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imidacloprid    
相关语句
  吡虫啉
    Identification of a strain NJ2 hydroxylating imidacloprid and the transformed product
    一株吡虫啉羟基化菌株及其转化产物的鉴定
短句来源
    Study Stenotrophomonas Maltophilia NJ2 in Transforming Imidacloprid to 5-hydroxy Imidacloprid
    羟基化吡虫啉菌株的筛选及转化作用研究
短句来源
  吡虫啉
    Identification of a strain NJ2 hydroxylating imidacloprid and the transformed product
    一株吡虫啉羟基化菌株及其转化产物的鉴定
短句来源
    Study Stenotrophomonas Maltophilia NJ2 in Transforming Imidacloprid to 5-hydroxy Imidacloprid
    羟基化吡虫啉菌株的筛选及转化作用研究
短句来源
  吡虫啉
    Identification of a strain NJ2 hydroxylating imidacloprid and the transformed product
    一株吡虫啉羟基化菌株及其转化产物的鉴定
短句来源
    Study Stenotrophomonas Maltophilia NJ2 in Transforming Imidacloprid to 5-hydroxy Imidacloprid
    羟基化吡虫啉菌株的筛选及转化作用研究
短句来源
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  imidacloprid
Determination of the Insecticide Imidacloprid in Potato (Solanum tuberosum L.) and Onion (Allium cepa) by High-Performance Liqui
      
A high-performance liquid chromatography (HPLC) method has been proposed for the determination of imidacloprid residues in fortified potato (Solanum tuberosum L.) and onion (Allium cepa) and in treated potato and onion samples.
      
Sample preparation consisted of dichloromethane extraction of imidacloprid from the plant material, followed by purification of the obtained onion extract on an LC-Florisil disposable cartridge.
      
The HPLC-diode-array-detection (DAD) method has been developed on reversed phase for separation of imidacloprid with isocratic elution with a mixture of 0.01 M phosphate buffer (pH 3.15) and acetonitrile (75 : 25, v/v).
      
Spectral data obtained with DAD allow the identification of imidacloprid residue.
      
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In this paper, several biochemical toxicity tests were conducted to evaluate the biochemical toxicity of 2 new pesticides, imidacloprid and RH 5849 on earthworms (Eisenia foetida) in terms of their effects on the activites of cellulase and superoxide dismutase (SOD). The earthworms were exposed in the solution of pesticides under different exposure concentrations and during different exposure time. The results showed that imidacloprid could be observed to inhibit the activity of cellulase. ...

In this paper, several biochemical toxicity tests were conducted to evaluate the biochemical toxicity of 2 new pesticides, imidacloprid and RH 5849 on earthworms (Eisenia foetida) in terms of their effects on the activites of cellulase and superoxide dismutase (SOD). The earthworms were exposed in the solution of pesticides under different exposure concentrations and during different exposure time. The results showed that imidacloprid could be observed to inhibit the activity of cellulase. The celluase activites in Eisenia foetida were decreased with an increase in the exposure concetrations of imidacloprid and had especially significant reduction ( P >0.01)when the concentrations of imidacloprid reached 0.1?mg/L. From the results of exposure to imidacloprid at the concentration of 0.2?mg/L over different time, we can find the same inhibition effect. The cellulase activities in Eisenia foetida were decreased with an increase in the exposure time of imidacloprid and had significant reduction ( P <0.05)when the exposure time reached 3 hours. However, when the concentration of imidacloprid was high as the 1/2?LC 50 (0.5?mg/L),the cellulase activity of Eisenia foetida repomoted to be higher than that of exopsed to 0.1?mg/L and lower than the control, which may be caused by the death of earthworm and auto lysis of earthworms. Rh 5840 showed the similar inhibition effects on the cellulase activity of Eisania foetida , but the results did not show signficant statistical differences. As to the effects of the two pesticides on the SOD activity in Eisania foetida , it can be seen that imidacloprid showed inhibition effect on the SOD activity at low concentration and promotion effect at higher concentrations. After 4 hours'exposure unber the concentration of 0.1?mg/L, the SOD activity decreased especially significantly ( P <0.01)and as the concentrations increased (0.2?mg/L,0.5?mg/L)the SOD activities began to increase and were higher than the control. As to the effect of imidacloprid over various exposure time, it showed inhibition effects on the SOD activity of earthworms in 1h, 2h and 3h, but promoted the SOD activities when the exposure time reached 4 hours. RH 5749 did not have inhibition effect in the SOD activity. The SOD activities were observed to have especially significant increase under the exposure concentration of 5?mg/L and continued to promoted with the increase of concentrations of RH 5849.Shown from the results of different exposure time under 25?mg/L?RH 5849, the SOD activities increased when the exposure time extended and the dose effect relationship displayed.

研究了吡虫啉与抑食肼对蚯蚓体内的蛋白含量、纤维素酶和SOD酶活性的影响 .结果显示吡虫啉在浓度低于 0 .2mg/L、抑食肼低于 2 5mg/L浓度范围内对蚯蚓纤维酶活力有抑制作用 .低浓度吡虫啉对蚯蚓超氧化物歧化酶活力有抑制作用 ,高浓度吡虫啉和抑食肼则有促进作用 .

The experimental orchards were located at Qiaotou town of Dongguan city,Guangdong Province,China.The litchi trees were planted between 1993 and 1994 with a distance of 3m between trees and 5m between rows.In a 2 hm 2 orchard,Desmodium intortum (Mill.Urb.),a forage legume,was planted in litchi orchard.This orchard is subsequently referred to as a complex system consisting of a litchi subsystem and a forage subsystem.In an adjacent 2 hm 2 orchard,ground cover plants (mostly weeds) were removed by farmers,and...

The experimental orchards were located at Qiaotou town of Dongguan city,Guangdong Province,China.The litchi trees were planted between 1993 and 1994 with a distance of 3m between trees and 5m between rows.In a 2 hm 2 orchard,Desmodium intortum (Mill.Urb.),a forage legume,was planted in litchi orchard.This orchard is subsequently referred to as a complex system consisting of a litchi subsystem and a forage subsystem.In an adjacent 2 hm 2 orchard,ground cover plants (mostly weeds) were removed by farmers,and this orchard is subsequently referred to as a simple system.In both the complex and the simple systems,integrated pest management measures were taken including culturing strong trees,releasing mass-reared wasps of Anastatus sp to control litchi stink bug,utilizing selective pesticides such as imidacloprid to control twig insect pests,and using petroleum spray oil to control pests such as scales and mites. Arthopod censuses were conducted from September,1997 to September,1998,at 20 day intervals.5 sample spots were selected in either system,with 2 trees at each spot.Arthropods were caught by net-sweeping and twig-checking at these spots throughout the investigation period.Arthropods in the ground cover were also gathered in 5 quadrates (9m 2 each) in the complex system by 30 sweeps in each quadrate.All individuals collected were counted and identified. The arthropod community was divided into 4 assemblages including phytophagous insects,parasitic and predatory insects,spiders,and scavengers and others.The BergerParker index of dominance,Simpson index of dominant concentration,and Shannon-Wiener diversity index were used to analyze the arthropod community. The phytophagous insect assemblage accounted for 60.6% of all arthopods in the simple system,in constast to 30.3% in the complex system.In the simple system,11.2% of all arthropods were spiders,compared with 18.9% in the complex system respectively.Parasitic and predatory insects made up 11.6% and 22.4% of the simple system and the complex system respectively.Much greater percentages of polyphagous and other insects were found in the complex system (28.3%) than in the simplex system (16 6%).In comparison to the simple system,there was a decrease in the percentage of phytophagous insects in the complex system,accompanied by increase in the percentage of spider,parasitoids,predator,polyphagous and other insects. The degree of dominance of arthropod assemblage in the complex system was much lower (0.0631) than in the simple system (0.1332),because more numerically dominant species and less rare species were collected in the simple system.Much greater average species richness of arthropod assemblage was found in the complex system (43.1) than in the simple system (25.7).There were much more species in arthropod assemblage collected in the complex system than in the simple system.The diversity of arthropod assemblage was much higher in the complex system (3.2549) than in the simple system (2.599).There was no obvious difference in the evenness between two systems. Ecologists studied community stability from different perspectives,but there have been arguments about the relationship between diversity and stability so far,higher diversity does not always mean higher stability.So,3 indices derived from diversity were used to assess the arthropod community stability.The same conclusion could be drawn upon using all three indices that the arthropod community in the complex system should be more stable.Planting forage in the litchi orchard improved the arthropod community diversity,as well as stability.Clear mechanisms of forage plants' role in improving arthropod diversity and stability need further studies. The development of arthropod diversity in the litchi-herbage complex system is divided into 5 stages through using best sectioning of orderly samples.The status of phytophagous,parasitic,predatory,polyphagous insects and spiders indicated in these 5 periods could be conducive to deciding appropriate control measures in different time of a year. The management ta

1997年 9月到 1 998年 9月在广东东莞对荔枝 -牧草复合系统和单一系统的节肢动物群落进行了比较研究 ,结果表明 :荔枝 -牧草复合系统同单一系统相比节肢动物群落数量 ,物种丰富度及均匀性增加 ,多样性提高。复合系统中各类群的多样性几乎在一年中的任何时期都比单一系统要高 ,但不同系统各类群的多样性对夏季高温和荔枝树生长阶段的反应极不一致。利用 3个指数来评价群落的稳定性 ,结果都说明复合系统中的节肢动物群落显得较为稳定。看来 ,荔枝 -牧草复合系统是荔枝园中维持 ,保护和利用节肢动物群落多样性的一种很好的模式。用有序样品的最优分割方法 ,把荔枝 -牧草复合系统的节肢动物群落最优划分为了 5个阶段 ,各个阶段节肢动物各类群的多样性特征及主要害虫和天敌状态的明确能对复合系统中荔枝害虫综合防治措施的适时采用起指导作用。

Selective toxicities of 10 fungicides and 11 insecticides to a bumblebee (Bombus terrestris) were determined in a laboratory.Fungicides were harmful to the bumblebees, but their toxicity was much lower than that of the insecticides. Of the 10 fungicides, the toxicity of 58% Ridomil MZ (metalaxyl mancozeb) wp and 64% Sandofan M8 (oxadixyl mancozeb) wp was the lowest, the toxicity of 40% FuXian (flusilazole) EC, 50% Sumilex (procymidone) wp, 80%Dithane M 45 (mancozeb) wp and so on was lower, 62.2% Gana...

Selective toxicities of 10 fungicides and 11 insecticides to a bumblebee (Bombus terrestris) were determined in a laboratory.Fungicides were harmful to the bumblebees, but their toxicity was much lower than that of the insecticides. Of the 10 fungicides, the toxicity of 58% Ridomil MZ (metalaxyl mancozeb) wp and 64% Sandofan M8 (oxadixyl mancozeb) wp was the lowest, the toxicity of 40% FuXian (flusilazole) EC, 50% Sumilex (procymidone) wp, 80%Dithane M 45 (mancozeb) wp and so on was lower, 62.2% Gana (myclobutanil mancozebl) wp and 40% Bellkute (iminoctadine tris) wp had obvious toxicity to the bumblebees, causing the bumblebee mortality of over 30% at 7 days after application. All the tested insecticides were obviously harmful to the bumblebees. 5% Regent (fipronil) SC,10% Yibianjing (imidacloprid) wp and 48%Lorsban (chlorpyrifos) EC had higher toxicity, and the bumblebee mortality was over 90% at 2 daysafter application. 20% Mimic (tebufenozide) SC, 5% Atabron (chlorfluazuron) EC and 50% Apollo (clofentezine) SC had slightly low toxicity,and the mortality was about 15% at 7 days after application.Other insecticides such as 25% Applaud (buprofezin) WP,10%ChuJin (chlorfenapyr) EC,1.8% Agrimec(abamectin) EC,20% Kui LiuLin (quinalphos) EC and 2.5% Talstar (bifenthrin) EC were in middle,causing the mortality of 30%~80% at 7 days after application. For 10% Yibianjing (imidacloprid) wp, about 50 days’ interval was needed before introducing the bumblebees again after sprinkling. For 2.5% Talstar (bifenthrin) EC, 10 days’interval was needed and for 1.8% Agrimec (abamectin) EC, only about 3 days was needed.

用触杀和残毒试验的方法 ,测定了番茄生产中常用的 1 0种杀菌剂和 1 1种杀虫剂对欧洲熊蜂(Bombusterrestris)的毒性。触杀试验结果表明 :(1 )杀菌剂对熊蜂也具有杀伤作用 ,但其致死作用明显低于杀虫剂。 (2 )在供试的杀菌剂中 ,以 6 2 .2 %仙生 (myclobutanil mancozebl)可湿性粉剂和 4 0 %百可得 (iminoctadinetris)可湿性粉剂对熊蜂的毒害比较明显 ;其次为 4 0 %福星 (flusilazole)乳油、5 0 %多菌灵 (carbendazim)可湿性粉剂、5 0 %速克灵 (procymidone)可湿性粉剂、4 0 %达科宁 (chlorothalonil)悬浮剂、5 0 %扑海因 (iprodione)可湿性粉剂、80 %大生(mancozeb)可湿性粉剂等 ;5 8%的雷多米尔 (metalaxyl mancozeb)可湿性粉剂和 6 4 %杀毒矾 (oxadixyl mancozeb)可湿性粉剂对熊蜂的毒害作用最低。 (3)杀虫剂对熊蜂的毒害比较明显 ,2 0 %米满 (tebufenozide)悬浮剂、5 %抑太保(ch...

用触杀和残毒试验的方法 ,测定了番茄生产中常用的 1 0种杀菌剂和 1 1种杀虫剂对欧洲熊蜂(Bombusterrestris)的毒性。触杀试验结果表明 :(1 )杀菌剂对熊蜂也具有杀伤作用 ,但其致死作用明显低于杀虫剂。 (2 )在供试的杀菌剂中 ,以 6 2 .2 %仙生 (myclobutanil mancozebl)可湿性粉剂和 4 0 %百可得 (iminoctadinetris)可湿性粉剂对熊蜂的毒害比较明显 ;其次为 4 0 %福星 (flusilazole)乳油、5 0 %多菌灵 (carbendazim)可湿性粉剂、5 0 %速克灵 (procymidone)可湿性粉剂、4 0 %达科宁 (chlorothalonil)悬浮剂、5 0 %扑海因 (iprodione)可湿性粉剂、80 %大生(mancozeb)可湿性粉剂等 ;5 8%的雷多米尔 (metalaxyl mancozeb)可湿性粉剂和 6 4 %杀毒矾 (oxadixyl mancozeb)可湿性粉剂对熊蜂的毒害作用最低。 (3)杀虫剂对熊蜂的毒害比较明显 ,2 0 %米满 (tebufenozide)悬浮剂、5 %抑太保(chlorfluazuron)乳油、5 0 %阿波罗 (clofentezine)悬浮剂的毒性较低 ;而 5 %锐劲特 (fipronil)悬浮剂、1 0 %一遍净 (imi dacloprid)可湿性粉剂、4 8%乐斯本 (chlorpyrifos)乳油的毒性较高 ;2 5 %扑虱灵 (buprofezin)可湿性粉剂、1 0 %除尽(chlorfenapyr)乳油、1 .8%害极灭 (abamectin)乳油、2 0 %喹硫磷 (quinalphos)乳油、2

 
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