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   药剂防效 在 植物保护 分类中 的翻译结果: 查询用时:0.111秒
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  chemicals control
According to the German Chemicals Control Act, test data have to be presented by the manufacturer or distributor before a new chemical is introduced into the market.
      
Experimental treatments consisted of outdoor pools that contained known concentrations of fish chemicals (low, medium, or high) or no fish chemicals (control).
      
These methods play a central role in the EU policy on chemicals control and they are referred in many pieces of EU legislation.
      
  control effect
Flutter control effect and mechanism of central-slotting for long-span bridges
      
The control effect of central-slotting depends on the aerodynamic configuration of the original girder section and the corresponding central-slotting width.
      
The control channel is divided into two channels (fast and slow) for enhancing the speed of response at a significant range of the control effect.
      
Simulation results indicated that the proposed controller exhibits satisfying control effect.
      
The activities of enzymes responsible for lignification in pepper, pre-inoculation with arbuscular mycorrhizal (AM) fungus ofGlomus intraradices and/or infection with pathogenic strain ofPhytophthora capsici, and the biological control effect ofG.
      
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  control
Some applications are given to control theory for partial differential equations.
      
Thus, PPARα/γ dual agonists may provide superior therapy to the current PPARγ-selective agonists, due to the additional lipid control afforded by the PPARα component.
      
Study subjects were divided into three groups: subjects in group 1 were microalbuminuric diabetic (n = 33), in group 2 subjects were normoalbuminuric diabetic group (n = 32), and group 3 was formed from nondiabetic healthy control subjects (n = 18).
      
Serum VEGF concentrations were significantly higher in the diabetic groups than in the control group even at the normoalbuminuric stage.
      
Compound IVc indicated the best antibacterial activity compared with the control drug ampicillin (CAS 69-53-4).
      
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  chemicals control
According to the German Chemicals Control Act, test data have to be presented by the manufacturer or distributor before a new chemical is introduced into the market.
      
Experimental treatments consisted of outdoor pools that contained known concentrations of fish chemicals (low, medium, or high) or no fish chemicals (control).
      
These methods play a central role in the EU policy on chemicals control and they are referred in many pieces of EU legislation.
      
  其他


The head smut[Sphacelotheca reiliana(Kühn)Clint.]of corn is oneof the most important diseases in Bai-Cheng region of Jilin province.The percentage of smut plant is usually about 3-5%,and sometimesover 30%.The symptoms besides the ordinary stunting,rosetto andpolystooling were observed.The smut balls occur mostly on ears andsometimes on both ears and tassels.Chlamydospores collected from natural dissemination showed a highpercentage of germination,but those collected from inner part of thesorus were low in germination.Although...

The head smut[Sphacelotheca reiliana(Kühn)Clint.]of corn is oneof the most important diseases in Bai-Cheng region of Jilin province.The percentage of smut plant is usually about 3-5%,and sometimesover 30%.The symptoms besides the ordinary stunting,rosetto andpolystooling were observed.The smut balls occur mostly on ears andsometimes on both ears and tassels.Chlamydospores collected from natural dissemination showed a highpercentage of germination,but those collected from inner part of thesorus were low in germination.Although it might be carried on seed-coat yet soil transmission is considered to be the main mode of dissemi-nation since the chlamydospores maintained their vitality in soils forthree years.Higher infections might be obtained from the contaminatedsoil.Infections in seedling stage occurred abundantly until 4 leaf stage,and actually decreased since the starting of the 5 leaf stage and noinfection took place at leaf stage.Head smut fungus from corn did not infect sorghum.On the cont-rary corn plants were to be infected by sorghum head smut with a lowrate.The chlamydospores thus produced from corn plants lost the abi-lity to infect sorghum,however infected corn in an increasing rate.Itmight be due to the different physiological races in the smutinoculum.The head smut fungus collected from Shanxi and Xinjiang were weakin pathogenicity and those from Liaoning and Jilin are strong.More than 200 inbred lines and hybrids had been tested for theirresistance to head smut in field plots.The high resistant varieties werealmost immune.The resistance of maternal plants had more importantinfleunce to next generations.Over hundred fungicides tested for seed treatment,a few of themshowed 70% controlling effects and were not stable in different years.Most fungicides only showed 50% controlling effects.

玉米丝黑穗病是白城地区的重要病害,一般发病率为3—5%,重者高达30%以上,是生产上急待解决的问题。其症状以正常型为主,有时出现矮化型、矮化丛生型和多分蘖型等特异症状。病株以雌穗为黑穗、雄穗为健穗及雌雄穗皆为黑穗者居多。病穗上自然脱落的厚垣孢子萌发率高,病穗内的萌发率明显降低。此病为系统侵染病害,种子及土壤均可带菌传病,以土壤带菌为主,属土传病害。厚垣孢子在土壤里能存活三年,土壤带菌量越多,菌土覆盖种子越厚,发病率越高。丝黑穗病菌侵染玉米幼苗时间较长,从种子萌芽到四叶期最易侵染,五叶期后,侵染明显下降,八叶期后不再侵染。在幼苗叶片上接菌不能侵染致病。玉米丝黑穗病菌不能侵染高梁。高梁丝黑穗病菌能侵染玉米,但侵染率甚低。侵染玉米后的病菌,不再侵染高梁,只侵染玉米,且致病力明显增强。两菌是同一菌种的不同生理型。用来自九个省、市的丝黑穗病菌接种于不同抗性的自交系鉴定寄主,其致病力不同,陕西和新疆的致病力弱,辽宁和吉林的致病力强。在田间人工接种条件下,鉴定了二百余份自交系和杂交种的抗病性,品种间有明显差异,高抗的近于免疫,高感的发病率在90%以上。抗病性遗传规律表现为双亲高抗的,其后代亦抗,以母本的抗病性起主导作用。选...

玉米丝黑穗病是白城地区的重要病害,一般发病率为3—5%,重者高达30%以上,是生产上急待解决的问题。其症状以正常型为主,有时出现矮化型、矮化丛生型和多分蘖型等特异症状。病株以雌穗为黑穗、雄穗为健穗及雌雄穗皆为黑穗者居多。病穗上自然脱落的厚垣孢子萌发率高,病穗内的萌发率明显降低。此病为系统侵染病害,种子及土壤均可带菌传病,以土壤带菌为主,属土传病害。厚垣孢子在土壤里能存活三年,土壤带菌量越多,菌土覆盖种子越厚,发病率越高。丝黑穗病菌侵染玉米幼苗时间较长,从种子萌芽到四叶期最易侵染,五叶期后,侵染明显下降,八叶期后不再侵染。在幼苗叶片上接菌不能侵染致病。玉米丝黑穗病菌不能侵染高梁。高梁丝黑穗病菌能侵染玉米,但侵染率甚低。侵染玉米后的病菌,不再侵染高梁,只侵染玉米,且致病力明显增强。两菌是同一菌种的不同生理型。用来自九个省、市的丝黑穗病菌接种于不同抗性的自交系鉴定寄主,其致病力不同,陕西和新疆的致病力弱,辽宁和吉林的致病力强。在田间人工接种条件下,鉴定了二百余份自交系和杂交种的抗病性,品种间有明显差异,高抗的近于免疫,高感的发病率在90%以上。抗病性遗传规律表现为双亲高抗的,其后代亦抗,以母本的抗病性起主导作用。选百余种农药处理种子,筛选结果:个别药剂防效有高达70%以上者,但年度间效果不稳定,多数药效稳定在50%左右。

The 24%Yiqing EC which is a new combined for-mulation of organophosphorus and pyrethroid insecticides,have high synergisrn to control diamondback rnoth,Plutellaxvlostella(L.),The co-toxicity coefficient exceeds 260.Thecontrol effects of combined formulation in fields are between82.5%and 94.5%, whereas the cornponents by thernselveshave lower control effects between 7.3%and 67.9%.

24%乙氰乳油是有机磷和拟除虫菊酯的二元复配制剂,对小菜蛾共毒系数在26O以上,对小莱蛾的田间防治效果在82,5~94。3%M之间,而其他药剂防效在7.3~67.9%之间

This paper deals with the overwintering,occurrence andcontrol of Hevossia horrida in fe-mal parent of hybrid rice,The teliospores of N. horrvda do not germinate untiI their dormantperiod is over.Under laboratory conditions the dormant period of teliospores lasts 7 monthsand the teliospores live for 2 years. But under field conditions the dormant period lasts 6months and the teliospores live for one year. In water and deep soil,the viability of the te-liospores is obeviously lower than that on the surface of...

This paper deals with the overwintering,occurrence andcontrol of Hevossia horrida in fe-mal parent of hybrid rice,The teliospores of N. horrvda do not germinate untiI their dormantperiod is over.Under laboratory conditions the dormant period of teliospores lasts 7 monthsand the teliospores live for 2 years. But under field conditions the dormant period lasts 6months and the teliospores live for one year. In water and deep soil,the viability of the te-liospores is obeviously lower than that on the surface of soil and under room conditions. Theresults also show that the resistance of female parents varies obviously,Zhenshan 97A is moreresistant than V20A and Changfei 22 A,The disease is more severe under the conditions oflarge application of nitrogen and high humidity.Soaking the seed with Formalin and Qianlu-jing has good effect.Spraging l2.5%diniconazole and 50%Carbendazim may control the dis-ease effectively.Winter irrigation and deep ploughing may reduce the occurrence of the dis- ease.

研究了杂交水稻母本粒黑粉病病原菌的越冬、发病条件及防治,粒黑粉病菌冬孢子在室内需7个月的休眠期方能萌发,存活期2a;在室外需6个月休眠期,存活期1a.水浸和土壤深层越冬的冬孢子存活力明显低于土壤表层和室内越冬的冬孢子。不同母本抗性差异显著,珍汕97A较抗病,V20A和常菲22A较感病。氮肥用量高,田间湿度大,发病严重。福尔马林和强氯精浸种效果好。田间药剂防效以12.5%速保利(1500倍)和50%多菌灵(500倍)最高。冬浸和表土深翻制种田,能减轻发病。

 
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