枸杞炭疽病室内药剂筛选及田间药效防治试验

采用抑菌圈测定方法,测定了9种药剂对枸杞炭疽病菌的抑菌作用,有5种药剂明显抑制枸杞炭疽病菌,以40%氟硅唑EC和40%疽击DP对枸杞炭疽病抑菌作用良好。田间试验表明,40%氟硅唑EC800倍液防治效果达84.85%,40%疽击DP1500倍液防治效果达91.11%。     

8种药剂防治梨黑星病田间药效试验

试验表明 :5 0 %多·福WP40 0倍、5 0 %腈·锰锌WP80 0～ 10 0 0倍、4%己唑醇EC10 0 0～15 0 0倍、12 5 %烯唑醇WP2 5 0 0倍、12 5 %腈菌唑EC2 5 0 0倍对梨黑星病防治效果显著 ,叶病和果病防效分别为 75 4%～ 83 9%和 82 8%～ 88 2 %。施用适期在每次雨后 7d内 ,每次间隔 15天左右。     

防治小菜蛾药剂筛选试验

由于小菜蛾极易产生抗药性,本县有机磷、氨基甲酸酯、拟除虫菊酯等药剂已无防效,卡死克经过３年应用效果亦极差。１９９８年我们对５％抑太保等５种药剂筛选表明：５０％宝路、０．６％剂螨毒、５％锐劲特、５％抑太保４种药剂药后６天效果达９５．４３％￣１００％;叶片为害率仅１４．３１％￣１７．７３％,为害比卡死克减轻６２．８８％￣７０．１４％,比对照减轻７４．７２￣７９．６０％。     

关于油田油井药剂筛选的探讨

在油田开发过程中,油井受到稠油、腐蚀、结蜡等因素的影响,致使油井负荷上升、偏磨、腐蚀、蜡卡等不良后果．造成杆管泵漏失断脱、能耗加大、产量降低。以下是针对不同危害机理。筛选不同的药剂,减少以上因素对油井的危害。     

防治啤酒大麦条纹病药剂筛选试验

大麦条纹病(Drachslera gramineum)是一种种传系统性病害。近年来,随着甘肃河西走廊啤酒大麦种植面积的逐年扩大和品种的日趋繁杂,使大麦条纹病急骤蔓延。据1987、1988两年调查统计,每年发病面积达10万亩,     

防治甜菜夜蛾药剂筛选试验

从１９９４－１９９６年通过室内和紧地１４种常规和断引进药剂进行防治香叶甜菜夜蛾试验筛选,结果以１．８％爱福丁、３５％克蛾室、５％氟虫脲、１．８％阿巴丁和５．７％氟氯氰菊酯防效较好,防铲达８０％以上;而４０％水胺硫磷、９８％巴丹、２０％甲氰菊醌 、８％杀虫双、４５％马拉硫磷、３０％氧乐查、Ｂ．ｔ．乳剂、３％顺式氯氰菊酯２０％三氟氯氰菊酯等防效相对较差,仅在３３．０６－６８．９５％之间。     

大白菜黑斑病防治药剂筛选初极

黑斑病是大白菜的常发病害。近年来,在我国北方菜区,危害越来越重。1987～1988年,在西安市和咸阳市杨陵区,田间病情指数分别为49.1和66.7(发病率100%),重病田病情指数92,损失10～30%,已成为影响白菜生产的重要病害。1988～1989年,我们在进行黑斑病抗病育种的同时,还进行了黑斑病防治农     

防治甘草锈病的药剂筛选

[目的]解决防治甘草锈病药剂品种单一的问题。[方法]通过4种药剂对甘草锈菌室内毒力测定和甘草锈病田间防治试验,进行防治甘草锈病有效药剂筛选。[结果]甘草锈菌对50%醚菌酯WG最为敏感,有效成分LD50值为0.743 9 mg/kg,50%醚菌酯WG在田间防效评价中也表现最好,药后20 d防效达63.78%。[结论]50%醚菌酯WG是防治甘草锈病的理想药剂。     

防治何首乌叶斑病的室内药剂筛选

对何首乌叶斑病症状及其病原形态进行了观察,并对其病原菌进行分离与纯化、培养、鉴定及室内药剂筛选。经鉴定,何首乌叶斑病病原菌为掌状拟盘多毛孢[Pestalotiopsis palmarum（Cke．）Stey．]。室内5种药剂筛选试验结果表明：抑制该菌丝生长效果较好的杀菌剂是70％甲基硫菌灵WP,抑菌率达100％,其它药剂抑菌效果不明显。     

小麦腥黑穗病防治药剂筛选试验研究

为了筛选有效防治腥黑穗病的药剂,进行了数种药剂种子处理控制小麦腥黑穗病的试验。经过盆栽试验和田间试验,发现2．5％适乐时种衣剂、12．5％禾果利（烯唑醇）可湿性粉剂和40％卫福种衣剂对小麦腥黑穗病的病穗减退率分别为97．4％、94．7％和95．8％,可有效控制小麦腥黑穗病的发生危害。     

杀菌剂对巴西橡胶棒孢霉落叶病菌的室内毒力测定

由多主棒孢引起的巴西橡胶棒孢霉落叶病是我国天然橡胶生产的潜在威胁。在室内采用菌丝生长速率法测定了11种杀菌剂对多主棒孢的抑菌能力,结果表明,50%多菌灵WP和70%甲基硫菌灵WP的EC50最小,且病菌对它们的敏感性较高,抑菌效果最好;25%丙环唑EC和40%氟硅唑EC的EC50较小,病菌对它们的敏感性也较高,抑菌效果较好;80%乙蒜素EC的EC50最大,病菌对它的敏感性也较低,抑菌效果最差。     

桑褐斑病化学防治药剂筛选及综合防治对策探讨

应用10种杀菌剂防治桑树褐斑病,田间小区试验结果表明:25%丙环唑乳油、10%苯醚甲环唑水分散粒剂对桑褐斑病有比较优异的防治效果,与其他药剂相比效果极显著且药效稳定,并对家蚕安全无毒,值得在大面积推广应用.使用25%丙环唑乳油、10%苯醚甲环唑水分散粒剂防治桑褐斑病,推荐使用浓度25%丙环唑乳油500μg/ml(有效成分,下同)、10%苯醚甲环唑水分散粒剂22.22μg/ml,施药3～4次.在化学药剂防治同时,结合清除病源、栽植抗病强的桑品种、加强桑园管理、改善桑园通风透光条件等综合措施,可获得理想的防治效果.     

猕猴桃叶斑病防治药剂筛选

[目的]为筛选猕猴桃叶斑病的防治药剂.[方法]采用菌丝生长速率法测定11种药剂对可可毛色二孢菌的室内生物活性,筛选6种抑菌效果较好的药剂进行田间药效试验.[结果]29％吡萘·嘧菌酯SC、36％喹啉·戊唑醇SC对该菌的抑制效果最强,EC50值分别为0.1826、0.6338 mg/L,田间防效分别为78.88％、77.9...     

几种杀菌剂对芦荟黑斑病菌室内活性测定

通过供试的7种药剂对芦荟黑斑病菌体外抑制作用测试结果表明,所有药剂对其孢子萌发都有不同程度的抑制作用,其中异菌脲、咪鲜胺、嘧霉胺的抑制效果要优于氟硅唑、代森锰锌、百菌清、苯醚甲环唑;7种药剂对芦荟黑斑病菌菌丝体的抑制作用测定结果显示,所有药剂对菌丝生长都有显著的抑制作用,其中咪鲜胺锰络合物可湿性粉剂对菌丝体抑制效果最好,抑菌率达84.24%;异菌脲、氟硅唑、苯醚甲环唑次之。     

香蕉型弛张筛3mm干法脱粉在寺河矿选煤厂的应用

为提高物料干法筛分效果,在论述香蕉型弛张筛工作原理和特点的基础上,分析了香蕉型弛张筛3 mm干法脱粉技术在寺河矿选煤厂的应用情况。结果表明:香蕉型弛张筛处理量大,比圆振动弛张筛提高30%以上,可实现物料快速分层,提高透筛率;单台带煤量约320~350 t/h;3 mm筛下限上率3.2%,上层限下率23.1%,下层限下率21.3%;筛分效率达85%,对黏性成团物料具有更好的筛分效果;香蕉型弛张筛安装角度小,占用空间少,改造成本低,降低水耗、电耗、介耗;煤泥量、絮凝剂用量、凝聚剂用量分别减少11.25万、22.50、281.25 t/a,增加经济效益5355.01万元。使用香蕉型弛张筛进行3 mm深度筛分具有可行性。     

现代杀菌剂抗性研究进展

使用现代杀菌剂防治植物病害是保证农作物高产、稳产的重要措施之一,但是现代杀菌剂很容易出现抗性而导致化学防治失败,农业生产蒙受巨大损失。从杀菌剂的抗性发生现状、抗性机制、抗性检测和治理技术等方面概述了甲氧基丙烯酸酯类、脱甲基抑制剂、苯并咪唑类、苯基酰胺类和二甲酰亚胺类杀菌剂的抗性研究进展。     

Some fatty esters as plasticizers and fungicides for natural rubber

The prepared n-fatty alcohols from petroleum sources are esterified with a dibasic acid series (malonic, succinic, glutaric and adipic) or phthalic anhydride, giving the corresponding C₁₂ fatty esters. The prepared C₁₂ fatty esters were formulated with natural rubber. The drying time, some mechanical properties and fungitoxicity of the prepared film samples were examined. The conventional dibutyl phthalate plasticizer was used for the purpose of comparison. The data obtained indicate that the prepared fatty esters can be used as plasticizers with antifungal activity for natural rubber. ©1997 SCI     

PVC生产中黑黄点的产生及预防

从原料、聚合、汽提、干燥等方面介绍了上海氯碱化工股份有限公司在PVC生产中黑黄点产生的原因及预防措施。     

Development of proteomics-based fungicides: new strategies for environmentally friendly control of fungal plant diseases

Proteomics has become one of the most relevant high-throughput technologies. Several approaches have been used for studying, for example, tumor development, biomarker discovery, or microbiology. In this "post-genomic" era, the relevance of these studies has been highlighted as the phenotypes determined by the proteins and not by the genotypes encoding them that is responsible for the final phenotypes. One of the most interesting outcomes of these technologies is the design of new drugs, due to the discovery of new disease factors that may be candidates for new therapeutic targets. To our knowledge, no commercial fungicides have been developed from targeted molecular research, this review will shed some light on future prospects. We will summarize previous research efforts and discuss future innovations, focused on the fight against one of the main agents causing a devastating crops disease, fungal phytopathogens.     

Processes for controlling the structure and texture of dehydrated banana

This study is about how to control the microstructure of dehydrated banana during drying by a multi-flash drying process. The influence of different drying methods and process variables on the formation of fruit microstructure and texture were evaluated. These processes included a conductive multi-flash drying process, conductive multi-flash drying combined with classical vacuum drying, convective drying in an oven, and vacuum drying. Density, porosity, and shrinkage of dehydrated fruit were strongly influenced by the drying process. Results showed that it is possible to control the porous structure of dehydrated banana by choosing the correct dehydration process.