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本课题针对黑龙江省黑穗醋栗(Ribesnigrum·L)白粉病的发生危害特点,就发病症状及病原茵的形态特征、生物学特性、发生规律进行了系统的研究。明确了黑穗醋栗白粉病在我省的发病株率100%,病指40—80%;该病害对植株生长和叶绿素含量有明显抑制作用,一般造成减产10—50%;详细观察记载了病害的症状,鉴定出病原菌为子囊菌纲白粉菌目单囊白粉菌属、醋栗单丝壳菌[Sphaerothecamors—uvae(schwein)Berk·etcurt],研究了有关病原菌的生物学特性;探讨出了白粉病发生最适宜温度17—22℃,相对湿度越大越有利于病害的流行;明确了不同品种及类型间的侵染型有较大差别,不同的栽培措施株丛感病的程度也有一定差异。
In this paper, according to the occurrence characteristics of Ribesnigrum L. powdery mildew in Heilongjiang Province, the morphological characteristics, biological characteristics and occurrence regularity of the disease symptoms and pathogens were systematically studied. Clearly blackcurrant powdery mildew in the province of the incidence of plant 100%, the disease means 40-80%; the disease on plant growth and chlorophyll content significantly inhibited the general result in 10-50% reduction; detailed observation documented The pathogen was identified as Sphaerothecamors-uvae (schwein) Berk etcurt, a strain of Aspergillus spp., Which belongs to the genus Blazei, and studied the biological characteristics of the pathogenic bacteria. Powdery mildew occurred the most suitable temperature of 17-22 ℃, the greater the relative humidity is conducive to the epidemic; identified different types and types of infection are quite different types of cultivation measures of the degree of plexus susceptibility are also some differences .