Investigation and Prevention of Leaf Spot in Radix Pseudoxtellariae in Southeast State of Guizhou Province

[ Objective] The paper was to isolate the pathogen of leaf spot in Radix pseudoxtellariae, and to select the best fungicide with good antibacterial effectagainst the disease. [ Method] The pathogen was isolated from the diseased leaves, and the antibacterial activities of four fungicides including carbendazim, chlorothalonil, thiophanate-methyl and mancozeb against the pathogen were measured through mycelial growth method. [ Result ] The microscopic examination resultsshowed that the main pathogens of leaf spot in R. pseudoxtellariae were Phyllosticta commonsii and Alternaria sp.. Antibacterial results showed that four fungicidesall had apparent inhibition effect against leaf spot in R. pseztdoxtellariae, of which carbendazim had the best effect with the inhibition rate of 76.6% ; followed bythiophanate-methyl with the inhibition rate of 72.3% ; the third was mancozeb with the inhibition rate of 68.7%, and the inhibition rate of chlorothalonil was the

一种恶意代码变种检测的有效方法

为了改变基于特征码病毒查杀存在的滞后性,以及对于恶意代码变种的无效性,提出了一种基于支持向量机和模糊推理技术的恶意代码及其变种的检测方法。基于Radux原型系统,通过使用多分类机,将恶意程序进一步细分为病毒、蠕虫和木马程序,然后进行恶意代码判定的模糊推理,使得未知病毒的检测概率进一步提升,对于已有恶意程序的检测率高达99.03%,对于恶意程序变种的检测率达到93.38%。