新杀菌剂5%广枯灵水剂对稻瘟病菌的室内毒力测定   总被引：1，自引：0，他引：1  

刘燕黔  袁洁  杨学辉 《云南农业大学学报(自然科学版)》2000,15(3):242-244

 室内5%广枯灵水剂对水稻稻瘟病菌菌丝、孢子的毒力测定结果表明:新杀菌剂5%广枯灵水剂不但能抑制稻瘟病菌菌丝的生长,而且对稻瘟病孢子萌发的抑制作用较好。5%广枯灵水剂100 mg／L的抑菌效果为67.1%;400 mg／L的抑菌效果可达100%。对照药剂20%三环唑400 mg／L 的抑菌效果仅为84.4%,5%广枯灵水剂对稻瘟病菌孢子萌发的BC₅₀值47.99 mg／L;20%三环唑BC₅₀值56.43 mg／L;5%广枯灵水剂抑制稻瘟病菌菌丝生长,抑制稻瘟病菌孢子萌发以及BC₅₀值均明显好于当前广泛使用的20%三环唑。  相似文献   

几种杀菌剂对猕猴桃主要真菌性叶斑病菌的室内毒力测定     

阳廷密 《中国果业信息》2014,43(3)

猕猴桃假尾孢Psedocercospora actinidiae Deighton和叶点霉菌Phyllosticta sp．是引起猕猴桃生长期的两种主要真菌病害。为了能筛选到对猕猴桃假尾孢和叶点霉菌具有高效抑制作用的杀菌剂,本文采用茵丝生长速率法测定了几种杀菌剂的毒力,结果表明,除腈菌唑外其余几种杀菌剂均可作为猕猴桃主要叶斑病的田间药效试验的首选药剂。  相似文献   

The effects of various plant protection methods on the development of Zymoseptoria tritici and Cephalosporium gramineum,grain yield and protein profile     

Urszula Wachowska  Iwona Konopka  Adrian Duba  Klaudia Goriewa 《国际虫害防治杂志》2019,65(2):105-113

Septoria leaf blotch progresses rapidly, leading to the development of Zymoseptoria titici forms resistant to fungicides. Cephalosporium stripe is caused by Cephalosporium gramineum. The aim of this study was to evaluate the effectiveness of selected pesticides in limiting the symptoms of both diseases on winter wheat leaves, and to determine their influence on grain yield and the content and composition of protein fractions in wheat kernels. Propiconazoles were most effective in inhibiting the development of Septoria leaf blotch (symptoms were reduced from 54.7% to 78.6%). Strobilurins were less effective due to the presence of isolates with the G143A mutation. Symptoms of Cephalosporium stripe were rarely observed, and protective treatments did not reduce their severity. The highest content of grain protein (14.81%) was found in plants most intensely protected with the fungicides containing fenpropimorph, pyraclostrobin and epoxiconazole. The principal component analysis revealed that the plant protection method influenced the grain protein profile. The accumulation of HMW glutenins and α/β gliadins was mutually interrelated and higher in high-input treatments; control grain was characterized by close relationships between ω-gliadins, LMW glutenins, albumins and globulins, whereas low-input treatments influenced mostly γ-gliadins.  相似文献   

Control of Helminthosporium leaf blight of spring wheat using seed treatments and single foliar spray in Indo-Gangetic Plains of Nepal     

《Crop Protection》2016

Four fungicides for seed treatments and one as foliar spray were tested in replicated field experiments in a strip plot design to determine the effect of fungicides on Helminthosporium leaf blight (caused by Cochliobolus sativus and Pyrenophora tritici-repentis) severity and grain yield of wheat. Wheat seed cv. RR 21 was treated with fungicides, carbendazim (Areestin), triadimenol (Baytan), tebuconazole (Raxil), and carboxin + thiram (Vitavax 200B). Single foliar application of propiconazole (Tilt) was sprayed at flowering stage. Controls were included for both factors and treatments were replicated four times. Triadimenol and carboxin + thiram increased seed germination in both years. Triadimenol, tebuconazole, and carboxin + thiram reduced the number of infected seedlings and seedling root rot severity in both years. Number of tillers was higher in carboxin + thiram treated plots compared to other seed treatments. Compared to the control, carboxin + thiram increased grain yield by 9% and 8% in 2004 and 2005, respectively, and triadimenol by 6% in both years. The foliar spray of propiconazole significantly reduced Helminthosporium leaf blight severity and increased thousand-kernel weights. Propiconazole spray increased grain yield by 15% and 14% in 2004 and 2005, respectively. Therefore, seed treatment either with triadimenol or carboxin + thiram in combination with single post-flowering foliar spray of fungicides should minimize grain yield loss due to wheat foliar blight in South Asia. The findings of this study could be useful in developing strategies to manage Helminthosporium leaf blight in South Asia and other warm wheat growing regions of the world.  相似文献   

Effects of fungicides on the occurrence of winter wheat eyespot caused by fungi Oculimacula acuformis and O. yallundae     

《Crop Protection》2016

The aim of this study was to estimate the effect of fungicides on the occurrence of Oculimacula spp. on winter wheat stems using real-time polymerase chain reaction (Real-time PCR) method. The ratio of Oculimacula yallundae and Oculimacula acuformis in the population was assessed from 2009 to 2011 in the winter wheat crops after 2, 3, and 4 years of use of fungicides prochloraz, cyprodinil, prothioconazole, metrafenone, and boscalid. After 4 years of fungicide use, the highest relative reduction of DNA of both fungi, compared with the unsprayed control, was detected in the samples from cyprodinil-applied plots. Relatively less O. yallundae DNA was identified in the samples from prochloraz- and that of O. acuformis from prothioconazole-applied plots. Metrafenone and boscalid had little effect on the changes in Oculimacula population. Fungicide effect on O. acuformis and O. yallundae pathogenesis slightly differed. In Oculimacula population under the fungicide treatment, 10 days after application (BBCH 37), the ratio of O. acuformis in all treatments was reduced, but the ratio of O. yallundae was increased in prevalence compared to O. acuformis in cyprodinil and prothioconazole treatments. Later in the season (BBCH 75), the ratio of O. acuformis increased in metrafenone and O. yallundae in prochloraz treatments. The effect of fungicides used for eyespot control on winter wheat productivity was inconsistent. Prochloraz use led to a significant grain yield increase in 2010, while prothioconazole use showed a similar increase in 2009 and 2010. Cyprodinil, boscalid, and metrafenone did not have any effect on the yield in any of the experimental years. A significant increase in thousand grain weight was obtained in prochloraz, prothioconazole, and boscalid treatments.  相似文献   

党参茎基腐病镰孢菌鉴定及其对杀菌剂的敏感性研究   总被引：1，自引：0，他引：1  

漆永红  李敏权  曹素芳  蒋晶晶  李雪萍  李青青  徐美蓉  李继平 《农学学报》2021,11(2):74-78

为明确党参茎基腐病害的病原、致病性和优势病原种类及其对不同杀菌剂的敏感性,采用组织分离法进行病原菌分离,并根据其培养性状、形态学和分子生物学特征进行鉴定,同时采用平皿菌丝生长抑制法测定不同药剂的敏感性。结果表明,该病害的病原为尖孢镰孢菌(Fusarium oxysporum)、茄病镰孢菌(F. sonali)和木贼镰孢菌(F. equiseti),其中尖孢镰孢菌为优势种。室内致病性测试结果表明,3种镰孢菌均可引起党参茎基腐病,其中尖孢镰孢菌的致病性最强,显著高于其他2种菌。供试药剂对菌丝生长均有抑制作用,苯醚甲环唑对3种镰孢菌具有很强的抑制活性,同时3种镰孢菌对吡唑醚菌酯的敏感性较高。  相似文献   

Effect of Melampsora rust on the growth and development of Salix burjatica‘Korso’in Northern Ireland     

W. M. Dawson  A. R. McCracken 《Forest Pathology》1994,24(1):32-39

The impact of Melampsora rust on the growth of Salix burjatica‘Korso’was assessed. Comparisons were made between untreated plants and those where the disease had been partially controlled using fungicides. Fungicides delayed the onset of the disease and its effects on growth. Leaf loss was reduced whilst shoot growth and dry matter yields increased. The effect of secondary organisms was also reduced resulting in lower levels of shoot death in the following season.  相似文献   

杀菌剂防治胡麻白粉病药效初探   总被引：2，自引：0，他引：2  

张炜  陆俊武  曹秀霞  杨崇庆 《宁夏农林科技》2012,53(11):18+20

通过大田试验,对杀菌剂防治胡麻白粉病的药效及其对胡麻产量、经济性状的影响进行研究。结果表明:药后20 d,32%锰锌.腈菌唑WP 288 g a.i./hm2、40%福星EC 24 mL a.i./hm2对胡麻白粉病的防效分别可达50.00%和47.78%,较清水对照分别增产36.61%和41.30%。  相似文献   

6种药剂处理覆土对双孢蘑菇品质的影响   总被引：2，自引：0，他引：2  

张桂香  杨建杰  耿新军  陈小丽 《中国食用菌》2009,28(4):28-31

研究了6种药剂处理覆土后对双孢蘑菇子实体质量的影响.结果表明,各种药剂对双孢蘑菇的子实体形态和单菇重量影响不明显.疣克星稀释倍数为1 200倍、消毒剂稀释倍数为2 000倍～5 000倍、多菌灵稀释倍数为1 500倍～2 500倍、菇丰稀释倍数为2 000倍～2 400倍、甲基托布津稀释倍数为2 500倍时对双孢蘑菇增产明显;百菌清处理能降低双孢蘑菇产量.  相似文献   

菌毒清杀菌谱的研究和田间防治试验   总被引：3，自引：0，他引：3  

程廉  闫桂姝  刘柳 《西北农业学报》1994,3(3):85-89

对23种重要病原菌室内生物测定结果表明,菌毒清是一种具有广谱性的杀菌剂,可防治多种植物病害.田间药效试验证实,菌毒清对黄瓜霜霉病、番茄早疫病和苹果树腐烂病的防治效果,均优于当前使用的高效杀菌剂.  相似文献