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1.
采用流点法对二氰蒽醌悬浮剂的润湿分散剂进行了初筛,利用黏度法确定了润湿分散剂的最佳用量通过分析二氰蒽醌悬浮剂54℃下热贮前后平均粒径、悬浮率等物化性能确定了50%二氰蒽醌悬浮剂的最佳配方,结果表明,该产品热贮14d后,悬浮率在97%以上,分解率2%,其他各项指标均符合悬浮剂的要求。  相似文献   

2.
苯醚甲环唑·多菌灵20%悬浮剂的研制   总被引：1，自引：0，他引：1  
通过对不同润湿分散剂、增稠剂、防冻剂的配方筛选,得到苯醚甲环唑.多菌灵20%悬浮剂的最佳制剂配方为：苯醚甲环唑10.0%,多菌灵10.0%,分散剂MF 2.0%,分散剂NNO 0.5%,HY-21.5%,农乳500#1.0%,黄原胶0.15%,乙二醇4.0%,消泡剂0.5%,水70.35%,该悬浮剂悬浮率≥90%,分散性良好,热贮稳定性合格。  相似文献   

3.
本文通过对润湿分散剂、增稠剂和防腐剂等助剂的筛选,最终确定了50%噻嗪酮悬浮剂的最佳配方:噻嗪酮原药50%、分散剂SD-06为2.0%、润湿剂SR-08为1.0%、乙二醇4.0%、黄原胶2.0%、硅酸镁铝0.5%、苯甲酸钠0.2%、有机硅消泡剂AFE-31680.2%、去离子水补足。实验结果表明:该配方制备的悬浮剂平均粒径4μm,悬浮率95%以上,其它各项指标均达到悬浮剂的要求。  相似文献   

4.
本文通过对润湿分散剂、增稠剂和防冻剂等助剂的筛选,确定了氟虫脲5%悬浮剂的优化配方:氟虫脲5%原药,2.0%润湿分散剂GY-D08:W10(2:1),2.5%增稠剂(自制),5.0%尿素,0.05%消泡剂,去离子水补足至100%。试验结果表明:该配方制备的悬浮剂其悬浮率在90%以上,热贮分解率5%,其他各项质量控制指标均符合要求。  相似文献   

5.
本研究采用流点法和Zeta电势对嘧菌酯悬浮剂的润湿分散剂进行筛选,利用黏度法确定了润湿分散剂的最佳用量;在此基础上,结合嘧菌酯悬浮剂热贮(54±2.0)℃14d后平均粒径变化、悬浮率、黏度等物化性能,确定了嘧菌酯250g/L悬浮剂的最佳配方,结果表明,该产品热贮14d后,悬浮率93%以上,分解率5%,三倍硬水悬浮率≥85%,其他各项指标均符合悬浮剂的要求。  相似文献   

6.
本研究通过对润湿分散剂、增稠剂和防冻剂等助剂的筛选,最终确定了40%丁香·戊哇醇悬浮剂的最佳配方:丁香菌酯原药10.4%、戊唑醇原药31%、SD-208为6%、乙二醇4%、黄原胶7%、有机硅消泡剂1%、去离子水补足。结果表明:该配方制备的悬浮剂平均粒径<3μm,悬浮率95%以上,其它各性能指标也均达到悬浮剂的要求。并通过悬浮剂的Zeta电位值说明了体系具有优良的稳定性。  相似文献   

7.
本实验通过润湿分散剂、防冻剂、增稠剂等助剂的筛选,以及加工工艺的改变,最终完成了氟环唑60%悬浮剂的配方筛选。氟环唑60%悬浮剂最佳配方为:氟环唑60%,润湿分散剂5%,防冻剂2%,黄原酸胶0.05%,防腐剂0.1%,消泡剂0.5%,水补足100%。  相似文献   

8.
本文通过对润湿分散剂、增稠剂和pH调节剂等助剂的筛选,最终确定了40%硝磺草酮悬浮剂的最佳配方:硝磺草酮原药40.0%、SD-813为2.0%、SD-208为3.0%、乙二醇4.0%、硅酸镁铝1.0%、黄原胶5.0%、柠檬酸2.0%、AFE-3168 0.2%、去离子水补足。实验结果表明:该配方制备的悬浮剂平均粒径4μ,悬浮率95%以上,其它各项指标均达到悬浮剂的要求。  相似文献   

9.
对代森锰锌35%水悬浮剂配方进行了研究。通过流点法缩小润湿分散剂的选择范围,对润湿分散剂、增稠剂等助剂的品种及用量进行了研究。通过大量的复配试验确定了最佳配方:原药35%、润湿分散剂8.5%、增稠剂0.25%、防冻剂4%,消泡剂1%、稳定剂1.5%,去离子水补至100%。  相似文献   

10.
本文对氧氟·甲戊灵34%悬浮剂的配方进行了研究,对润湿分散剂、增稠剂、防冻剂等进行了筛选,确定了配制方法和较佳配方组成.试验结果表明:该配方产品质量稳定.各项指标和贮存稳定性符合悬浮剂的要求.  相似文献   

11.
The combined efficacy of spinosad and chlorpyrifos-methyl was determined against four storage psocid pests belonging to genus Liposcelis. This research was undertaken because of the increasing importance of these psocids in stored grain and the problem of finding grain protectants to control resistant strains. Firstly, mortality and reproduction were determined for adults exposed to wheat freshly treated with either spinosad (0.5 and 1 mg kg(-1)) or chlorpyrifos-methyl (2.5, 5 and 10 mg kg(-1)) or combinations of spinosad and chlorpyrifos-methyl at 30 degrees C and 70% RH. There were significant effects of application rate of spinosad and chlorpyrifos-methyl, both individually and in combination, on adult mortality and progeny reduction of all four psocids. Liposcelis bostrychophila Badonnel and L. decolor (Pearman) responded similarly, with incomplete control of adults and progeny at both doses of spinosad but complete control in all chlorpyrifos-methyl and combined treatments. In L. entomophila (Enderlein) and L. paeta Pearman, however, complete control of adults and progeny was only achieved in the combined treatments, with the exception of spinosad 0.5 mg kg(-1) plus chlorpyrifos-methyl 2.5 mg kg(-1) against L. entomophila. Next, combinations of spinosad (0.5 and 1 mg kg(-1)) and chlorpyrifos-methyl (2.5, 5 and 10 mg kg(-1)) in bioassays after 0, 1.5 and 3 months storage of treated wheat were evaluated. The best treatment was 1 mg kg(-1) of spinosad plus 10 mg kg(-1) of chlorpyrifos-methyl, providing up to 3 months of protection against infestations of all four Liposcelis spp. on wheat.  相似文献   

12.
对甜菜夜蛾的毒力测定结果表明,多杀菌素能显著降低其初孵幼虫的存活率、成虫的产卵量和成虫寿命。经6.25 μg/mL药液处理的卵,其初孵幼虫存活率仅为7.48％,而对照则为76.72％;取食12.50 μg/L药液的成虫,其产卵量和成虫寿命仅为取食蜂蜜水的1/6和1/2.5。随虫龄的增加,甜菜夜蛾幼虫对多杀菌素的敏感性显著降低,3龄、4龄幼虫的敏感性仅为2龄幼虫的1/9和1/16,且增效剂氧化胡椒基丁醚(PBO)与磷酸三苯酯(TPP)表皮点滴处理不表现增效作用。多杀菌素对甜菜夜蛾卵的孵化率、蛹重以及蛹的羽化率没有明显影响。亚致死剂量处理3龄幼虫后,其体内超氧化物歧化酶、过氧化氢酶和过氧化物酶等主要保护酶系的活性在处理后0~24 h与对照差异不明显,保护酶系与甜菜夜蛾对多杀菌素敏感性之间没有明显关系。  相似文献   

13.
多杀菌素微球制备关键工艺研究:Ⅱ   总被引：4，自引：3，他引：1  
采用乳化-溶剂挥发法,以聚乳酸(PLA)为成球材料(壁材)制备了多杀菌素微球。研究了PLA浓度和油/水相体积比对多杀菌素微球制备的影响规律,确定了制备多杀菌素微球的优选配方及工艺条件。制备得到中位径(D50)为12.73 μm、跨距为1.4811、载药量在31%左右、包封率为100.2%、包封产率为89.4%的多杀菌素微球,重复性良好。扫描电镜(SEM)观察结果表明,所得微球为表面较光滑的实心小圆球。差示扫描量热(DSC)分析结果证实,多杀菌素和PLA的确形成了载药微球。室内毒力测定结果表明,自制5%多杀菌素微球悬浮剂与市售2.5%多杀菌素悬浮 剂(菜喜)对小菜蛾Plutella xylostella 2龄幼虫的毒力基本相同,LC50值分别为0.40和0.38 μg/mL。  相似文献   

14.
分别采用触杀毒力法和摄食毒力法测定了多杀霉素和甲氨基阿维菌素苯甲酸盐对小菜蛾的室内生物活性,研究结果表明：药后48h,甲维盐的触杀活性和胃毒活性均好于多杀霉素。另外,2种药剂的胃毒活性均好于触杀活性。田间药效试验结果表明,多杀霉素2.5%悬浮剂对小菜蛾幼虫表现出优良的防治效果。在小菜蛾发生期,以15.00～19.99ga.i./hm2兑水均匀喷雾,施药后7d,防治效果可达90%以上。用甲氨基阿维菌素苯甲酸盐2%乳油（对照药剂）常规使用剂量喷雾,最高防治效果达85%以上,稍逊于多杀霉素2.5%悬浮剂。  相似文献   

15.
BACKGROUND: Upon emergence from their pupal cells, bollworm, Helicoverpa zea (Boddie), adults actively seek and feed on plant exudates before they disperse and reproduce on suitable host plants. This nocturnal behavior of the bollworm may be exploited as a pest management strategy for suppression of the insect by using an attractant/stimulant mixed with an insecticide to induce feeding to cause adult mortality or reproductive reduction/inhibition. This study aimed to determine in the laboratory whether or not spinosad when mixed with sucrose solution as a feeding stimulant and ingested by bollworm could influence mortality and reproduction of the insect. RESULTS: Sublethal concentrations of spinosad fed to laboratory‐reared females confined with males significantly reduced percentage hatch of eggs at 0.1 mg L?1, and it was reduced to near zero at 2.5 mg L?1 when compared with females fed 2.5 M sucrose solutions only. The lethal concentration (LC99) for males captured from the field in sex‐pheromone‐baited traps was 73 mg L?1 for 24 h response. Proboscis extension response was not inhibited significantly even at 10 g L?1. In spite of a 137‐fold increase in lethal dose concentration, spinosad did not inhibit feeding. CONCLUSION: A detailed study of laboratory‐reared and field‐collected bollworm adults relative to mortality and reproduction after ingestion of spinosad indicates that spinosad would be useful in an attract‐and‐kill strategy to control the insect when mixed with a feeding attractant/stimulant. Field validation of the data is warranted. Published 2010 by John Wiley & Sons, Ltd.  相似文献   

16.
BACKGROUND: Field trials were conducted during the wet and dry seasons in periurban and semi‐rural cemeteries in southern Mexico to determine the efficacy of a suspension concentrate formulation of spinosad (Tracer 480SC) on the inhibition of development of Aedes albopictus L. and Ae. aegypti Skuse. For this, oviposition traps were treated with spinosad (1 or 5 mg L?1), Bacillus thuringiensis israelensis (Bti, VectoBac 12AS), a sustained release formulation of temephos and a water control. RESULTS: Ae. albopictus was subordinate to Ae. aegypti during the dry season, but became dominant or codominant during the wet season at both sites. The two species could not be differentiated in field counts on oviposition traps. Mean numbers of larvae + pupae of Aedes spp. in Bti‐treated containers were similar to the control at both sites during both seasons. The duration of complete absence of aquatic stages varied from 5 to 13 weeks for the spinosad treatments and from 6 to 9 weeks for the temephos treatment, depending on site, season and product concentration. Predatory Toxorhynchites theobaldi Dyar and Knab suffered low mortality in control and Bti treatments, but high mortality in spinosad and temephos treatments. Egg counts and percentage of egg hatch of Aedes spp. increased significantly between the dry and wet seasons, but significant treatment differences were not detected. CONCLUSION: Temephos granules and a suspension concentrate formulation of spinosad were both highly effective larvicides against Ae. aegypti and Ae. albopictus. These compounds merit detailed evaluation for inclusion in integrated control programs targeted at Ae. aegypti and Ae. albopictus in regions where they represent important vectors of human diseases. Copyright © 2010 Society of Chemical Industry  相似文献   

17.
3种环境友好型药剂对西花蓟马的室内毒力与田间防效   总被引：3，自引：0，他引：3  
测定了3种杀虫剂对西花蓟马的室内毒力和田间防效。室内生物测定结果表明,多杀菌素、甲氨基阿维菌素苯甲酸盐、阿维菌素对西花蓟马成虫的LC50值为0.050～2.887mg/L,对西花蓟马若虫的LC50值为0.040～0.457mg/L;田间药效试验表明,田间防治西花蓟马时推荐使用剂量(防效>80%)分别为:2.5%多杀菌素悬浮剂30～60g/667m2,1%甲氨基阿维菌素苯甲酸盐乳油30～60g/667m2,1.8%阿维菌素乳油不可低于75g/667m2。  相似文献   

18.
采用溶剂蒸发法制备了多杀菌素·甲氨基阿维菌素苯甲酸盐聚乳酸微球,考察了内相聚乳酸浓度(X1)、理论载药量(X2)和搅拌速率(X3)对微球载药量、包封率、粒径、跨距及5 d释放率的影响。用数学方法将试验设计中的多指标"归一"化,采用中心多点等距设计法,对各指标以及总评"归一值"进行二项式拟合,描绘三维效应面,用Design-expert V8.06软件对总评"归一值"较佳的试验条件进行预测。结果表明,当聚乳酸质量浓度和搅拌速率减小、以及理论载药量增大时,总评"归一值"增大。经预测,当聚乳酸质量浓度为77.79 mg/mL、理论载药量(质量分数)为51.06%、搅拌速率为560.91 r/min时,总评"归一值"理论值达到最大(0.681 1)。依据上述较佳条件制备的微球总评"归一值"实测值为0.630 8,与理论预测值的偏差为-5.03%,其中包封率为84.49%,粒径7.19μm,跨距为1.134,5 d释放率为52.95%。微球表面光滑,DSC测试结果表明,其有效成分与微球骨架结合完好。表明研究建立的数学模型可用来预测多杀菌素·甲氨基阿维菌素苯甲酸盐聚乳酸微球的较优配方。  相似文献   

19.
A laboratory study was undertaken to determine the persistence and efficacy of spinosad against Rhyzopertha dominica (F.) in wheat stored for 9 months at 30 degrees C and 55 and 70% relative humidity. The aim was to investigate the potential of spinosad for protecting wheat from R. dominica during long-term storage in warm climates. Wheat was treated with spinosad at 0.1, 0.5 and 1 mg kg(-1) grain and sampled after 0, 1.5, 3, 4.5, 6, 7.5 and 9 months of storage for bioassays and residue analyses. Residues were estimated to have declined by 30% during 9 months of storage at 30 degrees C and there was no effect of relative humidity. Spinosad applied at 0.5 or 1 mg kg(-1) was completely effective for 9 months, with 100% adult mortality after 14 days of exposure and no live F1 adults produced. Adult mortality was <100% in some samples of wheat treated with 0.1 mg kg(-1) of spinosad, and live progeny were produced in all samples treated at this level. The results show that spinosad is likely to be an effective grain protectant against R. dominica in wheat stored in warm climates.  相似文献   

20.
为研究不同种类植物油对刺糖多孢菌生长及其合成多杀菌素能力的影响,探索提高多杀菌素产量的方法,在发酵培养基中分别添加葵花油、花生油、大豆油、芝麻油、橄榄油和菜籽油,研究了其对菌体生长、脂肪酶活性和多杀菌素产量的影响,并利用RT-PCR对脂肪酶基因及多杀菌素合成相关基因的转录水平进行分析。结果表明:6种供试植物油对菌体生长和多杀菌素产量的影响程度不同,依次为菜籽油橄榄油花生油芝麻油葵花油大豆油,其中菜籽油有利于诱导脂肪酶的表达、延缓菌体的衰亡和延长产素期,脂肪酶活力、菌体生物量和多杀菌素产量分别提高310.09%、8.97%和33.94%;脂肪酶基因和多杀菌素合成基因的转录强度也有明显提高。因此,菜籽油是其最佳的辅助性脂类碳源。  相似文献   

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