共查询到19条相似文献,搜索用时 938 毫秒
1.
2.
《中国森林病虫》2017,(3)
2014年3月—2015年10月系统调查了甘肃太统—崆峒山国家级自然保护区松落针病的发生危害并进行药剂防治试验。结果为:经形态学鉴定,引起该地区松落针病的病原菌为斑痣盘菌科Rhystimataceae 2属4种,即针叶树散斑壳菌Lophodermium conigenum、松针散斑壳菌L.pinastri、光亮散斑壳菌L.nitens、华山松舟皮盘菌Ploioderma pini-armandi,其中松针散斑壳菌分布广泛,感染率高,针叶林感病率34.7%,苗木感病率32.6%;主要寄主有油松Pinus tabuliformis,华山松P.armandii和樟子松P.sylvestris var.mongolica;几种常用药剂防治,45%代森铵200~300倍液防治率为86%,防治效果最佳。 相似文献
3.
由丽赤壳属(Calonectria)真菌引起的桉树焦枯病是桉树世界范围内的重要病害之一。为了筛选能有效抑制丽赤壳属病原菌的杀菌剂,本研究采用6种杀菌剂(百菌清、代森锰锌、多菌灵、甲基硫菌灵、嘧菌酯、咪鲜胺)对5种桉树丽赤壳属病原菌(Ca. cerciana、Ca. crousiana、Ca. fujianensis、Ca. pauciramosa、Ca. pseudoreteaudii)通过菌丝生长法测定其室内毒力强弱。结果显示:6种杀菌剂对5种丽赤壳属病原菌均有一定的抑制作用,且差异显著。不同杀菌剂对同一丽赤壳属病原菌的抑制效果差异显著,不同丽赤壳属病原菌对同一杀菌剂的敏感性也存在差异。综合比较分析,咪鲜胺能有效发地抑制本研究中测定的丽赤壳属病原菌菌丝生长。 相似文献
4.
红豆杉属于珍稀濒危植物,在栽培过程中易受到病害的侵袭,为了筛选不同杀菌剂对红豆杉立枯病菌—茄腐皮镰孢菌的毒力作用和防治效果,在室内采用生长速率法进行了6种杀菌剂对红豆杉立枯病菌的室内毒力测定,结果表明,6种杀菌剂的毒力效果分别为:代森锰锌可湿性粉剂菌必治可湿性粉剂70%甲基硫菌灵可湿性粉剂80%代森锌可湿性粉剂50%多菌灵可湿性粉剂75%百菌清可湿性粉剂。代森锰锌对红豆杉立枯病菌的抑菌率最高,毒力作用最强,EC50值为0.32 mg·L~(-1)。 相似文献
5.
论述了平榛白粉病的发病规律,利用不同浓度的代森铵、多菌灵、甲基托布津、三唑酮和百菌清药剂对平榛白粉病进行防治试验,比较了不同种类和不同浓度的药剂对平榛白粉病的防治效果。结果表明:平榛白粉病初期发病为5月下旬至6月初,发病高峰期为6月下旬至7月下旬;代森铵、甲基托布津、多菌灵、百菌清、三唑酮等药剂对平榛白粉病的防治均有不同程度的效果,以25%三唑酮可湿性粉剂防治效果最好,可达到80%以上。 相似文献
6.
7.
8.
壶瓶枣Ziziphus jujuba Mill褐斑病为近年来山西发生的一种严重的壶瓶枣果实病害,症状表现为果项或果肩部位形成红褐色病斑,经鉴定,病原为有丝分裂孢子真菌链格孢菌Alternaria alter-nata(Fries)Keissler.采用生长速率抑制法和悬滴法分别测定了9种杀菌剂对该病菌的菌丝生长和孢子萌发的抑制作用,并测定了其中4种杀菌剂对该病菌的毒力.结果表明,代森锰锌、异菌脲、多菌灵、剑斑和施力科对病菌菌丝生长抑制作用较强,抑菌率均在90%以上;炭阻绝、代森锰锌、多菌灵、剑斑和施力科对病菌孢子萌发抑制活性比较强,抑菌率也在90%以上.毒力测定结果表明,施力科、多菌灵、剑斑和代森锰锌的有效中浓度(EC50)分别为14.45,20.83,28.47,149.93 mg/L,其中施力科的有效中浓度最低,相对抑制效果最好.4种药剂的相关系数均在0.93以上,表明药剂浓度与抑制作用呈现较高的正相关. 相似文献
9.
10.
桉树小新壳梭孢梢枯病菌室内药剂毒力测定 总被引:1,自引:0,他引:1
在室内培养条件下,采用生长速率法测定了10种常用杀菌剂对桉树小新壳梭孢枝枯病菌Neofusicoccum parvum (Penny Cook & Samuels)的抑制效果,结果表明:25%苯醚甲环唑和25%丙环唑对N.parvum抑制效果最好,EC50值分别是0.0312和0.0330 mg/L;18.7%丙环·嘧菌酯、25%咪鲜胺、50%甲基硫菌灵、50%异菌脲、50%多菌灵、40%腈菌唑和75%百菌清抑菌效果次之,EC50值分别为0.0499,0.0681,0.1462,0.1672,0.2720,0.3454和4.6199 mg/L;25%嘧菌酯抑菌效果最差,EC50值是16.1451 mg/L. 相似文献
11.
笔者通过采用13.0%多·硫烟剂、2.5%百菌清烟剂对马尾松落针病进行防治试验,结果表明:13.0%多·硫烟剂防治马尾松落针病的适宜用药量为1600~2000g/666.7m2,且对马尾松生态安全。 相似文献
12.
H. Von Pagony 《Forest Pathology》1976,6(2):71-74
Production of hysterothecia from pure cultures of Lophodermium pinastri (Schrad.) Chev. A method is described for the production of hysterothecia from pure cultures of L. pinastri. Previously sterilized needles of Finns sylvestris, after being overgrown on the culture dish are removed and put on living moss under natural conditions. In 2–2,5 months hysterothecia appear. 相似文献
13.
14.
采用最常见的5种药剂(75%百菌清、50%多菌灵、50%代森锰锌、58%瑞森霉、70%扑菌清)对油茶炭疽病进行防治的结果表明:5种药剂都有一定的防治效果,其中,以50%多菌灵和70%扑菌清处理组的防治效果最佳,但5种药剂防治效果的持续性较差,建议适时采取第3次药剂喷洒。 相似文献
15.
H. J. Von Beigl 《Forest Pathology》1977,7(4):200-219
Modification in discase-sensibility of forest plants by herbicide treatment. I. Field trials with Lophodermium pinastri. The effect of two herbicides TOP-KH (salt of 2,4,5-T) and Casoron G (Dichlobenil) on incidence of Lophodermium pinastri on Scots pine (Pinus sylvestrií L.) was investigated in field trials with potted plants. Treatment with TOP-KH led to increase in infection with higher herbicide concentrations and to higher numbers of severely infected plants in comparison with controls. Differences were greatest in spring. With Casoron G, however, smaller numbers of sevcrely infected plants were seen in spring and at the end of the growing season the damage was not much greater than in the controls. Possible reasons for changes in degree of infection are discussed as well as effects that could be expected on the epidemiology of pine needle cast. 相似文献
16.
17.
H.J. Von Beigl 《Forest Pathology》1978,8(3):174-183
Modification in disease-sensibility of forest plants by herbicide treatment. II. Laboratory studies on Lophodermium pinastri. The effect of TOP-KH (2, 4, 5-T) and Dichlobenil on the growth of Lophodermium pinastri in culture was studied in the laboratory. The effect of aqueous solutions of TOP-KH on germination of Lophodermium spores was also tested. Assessments were also made of the number of apothecia produced on herbicide-treated plants, their size and the number of spores emitted. A final discussion of results is given. 相似文献
18.
B. R. Von Stephan 《Forest Pathology》1973,3(1):6-12
Studies of the variability of Lophodermium pinastri. I. Cultural Variants. Lophodermium pinastri is a variable fungus species. From its behaviour in artificial culture 3 constant, morphological main types are observed. These are described in detail. Observations on sectoring found and on reaction types between various fungus isolates are given. 相似文献