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食幼虫
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  “食幼虫”译为未确定词的双语例句
     130 unfed lar- vae of L. scutellare were collected by the black plate method.
     小黑板法诱集共130只小盾纤恙螨未食幼虫
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  相似匹配句对
     Adults and larva preyed on many kinds of Lepidoptera larvae.
     成、幼虫以多种鳞翅目幼虫
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     Studies on Amount of Leaf Ate by Larves of Dendrolimus latipennis
     柳杉毛虫幼虫叶量的研究
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     Delicious food in Guangzhou
     在广州
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     LARVAL DEVELOPMENT OF POLLICIPES MITELLA(CIRRIPEDIA:SCAPELLIDAE)
     龟足的幼虫发育
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     3. The place of over-wintering larva:The place of over-wintering larva is investigated.
     3.幼虫越冬场所
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  larvivorous
Effect of running water on the predatory efficiency of the larvivorous fish Gambusia affinis
      
Effects of standing and running water on the predatory efficiency of the larvivorous fish Gambusia affinis was tested at 6 different current speed: 0.0, 0.8, 2.4, 4.5, 8.5 and 10.2 ml/sec.
      
Influence of certain environmental factors on the predatory efficiency of the larvivorous fishMacropodus cupanus
      
Comparative analyses suggest that the dragonfly nymphs deserve serious consideration as larvivorous predators.
      
Larvivorous fishes fail to control mosquitoes in experimental rice plots
      
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Department of parasitology, First Shanghai Medical College The damages that chickens and other poultry suffer from the infestation of Neoschongastia gallinarum larvae are quite serious. It has been found, according to our surveys made since 1954, that N. gallinarum is widely distributed in this country and the infestation rate among the fowls and other land birds is very high. The present paper is a preliminary report on the study of the effects of temperature and moisture on the viability of N. gallinarum larvae...

Department of parasitology, First Shanghai Medical College The damages that chickens and other poultry suffer from the infestation of Neoschongastia gallinarum larvae are quite serious. It has been found, according to our surveys made since 1954, that N. gallinarum is widely distributed in this country and the infestation rate among the fowls and other land birds is very high. The present paper is a preliminary report on the study of the effects of temperature and moisture on the viability of N. gallinarum larvae under the conditions established in the laboratory. N. gallinarum larvae persist to live: (1) 18±1℃ & RH 73% for 26 hours and 20 minutes; (2) 26—29℃ & RH 50—52% for 12 hrs.;(3) 34±1℃ RH 50% for 9 hours; (4) 40±1℃ & RH 45% for 5 1/2 hrs.; (5) 45±1℃ & RH 37% for 2 hrs. and 40 mins.; (6) 50±1℃ & RH 34% for 100 mins.; (7) 56±1℃ & RH 30% for 40 mins.; (8) 61±1℃ & RH 28.5% for 10 mins. Besides, when kept in water, unengorged A. gallinarum larvae were found to survive in the temperature of 28±1℃, 34±1℃, 40±1℃, 50±1℃, 56±1℃, 61±1℃, 65±1℃; for 77 days, 29 days, 26 days, 10 hrs., 40 mins., 40 mins, and 20 mins, respectively. Furthermore the development of the larva to nymphal stage was observed in the above stated temperature especially in the temperature below 40±1℃. N. gallinarum larvae is comparatively resistant to freezing temperature. It is viable in temperatures of 0℃, -5℃, -10±1℃ for 32, 23 and 3 days respectively. With reference to the adaptation of the N. gallinarum larvae toward sudden changes of temperature, the distribution, the epidemiology, as well as the prevention of the "chicken chigger pox" are concisely discussed in this paper.

1.本文就鸡新勋恙螨幼虫在不同温湿度,不同温度的水,及低温等不同环境中的生活力作一初步研究。 2.鸡新勋恙螨幼虫在18±1℃,相对湿度73%;26—29℃,相对湿度50—52%;34±1℃,相对湿度50%;40±1℃,相对湿度45%;45±1℃,相对湿度37%;50±1℃,相对湿度34%;56±1℃;相对湿度30%;61±1℃,相对湿度28.5%时分别可活26小时20分;12小时;9小时;5 1/2小时;2小时40分;100分;40分;10分。说明幼虫有相对的抗旱性能。 3.鸡新勋恙螨幼虫在28±1℃;34±1℃;40±1℃;50±1℃,56±1℃;61±1℃;65±1℃的水中,未饱食的幼虫分别可活77天;29天;26天;10小时;40分;40分;20分钟。幼虫虽然在上列的温度中或经过該温度处理后尚能具有发育为稚虫的能力,尤以40±1℃以下为显见,由此可知幼虫对高湿度适应的性能。 4.鸡新勋恙螨幼虫在0℃;-5℃;-10±1℃时分别可活32天;23天;3天。也说明了它的御寒能力。 5.基于上述的秸果,鸡新勋恙螨幼虫都是在室温中迅速转变为高温或低温的情况下就产生这样快的适应力,故就它在鸡螨痘病的流行、发生及防治...

1.本文就鸡新勋恙螨幼虫在不同温湿度,不同温度的水,及低温等不同环境中的生活力作一初步研究。 2.鸡新勋恙螨幼虫在18±1℃,相对湿度73%;26—29℃,相对湿度50—52%;34±1℃,相对湿度50%;40±1℃,相对湿度45%;45±1℃,相对湿度37%;50±1℃,相对湿度34%;56±1℃;相对湿度30%;61±1℃,相对湿度28.5%时分别可活26小时20分;12小时;9小时;5 1/2小时;2小时40分;100分;40分;10分。说明幼虫有相对的抗旱性能。 3.鸡新勋恙螨幼虫在28±1℃;34±1℃;40±1℃;50±1℃,56±1℃;61±1℃;65±1℃的水中,未饱食的幼虫分别可活77天;29天;26天;10小时;40分;40分;20分钟。幼虫虽然在上列的温度中或经过該温度处理后尚能具有发育为稚虫的能力,尤以40±1℃以下为显见,由此可知幼虫对高湿度适应的性能。 4.鸡新勋恙螨幼虫在0℃;-5℃;-10±1℃时分别可活32天;23天;3天。也说明了它的御寒能力。 5.基于上述的秸果,鸡新勋恙螨幼虫都是在室温中迅速转变为高温或低温的情况下就产生这样快的适应力,故就它在鸡螨痘病的流行、发生及防治等方面加以分析和探讨。

1. Hibernation of chigger mites was observed under laboratory conditions.2. The larvae, nymphochrysalis and nymphs of Neoschongastia gallinarum can hibernateat an average temperrature of -10℃. The time required for hibernation is around fourmonths.3. The hibernating larvae, nymphochrysalis and nymphs possess different biologicalphenomena, which can be summarized into four groups.1. Larvae hibernation Jarvae.2. Fully engorged larvae hibernation fully engorged larvae non-feeding nym--ochrysalis nymphs (larvae-...

1. Hibernation of chigger mites was observed under laboratory conditions.2. The larvae, nymphochrysalis and nymphs of Neoschongastia gallinarum can hibernateat an average temperrature of -10℃. The time required for hibernation is around fourmonths.3. The hibernating larvae, nymphochrysalis and nymphs possess different biologicalphenomena, which can be summarized into four groups.1. Larvae hibernation Jarvae.2. Fully engorged larvae hibernation fully engorged larvae non-feeding nym--ochrysalis nymphs (larvae- hibernation nymphs).3. Nymphochrysalis hibernation nymphochrysalis nymphs (nymphochrysalishibernation nymphs).4. Nymphs hibernation nymphs.4. The percentage of transformation of hibernating larvae into nymphs and nympho-chrysalis into nymphs, and the percentage of nymphs that hibernate are 90.3%; 64.6%;82.4% respectively.5. The length of life of Neoschongastia gallinarum hibernating larvae varies from119--130 days and of hibernating nymphs is 268 days. The length of life of both hiberna-ting larvae and nymphs is longer than the non-hibernating ones.6. Under the same conditions and with the same stages, it is found that Trombicula(Eutrombicula) wichmanni has no ability to hibernate.7. On the basis of the results of the present investigation and the summary of theliterature, the problem of hibernatiom of chigger mites is thoroughly discussed. It is con-cluded that any stage in the life history of the mites, including egg, larva, nymphochrysalis,nymph, imagochrysalis and imago can under go hibernation.

1.本文是在实验条件下观察恙螨越冬的初次报告。 2.在冬季平均气温10℃以下,证明鸡新勋恙螨能以幼虫、若蛹(若虫前期)和若虫期越冬。越冬所需时间在4个月左右。 3.越冬的幼虫、若蛹和若虫具有不同的生物学性状,可以归纳为4类: (1)幼虫→(越冬)幼虫。 (2)饱食幼虫→(越冬)饱食幼虫→(未经取食)若蛹→若虫(幼虫→(越冬)若虫)。 (3)若蛹→(越冬)若蛹→若虫(若蛹→若虫)。 (4)若虫→(越冬)若虫。 4.越冬后的幼虫孵出若虫、若蛹孵出若虫和若虫率各为90.3%;64.6%和82.4%。 5.鸡新勋恙螨越冬幼虫的寿命为119—130天;越冬若虫的寿命可长达268天。不论越冬的幼虫或若虫,其寿命均较当年生(未越冬)者为长。 6.威氏恙螨在用同样的虫期和相似条件下,概不能越冬。 7.通过本试验的观察,将有关的文献加以复习,对恙螨的越冬问题予以探讨。并认为恙螨生活史中的各个阶段包括卵、幼虫、若蛹、若虫、成蛹和成虫都有越冬的可能。

(Cirsium setosum)

两年来試驗研究和大面积防治調查資料表明:在小地老虎一龄盛期时(4月25日左右),田間杂草(小薊)密度大、栖食的幼虫数量多,当幼虫尚未向玉米上迁移之前,充分发揮除草的作用,可以減少田间虫群密度,減輕玉米受害。小地老虎一龄盛期是除草防治的最适时期。适期除草防治的效果与撒6%六六六毒土和噴5%二二三粉剂的防治效果不相上下,4月下旬除草減少死苗(断茎),效果达到45.83—58.5%,除草結合噴药有增效作用,減少死苗效果达到73.9%。除草防治具有农业防治的优点,經济有效、簡单易行。

 
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