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infested plants
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  为害株
     The control thresholds at the tillering stage were 1 500~1 650 egg-masses or 750~900 damagedhills perhectare,or 2~3 percent infested hills ,or 1~5 percent infested plants. Key wotds yellow stem borer; late Keng rice;
     防治指标为:分蘖期每公顷1500~1650块,或为害团每公顷750~900个,为害丛率2%~3%,为害株率1%~5%。
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  “infested plants”译为未确定词的双语例句
     The infested plants were very Like to be deficiency of Mn.
     大白菜干烧心病是由于土壤中的活性锰严重缺乏而造成的生理性病害。
短句来源
     According to the relationships between the percentage of infested plants and the yield loss, and between the percentage of the infected plants and the number of the egg masses/100 plants, the control indices (4.0, 5.5, 6.2 egg masses/100 plants) were determined for the different yields of cotton (100, 75, 50kg/mu) .
     中产田(75kg/亩左右)5.5块卵/百株; 低产田(50kg/亩左右)6.2块卵/百株,在玉米螟严重发生年份,应适当放低。
短句来源
     The percentage of infested plants was almost 100%, and infested fruits 20%—35%. It developed four generations a year in Fuzhou, the average duration of each generation was 45 days in the first, 31 days in the second, 46.5 days in the third and 8 months in the fouth i. e. Overwinter generation, respectively.
     在福州1a发生4代,平均各代历期:第1代45d,第2代31d,第3代46.5d,越冬代近8个月.
短句来源
     A fungus strain QZ? 97a collected from the infested plants of Veronica persica through individual spore isolation was identified as Colletotrichum gloeosporioides Penz .
     从波斯婆婆纳罹病植株上经单孢分离采得一菌株QZ 97a ,经鉴定为胶孢炭疽菌 (ColletotrichumgloeosporioidesPenz .) 。
短句来源
     These chemical signals are blends of volatile terpenoids among other compounds that are released by plants, leading insect to distinguish between infested and un infested plants.
     这些化学信号是一些挥发性萜类混合物 ,天敌昆虫就以此来区分受害和未受害植株。
短句来源
  相似匹配句对
     Rice plants could be infested in the seedling stage;
     水稻在秧苗期开始受侵染。
短句来源
     The infested plants were very Like to be deficiency of Mn.
     大白菜干烧心病是由于土壤中的活性锰严重缺乏而造成的生理性病害。
短句来源
     Phytochrome of plants
     植物的光敏色素
短句来源
     Plants And People
     植物与人
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  infested plants
The ponderal yields of the infested plants and their total free amino acid contents have also been evaluated.
      
In the aphid-infested houses, the parasitoids soon gathered on the most heavily infested plants (500-1000 aphids per plant), while the aphid-free and low-infested plants (50-200 aphids per plant) were almost free from parasitoids.
      
lopezi which had been previously exposed to infested plants.
      
We therefore tested the attractivity of uninfested leaves from partly infested plants, and found that these were indeed attractive.
      
There was a significant positive correlation between number of insect-days causing severe damage (tolerance) and regrowth of infested plants.
      
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The damage of cotton by Aphis gossypii Glov.is varied with thelevel of aphis infestation,the growing stage of cotton plants,the po-pulation of natural enemies,precipitations,and the compensatory ca-pabilities of the cotton plants.Cotton seedlings bellow three leaves stageare more sensitive to aphis infestation than the later stages.When seed-lings bellow three leaves stage are infested,the growth of the seedlingswill be stunned significantly,leaf area index reduced;development ofroot system influenced;and the...

The damage of cotton by Aphis gossypii Glov.is varied with thelevel of aphis infestation,the growing stage of cotton plants,the po-pulation of natural enemies,precipitations,and the compensatory ca-pabilities of the cotton plants.Cotton seedlings bellow three leaves stageare more sensitive to aphis infestation than the later stages.When seed-lings bellow three leaves stage are infested,the growth of the seedlingswill be stunned significantly,leaf area index reduced;development ofroot system influenced;and the time of squaring delayed.But as thegrowth of the cotton plants progressing,a compensatory effect can beobserved when precipitation is sufficient during the growing season.Thereis no significant difference in total boll formation on infested plants atthe end of growing season although the number of early squares may bereduced in certain extent.When seedlings of three~six leaves stage areinfested,less damage is resulted and usually no signicant difference in to-tal boll formation is observed.It is suggested that the control of aphismay be denoted by a simple calculation of damage index which can beobtained from field survey of aphis population or percentage of leavecurled plants.Pesticide should be applied as the damage index approach250(bellow three leaves stage) and 350~400 (after three leaves stage).The application of pesticide as denoted by damage index was practisedon 50000 mou of cotton in Siyang county in 1981 and applications redu-ced to 50% as comparing with the conventional spraying program.

棉蚜在淮北棉区为害1~3叶期棉苗卷叶5~12天,除株高、真叶数、叶面积指数、根系长度等都受抑制外,现蕾期推迟12天,蕾数减少59.8~77.3%,9月17日有效铃减少4.04~8.33,与不受害对照比较差异不显著。3~6叶期棉苗受蚜虫为害卷叶5~12天,对株高、叶面积有明显影响,蕾数减少10.9~17.1%,9月17日有效铃数与不受害的对照比较差异不显著。棉苗受蚜虫为害后本身有一定的调节和补偿能力,经一定的恢复时间能补偿损失赶上正常棉苗甚至不受损失。棉苗苗龄大容载蚜量大,恢复力强补偿作用明显。以棉蚜危害指数作防治指标准确简便,苗龄在1~3叶期指数为250;3~6叶期指数为350~400时进行防治,可以将棉蚜为害控制在蕾害损失5~10%以内,有效铃不受损失,按这个指标在淮北棉区防治棉蚜次数比常规方法减少50%左右。

In the years of 1980-1983, an extensive survey of rice-root nematodedisease (Hirschmanniell Qryzae LUC & Goodey, 1963) through 1000 mu of padelyfields in 23 provinces and cities. The disease was found in all fields of Variouslocalities at different altitudes from sea level in Hunan province. No varietiesof rice was found immune to. the disease, but different varietal resistancesexisted. The infested plants scarcely showed any prominent symptoms while in potinoculation tests, the infested plants exhibited...

In the years of 1980-1983, an extensive survey of rice-root nematodedisease (Hirschmanniell Qryzae LUC & Goodey, 1963) through 1000 mu of padelyfields in 23 provinces and cities. The disease was found in all fields of Variouslocalities at different altitudes from sea level in Hunan province. No varietiesof rice was found immune to. the disease, but different varietal resistancesexisted. The infested plants scarcely showed any prominent symptoms while in potinoculation tests, the infested plants exhibited stunted growth, turned yellowand gave poor tillers and yield. The larvae and adults of the nematodes could he found in fields all yearround and there was a population peak in each crop after tillering stage ofthe rice plants. the nematodes mainly overwintered at larva and adult stage inthe roots of rice stumps and weed host plants with a greater numler of femaleadults or the fourth instar larvae. Nineteen species of weeds in the rice fields were found to be host plants ofthe nematodes. Among them Leptochloa chinensis; Viola philippica: Digitariasanguinalis were the most important. Rice plants could be infested in the seedling stage; the larvae and adultspenetrated into the roots 2-3cm from the root tips. Paddy soil was found tobe a requisite medium for a successful artificial inoculation. Furadam 3G was most effective in controlling the nematodes either bysurface application before transplanting or deep application during vigoroustillering stage with a high mortality of 77.7-87.83%.

1080-1983年间在23个县、市,近千亩稻田的调查研究结果表明:以Hirschmanniclla oryzae Luc and Goodey,1963。为优势种的水稻潜根线虫,在上述县、市分布很广,受害株在大田没有明显症状,人工接种的秧苗显著矮小,叶色较淡,分蘖数减少,产量降低。该线虫分别在早、晚稻分蘖盛期过后发生一次高峰。各种虫态均可越冬。越冬场所主要是稻桩的根部,其次为某些冬季作物和宿根性杂草。越冬虫态以雌虫和四龄幼虫比例最大。该线虫还可寄生在9科19种植物上,其中以禾本科的千盒子(Leptochloa chinensis),马唐(Digtaria sanguinalis),稗草(Echinochioa crusgalli);莎草科的牛毛毡(Eleocharis acicularis),及堇莱科的紫花地丁(Viola philippca)等虫口基数最大。水稻在秧苗期开始受侵染。受侵染部位通常在离根尖2-3厘米处。人工接种要在有泥土栽种水稻的条件下才能成功。不同品种抗性不同,但未发现有免疫的品种,此外,不同耕作制度及不同海拔的情况下,虫口密度也有较大差异。大田防治采用3%呋喃丹颗粒剂,每亩4斤,于插秧前...

1080-1983年间在23个县、市,近千亩稻田的调查研究结果表明:以Hirschmanniclla oryzae Luc and Goodey,1963。为优势种的水稻潜根线虫,在上述县、市分布很广,受害株在大田没有明显症状,人工接种的秧苗显著矮小,叶色较淡,分蘖数减少,产量降低。该线虫分别在早、晚稻分蘖盛期过后发生一次高峰。各种虫态均可越冬。越冬场所主要是稻桩的根部,其次为某些冬季作物和宿根性杂草。越冬虫态以雌虫和四龄幼虫比例最大。该线虫还可寄生在9科19种植物上,其中以禾本科的千盒子(Leptochloa chinensis),马唐(Digtaria sanguinalis),稗草(Echinochioa crusgalli);莎草科的牛毛毡(Eleocharis acicularis),及堇莱科的紫花地丁(Viola philippca)等虫口基数最大。水稻在秧苗期开始受侵染。受侵染部位通常在离根尖2-3厘米处。人工接种要在有泥土栽种水稻的条件下才能成功。不同品种抗性不同,但未发现有免疫的品种,此外,不同耕作制度及不同海拔的情况下,虫口密度也有较大差异。大田防治采用3%呋喃丹颗粒剂,每亩4斤,于插秧前表施和分蘖期深施,防效可达79.7-87.8%。

The dry burning heart disease of chinese cabbage occurred mainly in the cabbage growing in calcareous soils. The infested plants were very Like to be deficiency of Mn. The slag containing rare earth elements applied to the cabbage in proper amount increased the yield of the cabbage, with 15-20% yield increase for spraying application and 5-10% yield increase for the application of the slag mixed with seeds. And the disease reduced significantly by application of Mn and the slag.

北方大白菜干烧心病主要发生在钙质土地区。大白菜干烧心病是由于土壤中的活性锰严重缺乏而造成的生理性病害。分析表明,病株含锰量较正常菜株低。通过施用锰素,并用激活剂激活锰,研制出新产品“大白菜干心防治丰”,可增加大白菜产量与防治住干烧心病,并且施用方法简便,不污染农业环境。

 
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