搜索结果: 16-30 共查到“知识库 植物药理学”相关记录124条 . 查询时间(3.293 秒)
The importance of monitoring the Ceutorhynchus pallidactylus female flight activity for the timing of insecticidal treatment
Ceutorhynchus pallidactylus cabbage stem weevil winter oil-seed rape alpha-cypermethrin etofenprox chlorpyrifos + cypermethrin insecticidal effect
2015/3/3
The effects of two pyrethroids and one combination of organophosphate and pyrethroid (alpha-cypermethrin, etofenprox, chlorpyrifos + cypermethrin) on Ceutorhynchus pallidactylus (Marsham, 1802) (Coleo...
Effectiveness of some botanical insecticides against Spodoptera littoralis Boisduvala (Lepidoptera: Noctudiae), Myzus persicae Sulzer (Hemiptera: Aphididae) and Tetranychus urticae Koch (Acari: Tetranychidae)
Spodoptera littoralis Myzus persicae Tetranychus urticae botanical insecticides Azadirachta indica Chrysanthemum cinerariifolium Pongamia glabra
2015/3/3
Biological efficiency of botanical insecticides was determined that were obtained from Pongamia glabra, Azadirachta indica and Chrysanthemum cinerariifolium against Spodoptera littoralis, Myzus persic...
Effect of Bio-rational Insecticides on Some Biological Aspects of the Egyptian Cotton Leafworm Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae)
bio-rational insecticides Spodoptera littoralis
2015/3/2
The bio-rational insecticides Dipel 2x, BioFly, Agrin, BioGuard, Spinosad, Neemix, Mectin and Match were
tested for their effect on 1st, 3rd and 5th instar larvae and egg masses (24, 48 and 72 h old...
The sensitivity of flower bud thrips, Megalurothrips sjostedti Trybom (Thysanoptera: Thripidae), on cowpea to three concentrations and spraying schedules of Piper guineense Schum. & Thonn. extracts
control of Megalurothrips sjostedti extracts of Piper guineense Vigna unguiculata application Schedule
2015/2/6
The extracts of pods of West African black pepper, Piper guineense, at 5, 10 and 20% (w/v), were applied at two, four and six weekly schedules to control the legume flower bud thrips, Megalurothrips s...
Control of target spot of tomato with fungicides, systemic acquired resistance activators, and a biocontrol agent
target spot Corynespora cassiicola tomato Lycopersicon esculentum biocontrol agents systemic acquired resistance fungicides
2015/1/28
Control of target spot of tomato, caused by the fungus Corynespora cassiicola (Berk. & Curt.) Wei., was studied in three seasons in southern Florida, USA. The strobilurin fungicide azoxystrobin and a ...
乳状液被广泛应用于食品、石油、化妆品和农用化学品等领域,稳定性是影响其使用寿命和功能发挥的关键因素。因此,快速、准确地表征乳状液的稳定性一直被人们所关注。农药水乳剂是以乳状液为基础的农药剂型之一,具有高效、低毒和环保等优点。文章简要介绍了乳状液在食品和石油等领域的应用及研究现状,重点综述了液滴粒径及其分布测定、电导率测定、微观结构研究、拟三元相图研究和液滴表面电动性能研究等表征乳状液制备与使用过程...
为明确醚菌酯和腐霉利在温室条件下在草莓中的残留行为及其可能产生的膳食摄入风险,于2012—2013年在北京的日光温室进行了醚菌酯和腐霉利喷施草莓的3次田间农药残留试验,建立了一种快速、简便的气相色谱-质谱联用检测草莓果实中农药残留量的方法,并对不同人群的膳食暴露及风险进行了评估。草莓样品经乙腈提取,PSA(乙二胺-N-丙基硅烷)净化,采用气相色谱分离,四极杆质谱检测,外标法定量。结果表明:醚菌酯和...
采用光学视频接触角测量仪测定了苹果叶片的表面自由能,以及2.5%高效氟氯氰菊酯水乳剂(beta-cyfluthrin EW)稀释液的表面张力及静态接触角、0~60 s动态接触角。结果表明:苹果叶片近轴面的表面自由能为52.76 mJ/m2,以极性分量为主导;而远轴面的表面自由能为21.79 mJ/m2,且以色散力分量(非极性分量)为主导。高效氟氯氰菊酯水乳剂2 000倍稀释液的表面张力为52.45...
嘧菌酯在水和有机溶剂中的光化学降解
嘧菌酯 光化学降解 光敏化作用 光淬灭作用
2016/3/21
以500 W氙灯为光源,研究了嘧菌酯在水和有机溶剂中的光化学降解动态及其影响因素。结果表明:当质量浓度为5 mg/L时,嘧菌酯在纯水中光解的半衰期为5.8 h,在2~20 mg/L范围内,其光解速率随初始质量浓度的增大而降低;嘧菌酯在不同介质中的光解速率从大到小依次为乙腈 >水 >甲醇 >正己烷 >丙酮,其半衰期分别为4.8、5.8、11.5、12.1和23.5 h;硝酸盐对嘧菌酯在水中的光解具有...
在模拟动物体生理条件下,利用荧光光谱方法,以牛血清蛋白(BSA)为对照,对除草剂氟磺胺草醚与植物蛋白(11S蛋白、酶解后11S蛋白)的互作效应进行研究。分析蛋白发生变性反应后,氟磺胺草醚与牛血清白蛋白、植物蛋白结合常数和结合位点数的变化情况。结果表明:氟磺胺草醚对蛋白有较强的荧光猝灭作用,氟磺胺草醚与牛血清、11S蛋白、酶解后11S蛋白发生结合反应生成了新的复合物,属于静态荧光猝灭。根据不同温度下...
三氟啶磺隆是一种新型、高效、低毒的棉田除草剂,为明确其在我国棉田的应用前景,以嘧草硫醚为对照药剂,采用温室盆栽法对三氟啶磺隆的杀草谱、除草活性及对棉花的安全性进行了评价。结果表明:在有效成分11.25 g/hm2剂量下,三氟啶磺隆对香附子、狗尾草、鳢肠、小藜、画眉草、小飞蓬、千金子、鬼针草、苍耳、鹅肠菜和反枝苋的鲜重防效均在90%以上,且对棉田杂草香附子、苘麻、狗尾草、反枝苋和马齿苋的除草活性均高...
玉米中氯虫苯甲酰胺残留的超高效液相
氯虫苯甲酰胺 超高效液相色谱 玉米 残留
2016/3/22
研究建立了快速检测玉米中氯虫苯甲酰胺残留的超高效液相色谱(UPLC)分析方法。样品用乙腈-二氯甲烷[V(乙腈)∶V(二氯甲烷)=20∶80]提取,经N-丙基乙二胺(PSA)分散固相萃取剂净化,UPLC分离,二极管阵列检测器于254 nm处检测,外标法定量。结果表明:当添加水平为0.02~1 mg/kg时,平均回收率为81% ~91%,相对标准偏差(RSD)为6.2% ~14.0%;最小检出量(LO...
Occurence of Rust Disease Caused by Puccinia oxalidis on Oxalis triangularis in the Czech Republic – Short Communication
leaf spot ornamental plants Purple Shamock
2015/3/11
Oxalis triangularis A. St.-Hil. (syn. Oxalis regnellii)
is a bulbous perennial with a low, moderate growth
habit. The cultivated variety O. triangularis subsp.
戊唑醇在葡萄和土壤中的残留和消解动态
戊唑醇 葡萄 残留 消解
2016/3/21
建立了葡萄中戊唑醇残留的气相色谱测定方法,并研究了其在葡萄和土壤中的消解动态。土壤用乙腈提取,无需净化,葡萄样品用甲醇提取,二氯甲烷液液分配净化后用气相色谱-氮磷检测器(GC-NPD)测定。结果表明:在 0.01、0.1、1 mg/kg 3个添加水平下,戊唑醇的平均回收率为85.0%~98.8%,相对标准偏差(RSD)为2.9%~10.4%;最小检出量为1×10-11g,最低检测浓度为0.01 m...