Efficacy tests on fungicides of Alternaria tenuissima in the laboratory
2005
Zhang Jingze,Fang Yurong,Zhang Haisong
Chinese. 通过供试的18种药剂对铁皮石斛黑斑病菌体外抑制作用测试结果表明，除克菌特外，所有药剂对其孢子萌发都有显著的抑制作用，其中代森锰锌、易保、代森锌和炭疽福美可完全抑制孢子萌发，霉克特、扑海英、使百克、新太生、甲基托布津和世高对孢子萌发有较强烈的抑制作用。与对照比较，克菌特促进孢子萌发率高于对照_23.34%，_克菌特和庄园乐都能促进芽管生长。18种药剂对石斛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，其中使百克和世高对菌丝体抑制效果最好，抑菌率都达91.28%，其次是施佳乐、福星和扑海英.
Show more [+] Less [-]English. Eighteen fungicides were tested in vitro for efficacy against the black spot disease of Dendrobium candidium._Tests on conidial germination showed that all fungicides except bitertannol were effective, while mancozeb、mancozeb-famoxadone、zineb and thiram-ziram were the most effective inhibitors which completely inhibited conidial germination, followed by dimethomorph_macozeb、iprodone、prochloraz、xintaisheng、thiophanatemethyl and difenoconazoie. However, bitertannol promoted the percentage of conidial germination by 23.34% more than control, whereas both of them and zhuangleyuan (mixed amino acids-Cu-Zn-Mn-Mg) promoted mycelial growth.The tests on mycelial inhibition demonstrated that all eighteen fungicides could significantly inhibit mycelial growth, while prochloraz and difenoconazoie proved to be the most effective fungicides, with their inhibitory rates up to 91.28%，followed by primethanil、flusilazoie and iprodone.The results revealed that the efficacy of different fungicides on _A .tenussima_ at different stages is different in the laboratory.
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