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life cycle and habit
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  生活史和习性
     Distribution, host,life cycle and habit of Locastra muscosalis walker in Guizhou province are described and control measures suggested.
     论述了缀叶丛螟 (L ocastra muscosalis Walker)在贵州的分布、寄主、生活史和习性 ,并提出了相应的防治措施
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     The harm of striped flea-beetle to rape was more and more seriously in haixi of Qinghai in recent years,the life cycle and habit were grasped by observation and investigation and the control countermeasure were put forward.
     近年来黄曲条跳甲对青海省海西地区油菜作物危害越来越严重,通过观测调查,掌握了黄曲条跳甲的生活史和习性,并提出防治对策。
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  “life cycle and habit”译为未确定词的双语例句
     Study On life cycle and habit of Carposind niponesis
     李子桃小食心虫生活史及其习性研究
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     A new pest of Cycnortrachelus Henan xinyi and its morphological characteristics, life cycle and habit, symptoms and treatment measures were reported in this paper.
     本文报道了河南辛夷一种新害虫──辛夷卷叶象甲的形态特征、生活史、生活习性、危害症状及其防治措施。
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  相似匹配句对
     Cycle of Life
     生命的轮回(英文)
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     On the Life Cycle of Enterprise
     论企业生命周期
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     Life
     生活(英文)
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     Life
     生命
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     Life Cycle and Lifelong Sport(I)
     生活周期与终身体育(一)——终身体育及其在生活周期中的特点
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(1) Euonymus geometer, Abraxas miranda (Butler), is one of the principal garden pests inShanghai, infesting, in particular, Euonymus japonicus Thumb and E. Fortunei Hand-Mazz.,Celastraceae. In China, its distribution includes the provinces of Kiangsu, Chekiang and Kwei-chow as well as some northeastern provinces. (2) Investigations in Shanghai reveal that three generation of euonymus geometer occur inthe course of a year, with the pupa surviving the winter underground. Adults of the first genera-tion start emerging...

(1) Euonymus geometer, Abraxas miranda (Butler), is one of the principal garden pests inShanghai, infesting, in particular, Euonymus japonicus Thumb and E. Fortunei Hand-Mazz.,Celastraceae. In China, its distribution includes the provinces of Kiangsu, Chekiang and Kwei-chow as well as some northeastern provinces. (2) Investigations in Shanghai reveal that three generation of euonymus geometer occur inthe course of a year, with the pupa surviving the winter underground. Adults of the first genera-tion start emerging in the first half of April and the larvae of third generation go undergroundto enter into pupa stage in the middle of November. During this period the larvae infest theleaves of Euonymus japonicus Thumb and E. Fortunei Hand-Mazz. (3) This report deals with the life cycle and habits of this pest. It also includes data rela-tive to the horizontal and vertical distribution densities of its winter pupa. The horizontal dis-tribution density is highest in places just under the plant-stems, reaching 37.8-53.3%, while inplaces about 1 ft beyond the stems, no pupa is to be found. Its vertical distribution density ishighest in places 2 mm from the ground surface, ranging from 37.5% to 45.1%, while below5 mm no pupa has been found. (4) Chemical control experiments have been carried out in the laboratories. The results ofthese experiments show: (a) 10% DDT powder is fully capable of exterminating larvae of all stages; (b) 5% DDT powder registers 95% mortality when treated against olders larvae; (c) 1/1000 dipterex solution registers 97.5% mortality when treated against the larvae of laterstages; (d) 1/2500 dipterex solution registers 100% mortality when treated against larvae of 2-3stages; 78.4% against larvae of later stages; (e) 1/150, 1/200 and 1/300 solution of lead arsenate effects only low mortality. On the basis of the data on the horizontal and versical distribution densities of the over-wintering pupa as reported here, it is recommended that steps should be taken to unearth andesterminate the winter pupa in combination with the anti-four-pests campaign in the winter. Inview of the poor flying ability of the adult, it is also recommended that survey should be madeto ascertain the growth data of the adults of the first generation and exterminate them whenthey start emerging. The survey should be made on basis of past records and the weather condi-tion of the current year.

一、大叶黄杨尺蠖(Abraxas miranda Butler)是重要的园林害虫之一,为害卫矛科的两种植物,即:大叶黄杨与爬行卫矛。在中国分布于江苏、浙江、贵州及东北等地。 二、大叶黄杨尺蠖在上海一年发生三代,但在室内饲育可完成四代,以蛹在土中越冬。第一代成虫自4月上旬开始羽化,幼虫自4月下旬开始为害,至5月下旬进入蛹期。第二代成虫自6月上旬开始羽化,幼虫自6月中旬开始为害、直至8月下旬进入蛹期。第三代成虫自8月中旬开始羽化、幼虫自9月上旬开始至11月中旬进入蛹期。 三、根据室内饲养,成虫的寿命第一代雄虫平均7.8天,雌虫平均9.6天;第二代雄虫平均11天,雌虫平均15.4天;第三代雄虫平均9天,雌虫平均10天;第四代雄虫平均12天,雌虫平均14.5天。卵期第一代为14.5天,第二代8.6天,第三代9天,第四代12天。幼虫期第一代平均34.9天,第二代平均23.4天,第三代平均25天,第四代平均58天。蛹期第一代平均11.4天,第二代平均45.8天,第三代平均15.9天,第四代为越冬蛹。 四、成虫飞行力很弱,白天栖息在大叶黄杨树下或附近草丛中,晚上活动,趋光性不强。成虫羽化多在下午3—5时,羽化后即可交尾,一...

一、大叶黄杨尺蠖(Abraxas miranda Butler)是重要的园林害虫之一,为害卫矛科的两种植物,即:大叶黄杨与爬行卫矛。在中国分布于江苏、浙江、贵州及东北等地。 二、大叶黄杨尺蠖在上海一年发生三代,但在室内饲育可完成四代,以蛹在土中越冬。第一代成虫自4月上旬开始羽化,幼虫自4月下旬开始为害,至5月下旬进入蛹期。第二代成虫自6月上旬开始羽化,幼虫自6月中旬开始为害、直至8月下旬进入蛹期。第三代成虫自8月中旬开始羽化、幼虫自9月上旬开始至11月中旬进入蛹期。 三、根据室内饲养,成虫的寿命第一代雄虫平均7.8天,雌虫平均9.6天;第二代雄虫平均11天,雌虫平均15.4天;第三代雄虫平均9天,雌虫平均10天;第四代雄虫平均12天,雌虫平均14.5天。卵期第一代为14.5天,第二代8.6天,第三代9天,第四代12天。幼虫期第一代平均34.9天,第二代平均23.4天,第三代平均25天,第四代平均58天。蛹期第一代平均11.4天,第二代平均45.8天,第三代平均15.9天,第四代为越冬蛹。 四、成虫飞行力很弱,白天栖息在大叶黄杨树下或附近草丛中,晚上活动,趋光性不强。成虫羽化多在下午3—5时,羽化后即可交尾,一般交尾时间为6—7小时,最长可达11小时,交尾后7小时即行产卵,每一雌蛾可产卵360余粒。 五、幼虫共五龄,羽化后3、4小时就开始取食,受?

There is a wide distribution of cotton bollworm(Heliothis armigera Hubner) and tobacco budworm(Heliothis assulta Quenee) in the world. They are important insect pests attacking cotton, tobacco and some kinds of vegetables in China. The damage caused by these two pests has become increasingly serious in recent years. Some problems, such as host, external anatomy, life cycle and habits of them, have not been known clearly. The present paper deals with the results Obtained from the laboratory rearing...

There is a wide distribution of cotton bollworm(Heliothis armigera Hubner) and tobacco budworm(Heliothis assulta Quenee) in the world. They are important insect pests attacking cotton, tobacco and some kinds of vegetables in China. The damage caused by these two pests has become increasingly serious in recent years. Some problems, such as host, external anatomy, life cycle and habits of them, have not been known clearly. The present paper deals with the results Obtained from the laboratory rearing experiments and field investigations that were carried out during the years of 1980-1983 in Taian, Shandong, but some of these results are different from the conclussions drawn by any other research workers in the past. The results obtained are summarized as follows:Both cotton bollworm and tobacco budworm have four generations each year and the larva has six instars. Under the laboratory conditions, cotton bollworm requires 30 days(25.5-26.4℃ in average)to finish one generaton, whereas the tobacco budworm requires 40 days.The host plants of cotton bollworm are mainly cotton, corn, wheat, soybean, peanut, tomato and tobacco, only a few individuals of cotton bollworm can feed on hot pepper. The tobacco budworm can feed on tobacco, hot pepper, amaranthts and tomato.Having observed many larvae of these two kinds of pests, we found that both of them have some individuals with similar link linof hair 4 and 5, which can pass the spiracle in the lateral of prptes horax, therefore we can not distinguish cotton bollworm, larva from tobacco budworm larva according to this feature which many people often used. We also observed that adults of these two kinds of pests do not mate each other.

室内饲养,认为棉冷虫完成一代所需时间较烟青虫略短,在室内均温25.5—26.4℃下,棉铃虫经30天左右即可完成一代,而烟青虫则需40天左右。通过田间系系调查,棉铃虫寄主植物种类明显多于烟青虫,前者主为害棉、小麦、玉米、大豆、花生、番茄、烟草等,辣椒田内也有少量幼虫;后者主要为害烟草、辣椒、番茄等植物。对两种幼虫作了前胸4、5毛连线与气门关系的观察,发现在连线与气门相切、相交、远离方面,都各有一定虫量,更加特殊的是,在一头幼虫的前胸左、右两侧、尚有不同,所以认为和用这一特征区别两种幼虫,是不可靠的。室内饲养作两种幼虫的互相交尾试验,在正交(棉铃虫雌,烟青虫雄)与反交(烟青虫雌,棉铃虫雄)中,均未发现有交尾现象,所产的卵也全部未受精,但作为对照的自交饲养结果,均能正常进行交尾,产卵、孵化、发育。

A new pest of Cycnortrachelus Henan xinyi and its morphological characteristics, life cycle and habit, symptoms and treatment measures were reported in this paper.

本文报道了河南辛夷一种新害虫──辛夷卷叶象甲的形态特征、生活史、生活习性、危害症状及其防治措施。

 
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