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枇杷灰斑病(Pestalozzia funerea Desm.)是上海郊区枇杷的主要叶部病害。此病常导致枇杷叶片早期脱落,削弱树势,影响新梢抽生。为此,我们对枇杷灰斑病菌的某些生物学特性及室内药效测定作了初步研究,现简报如下: 一、枇杷灰斑病菌培养性状: 1.在PDA培养基上生长性状:病菌在PDA培养基上生长良好。菌丝先为白色,渐转为黄白色,最后为土黄色。气生菌丝为白色,较疏松。培养基底色为黄褐色。在24℃恒温培养下,一般经15天左右长出分生孢子盘,并产生分生孢子。
Pestalozzia funerea Desm. Is the major leaf disease of loquat in Shanghai suburbs. This disease often leads to loquat leaves early fall off, weaken the tree vigor, affecting the shoots pumping. To this end, we have some preliminary studies on the biological characteristics and indoor efficacy of Cercospora sojae, are summarized as follows: First, the loquat gray spot culture traits: 1. Growth traits in PDA medium: bacteria in PDA medium grew well. Mycelium is white first, gradually turned yellow and white, finally khaki. Aerobic mycelium is white, more loose. Medium color is tan. Under constant temperature incubation at 24 ° C, conidiophores are generally grown in about 15 days and produce conidia.