“瑞奇”高效有机肥对当归产量及构成因素的研究     

邱黛玉  蔺海明  王福安  何春雨  漆琚涛  马占川 《勤云标准版测试》2005,(3)

研究了施用新型高效有机肥料对当归根的形态﹑根重﹑产量以及麻口病害发生率的影响。结果表明:施用高效有机肥处理的鲜、干芦头径分别为3.67cm和2.57cm,较施用化肥处理增大10.54%和7.08%,鲜、干主身径分别提高7.69%、6.60%;单根干重为38.82,比化肥处理增大15.02%,平均“干/鲜”比增加了40%;施用高效有机肥处理的成苗率提高了4.11%,干归公顷产量也高于化肥处理,达到2371.84kg/hm2;施用高效有机肥处理的麻口病发病率为6.95%,低于施用化肥处理17.04%,有利于当归的高产、优质栽培。  相似文献   

大蒜线虫蔬菜寄主调查   总被引：1，自引：0，他引：1  

杨有权  李佳宁 《长江蔬菜》1996,(9):15-17

通过对５种大蒜线虫即洋葱茎线虫、甘薯茎线虫、马铃铃薯线虫、根腐线虫、肾形线虫在多种蔬菜上的接种试验，弄清了其蔬菜寄主范围。从而得出结论：在大蒜栽培中通过大蒜与其它蔬菜之间轮作或不同蔬菜轮作防治大蒜线虫是不可行的，只能药剂和生物防治。  相似文献   

Preliminary study on the use of synthetic substrate for juvenile stage production of the yabby, Cherax destructor (Clark) (Decapoda: Parastacidae)     

P L Jones  T Thanuthong  & P Kerr 《Aquaculture Research》2002,33(10):811-818

Juvenile Cherax destructor (commonly called the yabby) (mean weight 48.3 mg) were cultured intensively (stocking density 360/m²) under controlled conditions for 48 days. The animals were provided with a combination of food (high protein pellets and/or natural feed organisms attached to a conditioned synthetic substrate) and refuge. Fastest growth and highest yield was recorded when both pellets and the conditioned synthetic material were provided. Although the yabbies sheltered in the synthetic substrate, it did not increase survival. Juvenile yabbies (< 200 mg) were able to graze on small organisms attached to the synthetic material but this ability appeared to decline as the yabbies grew to a larger size. The use of artificial substrates in the intensive nursery phase production of juvenile freshwater crayfish is discussed.  相似文献   

Testing new compounds for efficacy against Varroa destructor and safety to honey bees (Apis mellifera)     

Cameron J Jack  Kaylin Kleckner  Fabien Demares  Leslie C Rault  Troy D Anderson  Paul R Carlier  Jeffrey R Bloomquist  James D Ellis 《Pest management science》2022,78(1):159-165

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瑞香狼毒根提取物及不同溶剂萃取物对马铃薯腐烂茎线虫触杀活性研究   总被引：1，自引：0，他引：1  

郭霞  丁文姣  杨甲月  徐蕊  燕志强  秦波 《植物保护》2011,37(1):128-131

采用实验室活体生物试验方法,测定和比较了瑞香狼毒乙醇提取物及不同极性溶剂萃取物对马铃薯腐烂茎线虫的触杀活性。结果表明,瑞香狼毒根乙醇提取物及其石油醚、氯仿、乙酸乙酯及水相萃取物对马铃薯腐烂茎线虫有不同程度的触杀活性,其中乙酸乙酯萃取物对马铃薯腐烂茎线虫的触杀活性最强,显著高于其他萃取物。随着处理浓度的增大和处理时间的增长,该萃取物对线虫的触杀活性明显增强,表现出良好的量效关系。  相似文献   

An exposure study to assess the potential impact of fipronil in treated sunflower seeds on honey bee colony losses in Spain     

Bernal J  Martin-Hernandez R  Diego JC  Nozal MJ  Gozalez-Porto AV  Bernal JL  Higes M 《Pest management science》2011,67(10):1320-1331

BACKGROUND: There is great concern about the high losses and strong depopulation of honey bee colonies in some areas of Spain. Some beekeepers have suggested that sunflower seeds treated with the insecticide fipronil could be an important factor in causing those losses. Therefore, an in‐depth field study has been carried out in two regions of Spain where sunflower production is intense (Cuenca and Andalucía) and where, for some crops and varieties, fipronil has been used as seed insecticide. RESULTS: Samples of adult bees and pollen were analysed for bee pathogens and pesticide residues respectively. Neither fipronil residues nor its metabolites were detected in any of the samples analysed, indicating that short‐term or chronic exposure of bees to fipronil and/or its metabolites can be ruled out in the apiaries surveyed. Varroa destructor and Nosema ceranae were found to be very prevalent. CONCLUSION: The combination of the two pathogens could augment the risk of colony death in infected colonies, without fipronil residues exerting a significant effect in the given field conditions. Indeed, in this study the losses observed in apiaries located close to sunflower crops were similar to those in apiaries situated in forested areas with wild vegetation. Copyright © 2011 Society of Chemical Industry  相似文献   

腐烂茎线虫对花生的致病性   总被引：1，自引：0，他引：1  

程云  张绍升 《福建农林大学学报(自然科学版)》2007,36(5):454-457

盆栽接种试验表明,侵染甘薯的腐烂茎线虫对花生具有显著的致病性.该线虫可以侵染花生的根系、果针和荚果,果针受害最重,影响饱果率和荚果重量.不同花生品种对腐烂茎线虫的抗性和症状表现出一定的差异.  相似文献   

危害马铃薯的茎线虫分离鉴定   总被引：3，自引：0，他引：3  

郭全新  简恒 《植物保护》2010,36(3):117-120

本文对采自河北张家口市察北区、危害马铃薯的线虫(编号De-Chabei)进行了形态及分子生物学鉴定,形态测量结果表明其与马铃薯腐烂茎线虫(Ditylenchus destructor Thorne)一致,采用通用引物rDNA1/rDNA2扩增rD-NA-ITS区的长度为1130bp,测序比对以及采用马铃薯茎线虫B型特异性引物DdL1/DdL2扩增得到485bp特异性片段,表明与B型或L型马铃薯腐烂茎线虫一致;再次证明该型线虫在河北马铃薯主产区的分布和危害。  相似文献   

Bioinformatics‐assisted characterization of the ITS1‐5·8S‐ITS2 segments of nuclear rRNA gene clusters,and its exploitation in molecular diagnostics of European crop‐parasitic nematodes of the genus Ditylenchus     

M. Marek  M. Zouhar  O. Douda  J. Mazakova  P. Rysanek 《Plant pathology》2010,59(5):931-943

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蜂螨的种类及蜜蜂主要害螨研究进展   总被引：3，自引：0，他引：3  

罗其花  周婷  王强  代平礼  吴艳艳 《中国农业科学》2010,43(3):585-593

蜂螨是一类危害严重的蜜蜂寄生虫。随着蜂螨抗药性的产生和危害的加重,现已引起各国养蜂业的高度重视。本文从4个方面综述了近年来与蜂螨相关的研究进展:①蜂螨的种类;②重要蜜蜂害螨武氏蜂盾螨(Acarapis woodi),狄氏瓦螨(Varroa destructo)和小蜂螨(Tropilaelaps spp.)的分布、生物学特性、危害和防治方法;③与蜂螨相关的蜜蜂信息素研究;④与蜂螨相关的蜜蜂病害研究;并对今后蜂螨的研究趋势和方向进行了讨论。  相似文献