
农业基础科学
蚕蜂与野生动物保护
基础医学
更多类别查询

图标索引 历史查询
 

nymph
相关语句
  若虫
    The Characteristics and Applications of The Distribution Pattern Parameters of Low Instar Nymph of Sogatella Furcifera in Rice Fields
    白背飞虱低龄若虫空间分布参数的特征及应用
短句来源
    1.The forecast results to the adult and high-instar nymph were similar to the results in forest investigation, and the coefficient is 0.9899 and 0.9946.
    在两样地,第一世代各虫态的发生期预测结果与实际发生情况相吻合,高龄若虫和成虫预测值经修正后与实测值之间吻合度很高,相关系数分别为0.9899和0.9946。
    STUDIES ON THE DISTRIBUTION OF WHITEFLY NYMPH ON SUMMER SOYBEAN PLANTS
    烟粉虱若虫在夏大豆植株上分布的研究
短句来源
    The threshold temperature for nymph development is 10.07 ±2.55℃ and requires 267.79±64.81 degree-days to complete development.
    若虫的发育起点温度为10.07±2.55℃,有效积温267.79±64.81日度。
短句来源
    The developmental thresholds of Egg, Nymph (1st intar to 2nd instar),Nymph(3rd instar to 4th instar) and the whole generation were 11.49? , 10.51 , 8.16 , 10.80 , respectively, and the thermal constants were 58.33DD, 60.36DD, 101.67DD, 218,17DD respectively.
    结果表明,棕榈蓟马的卵、低龄若虫、高龄若虫、全世代的发育起始温度分别为11.49℃、10.51℃、8.16℃、10.80℃,有效积温分别为58.33DD、60.36DD、101.67DD、218.17DD。
短句来源
更多       
  “nymph”译为未确定词的双语例句
    To understand the effects of potassium nutrition of host-plant on the duration, survivorship, nymph body size and adult host selection of Bemisia tabaci, we conducted experiments with different potassium concentrations, K0(0 mg/L), K30(30 mg/L), K60(60 mg/L), K120(120 mg/L) and K240 (240 mg/L).
    为了探讨寄主钾营养对烟粉虱发育、存活和寄主选择的影响,设置了K0(0mg/L)、K30(30mg/L)、K60(60mg/L)、K120(120mg/L)和K240(240mg/L)5种不同钾浓度,研究了烟粉虱在不同处理黄瓜上的发育历期、存活率、体形以及成虫的寄主选择。
短句来源
    Screening pesticides for thrips control on water nymph in the Shanghai flower port
    上海鲜花港睡莲花期蓟马的防治药剂筛选
短句来源
    1.25>( I O spores/mi, to nymph of grasshoppers 1.75 X i0 spores/mi. The third-fourth instarnymph of grasshoppers was the most effective control period.
    试验说明1.25×10~9孢子/ml的处理可作为成虫田间防治试验的使用浓度、1.75×10~7孢子/ml的油剂浓度更适合用于蝗蝻的大田防治,3~4龄为草原蝗虫的最佳防治虫态。
短句来源
    WCME-11 activity against female mite was 1.53 times against WCME-7, but WCME-11 activities against egg and nymph were lowered 38.05% and 40.38% respectively, which indicated that WCME-7 and WCME-11 have different active constitutes and actions.
    WCME-11 对成螨的活性为WCME-7 的1.53 倍,但对卵和若螨的毒力要比WCME-7 低38.05%和40.38%,说明两个流份所含活性成分的作用方式与机理有所不同。
短句来源
    All of which, the best of contact action against adult T. cinnabarinus among three monomers was BDMC and the LC_50 at 24h and 72h was 1.1755 and 0.3789 g-L'1, respectively. The general tendency of contactaction against nymph T.
    其中24h和72h三种单体化合物对朱砂叶螨成螨触杀活性最高者为双去甲氧基姜黄素,其LC_(50)分别为1.1755和0.3789 g·L~(-1)。
短句来源
更多       
查询“nymph”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
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。
  nymph
Description of the nymph of a Caucasian stonefly, Taeniopteryx caucasica Zhiltzova (Plecoptera, Taeniopterygidae)
      
The nymph of Taeniopteryx caucasica is described and illustrated for the first time.
      
The geological age and stratigraphical correlation of the nymph-bearing strata are briefly reviewed.
      
The completion of epimorphosis of the pedipalps followed at nymph IV stage (after four post-larval moults) that of the walking appendages in most cases at nymph V stage (after five post-larval moults).
      
Thus, for the first instar nymph the conversion ratio wsa 62.6% when food was limited and 44.3% when food was plentiful.
      
更多          


The present paper gives a report on the observations of the citrus psylla, Diaphorina citri Kuwayama, found in Focchow and Changchow of Fukien Province. The insect has been reported as an important citrus pest in south-eastern Asia, and is heretofore recorded from Kwangtung by Hoffmann (1936) and from Taiwan by Shiraki (1934). The citrus psylla attacks l3 species of plants of the family Rutaceae. Eggs are laid on the leaves of the young growth. The feeding of both the nymphs and adults on foliage of the...

The present paper gives a report on the observations of the citrus psylla, Diaphorina citri Kuwayama, found in Focchow and Changchow of Fukien Province. The insect has been reported as an important citrus pest in south-eastern Asia, and is heretofore recorded from Kwangtung by Hoffmann (1936) and from Taiwan by Shiraki (1934). The citrus psylla attacks l3 species of plants of the family Rutaceae. Eggs are laid on the leaves of the young growth. The feeding of both the nymphs and adults on foliage of the new terminal growth results in the leaves, becoming thick and leathery. The leaves and the young shoots are usually distorted, dwarfed, or in severe cases, even dried. The annual life cycle of the insect in Fukien Province has not been investigated thoroughly. However, preliminary observations made during the year of 1952 show that different developmental tsages of citrus psylla could be found all the year round. There is no marked phenomenon of hibernation. Concentration of a number of adults on the same leaf usually occurs during the winter months. Both nymphs and adults become very abundant in April when dam- ages are most severe. Sixteen days are required for the insect to complete a generation in August. The number of individuals de- creases after September. The nymphs are attacked heavily by three species of chalcid parasites of the family Encyrtidae. Morphological descriptions of the different stages of the insect are also given in this paper.

柑桔木虫分布于亚洲东南的热带和亚热带地区,为害芸香科植物,是柑桔类主要害虫之一。国内除台湾、广东外,其他各地尚无报告。现知福建的福州、漳州也都有,本文系在福州观察的记述。成虫栖息取食常在芽和叶里的叶脉上。产卵于嫩芽,若虫孵化后就在新梢为害。被害叶芽枯干,枝梢萎缩,新叶畸形卷曲。生活史尚待详细研究,但根据一年来的初步观察,一年到头都可以找到各个虫期;自四月以后为害渐见严重,至九、十月则逐渐减少。夏季完成一个世代约需十六天。冬季多以成虫密集叶里,但无休眠迹象。育得跳小蜂科寄生蜂三种,九月至十一月若虫被寄生者甚多。本文对于柑桔木虫各期形态有简略的叙述。

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...

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。

The Delphacodes striatella F., is widely distributed in Soochow, Wusih, Changchowof the Taihu Lake rice region in Kiangsu. It is one of the worst pests of our rice crop.The crops from the double cropping early rice and single cropping middle rice are injuredeven more severely. By our observations, the host plant of this small brown planthopper is changedseasonally. The most common hosts are rice in summer or autumn and wheat, Alope-curus aequalis Sobol. in spring or winter. Supplementary hosts include barley,...

The Delphacodes striatella F., is widely distributed in Soochow, Wusih, Changchowof the Taihu Lake rice region in Kiangsu. It is one of the worst pests of our rice crop.The crops from the double cropping early rice and single cropping middle rice are injuredeven more severely. By our observations, the host plant of this small brown planthopper is changedseasonally. The most common hosts are rice in summer or autumn and wheat, Alope-curus aequalis Sobol. in spring or winter. Supplementary hosts include barley, Leersiajaponica Makino, Zoysia japonica Steud., etc. According to the degree of embryonic development the growth of the egg is dis-tinguished in six stages, such as: Blastoderm, Germ band, Yellow spot, Blastokinesis,Eye spot, Accessory-podite and Hatching. The development of nymph goes through about five instars, it becomes adult afterthe fifth moult. The period of each stage is limited by temperature. At 25--26℃, theegg stage is about eight days, the nymph stage is about sixteen days, the adult is aboutfourteen days, the adult is about seven days. The sexual muturation period of the Brachypterous type is 1--2 days earlier than theLongipennate. The female copulates with the male immediately. The eggs are depositedinto the leaf sheath or beside the leaf mid-rib. The egg streak consists of double rowof eggs. Delphacodes striatella F. produces six generations per year. The first generation isfrom late April to early July. The second generation is from early June to early July.The third generation is from early July to August. The fourth generation is from earlyAugust to middle September. The fifth generation is from early September to middleOctober. The nymph of the sixth generation hatches in early October. During the3rd and 4th instars it hibernates on wheat, alfalfa or weeds. The activity of hymenpterous parasites, nematodes and spider in June and July sup-presses the multiplication of the small brown planthopper. The difference of the popula-tion in some regions or in the field is closely related to the nutrition of the host and themicroclimate. The results of laboratory and field tests indicated that: spraying 6% γ wettableB.H.C. (1:200), 46.6& Folidol (1:3000) and 15% wettable Malathion (1:1500) at100 kg of the solutions per mou, gave very successful control.

1.灰稻虱是苏南稻区每年普遍发生为害和暴发年猖獗成灾的主要害虫。由于其早在6—7月间已进入全年发生盛期,故对双季早稻和单季中稻的为害特别严重。 2.该虫的主要寄主 夏秋季为水稻Oryza sativa L.,冬春季为小麦Triticum aestivum L.、看麦娘Alopecurus aequalis Sobol.。其它寄主有稗Echinochloa crus-galli Beauv.、李氏游草Leersia japonicaMakino等十种。 3.灰稻虱在苏南稻区一年发生六代。发生时期:第一代为4月下旬—6月上旬,第二代为6月上旬—7月上旬,第三代为7月上旬—8月上旬,第四代为8月上旬—9月中旬,第五代为9月上旬—10月中旬,第六代若虫在10月上、中旬孵化,11月上、中旬以3—4龄若虫于麦田、紫云英田或沟埂杂草处越冬,翌年3月中旬—4月中旬化为成虫。 4.灰稻虱在水稻田内的消长峰态可以分为“双峰”和“单峰”两种。高峰的出现期一般总是在水稻营养状况良好的分蘖盛期和孕穗期。 5.早夏发生量的多寡,除与水稻早期栽培的面积和营养状况密切有关外,还与冬前虫口基数和1—3月间的气温等综合因子有关。6—7月间,寄生...

1.灰稻虱是苏南稻区每年普遍发生为害和暴发年猖獗成灾的主要害虫。由于其早在6—7月间已进入全年发生盛期,故对双季早稻和单季中稻的为害特别严重。 2.该虫的主要寄主 夏秋季为水稻Oryza sativa L.,冬春季为小麦Triticum aestivum L.、看麦娘Alopecurus aequalis Sobol.。其它寄主有稗Echinochloa crus-galli Beauv.、李氏游草Leersia japonicaMakino等十种。 3.灰稻虱在苏南稻区一年发生六代。发生时期:第一代为4月下旬—6月上旬,第二代为6月上旬—7月上旬,第三代为7月上旬—8月上旬,第四代为8月上旬—9月中旬,第五代为9月上旬—10月中旬,第六代若虫在10月上、中旬孵化,11月上、中旬以3—4龄若虫于麦田、紫云英田或沟埂杂草处越冬,翌年3月中旬—4月中旬化为成虫。 4.灰稻虱在水稻田内的消长峰态可以分为“双峰”和“单峰”两种。高峰的出现期一般总是在水稻营养状况良好的分蘖盛期和孕穗期。 5.早夏发生量的多寡,除与水稻早期栽培的面积和营养状况密切有关外,还与冬前虫口基数和1—3月间的气温等综合因子有关。6—7月间,寄生蜂、线虫和蜘蛛类等天敌的活动,对灰稻虱的增殖也有一定的抑制作用。 6.个体发育中,卵期还可凭胚胎发育的特征划分为胚盘、胚带、黄斑、反转、眼点、附肢形成和孵化等七期。各虫?

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关nymph的内容
在知识搜索中查有关nymph的内容
在数字搜索中查有关nymph的内容
在概念知识元中查有关nymph的内容
在学术趋势中查有关nymph的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社