甲黄隆防除麦田杂草的效果及安全用药技术

甲黄隆代号DPX6376,它与绿黄隆一样,是一种磺酰胺脲类超高效、超低量的麦田新型除草剂,由于甲黄隆对下茬作物的安全性比绿黄隆好,因此深受麦稻耕作制农区群众的欢迎。但是甲黄隆对麦苗的安全性比绿黄隆差,     

磺酰脲类除草剂绿黄隆,醚苯黄隆在高含有机质火山源土壤中的降解研究

绿黄隆、醚苯黄隆是广泛用于各种作物田防除杂草的磺酰脲类除草剂。在新西兰,绿黄隆登记用于小麦、大麦和燕麦作物防除阔叶杂草,并占有当前市场的很大份额。醚苯黄隆是选择性芽后除草剂,用于防除小麦、大麦田一年生阔叶杂草。 绿黄隆、醚苯黄隆都是高效除草剂,通常用量为10～40克有效成份/公顷。均由化学水     

高效液相色谱法测定混配除草剂中环嗪酮和绿黄隆

本文报道采用Ｎｏｖａ－Ｐａｋ Ｃ１８不锈钢柱，进行反相高效液相色谱分析，以内标法定量，测定了混配林用除草剂中环嗪酮和绿黄隆的含量，结果表明，各有效成份与内标物色谱峰分离完全，杂质无干扰。测定结果，环嗪酮和绿黄隆的变异系数分别为０．９８％和１．１２％，回收率分别为９８．６－９８．８％和９９．４－１０１．２％。     

乙草胺与绿黄隆混配防除麦田杂草试验

乙草胺与绿黄隆混配，可一次性防除稻麦水旱轮作区麦田单、双子叶杂草。试验结果表明：每亩以２０％乙草胺１００克与２５％绿黄隆１．６克及２０％乙草胺７５克与２５％绿黄隆２克混用，除草保产效果明显，对单、双子叶杂草综合防效可达９０％左右。     

50%麦草净高效液相色谱分析

本文报道采用Ｎｏｖａ－ＰａｋＣ１８不锈钢色谱柱进行反相液相色谱分析,以Ｖ（甲醇）∶Ｖ（水）＝６５∶３５（ｐＨ＝３）为流动相,以邻苯二甲酸二乙酯为内标物,用内标法测定田草净除草剂中绿黄隆和异丙甲草胺的含量。结果表明,各有效成分与内标物色谱峰分离完全,杂质无干扰,测定结果,绿黄隆和异丙甲草胺的变异系数为１．１４％和０．５０％。回收率分别为：９９．０％～１０１．４％和９８．３％～１００．６％     

绿黄隆,甲黄隆防除麦田杂草试验

近年来,麦田草害问题已成为小麦高产栽培中亟待解决的一个重大课题。为寻求高效、安全、低毒、杀草谱广的新型除草剂。1989～1990年度我们在本校农场进行了绿黄隆、甲黄隆防除麦田杂草的应用试验研究,现将试验结果总结如下。     

苯黄隆防除麦田杂草试验

苯黄隆是继绿黄隆、甲黄隆后的又一种磺酰脲类超高效麦田除草剂。据资料介绍,苯黄隆在土壤中的持效期较绿黄隆、甲黄隆短。为探明该药的杀草活性,最佳使用剂量及对小麦和后茬作物的安全性,受化工部沈阳化工研究院和河北省宣化农药厂的委托,我们于1991～1992年进行了苯黄隆防除麦田杂草试验,现报道如下。     

百草敌与甲,绿黄隆混配防除麦田杂草试验

百草敌与甲、绿黄隆混配防除麦田杂草试验孙广仲，仇光灿，成晓松（盐城市郊区秦南病虫测报站，２２４０２１）为了减少用药次数，达到一次用药即可解决麦田混生杂草为害的目的，针对甲黄隆、绿黄隆、百草敌等除草剂对禾本科及阔叶杂草具有不同的防除效果的特点，通过混配...     

辽中化工总厂引进“三黄”除草剂

沈阳市辽中化工总厂引进“三黄”(稻黄隆、绿黄隆、甲黄隆)杀草剂农药,目前正投入紧张的施工阶段。“三黄”对除禾本科恶性杂草,有显著的     

高效液相色谱分析除草王

本文介绍了高效液相色谱分析除草王可湿性粉剂有效成分甲黄隆、苄嘧黄隆、乙草胺含量的方法，采用ＣＬＣ－ＯＤＳ色谱柱，以水和甲醇作流动相，在２５４纳米下检测，外标法定量。甲黄隆、苄嘧黄隆、乙草胺变异系数（％）分别为０．７４、０．６３、０．８１，线性相关系数分别为０．９９８２、０．９９９５、０．９９９６，保留时间分别为４．８、８．５、１５．５分。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。