沤肥浸渍液对3种黄瓜病害的防治作用

从１９９２ 年开始连续８ 年研究马、牛和猪厩肥沤制并浸泡提取物对黄瓜病害的防治作用．盆栽试验表明，沤肥浸渍液对黄瓜霜霉病、黄瓜枯萎病、黄瓜白粉病具有良好的防治效果，对黄瓜霜霉病的防治效果可达４６ ．５ ％６７ ．３ ％ ，对黄瓜枯萎病的防治效果可达７２ ．１ ％９２ ．５ ％ ，对黄瓜白粉病的防治效果可达７２ ．３ ％７９ ．７ ％ ．对沤肥浸渍液的防病机理的研究表明，微生物代谢产物对病原菌孢子的抑制作用、沤肥中微生物对病原菌的拮抗作用和沤肥诱导的生理生化和组织形态方面的抗病性起着重要的作用

USING COMPOST EXTRACTS TO CONTROL 3 CUCUMBER DISEASES

Compost extracts made from livestock manure have shown certain prophylactic effects on cucumber wilt ( Fusarium oxysporum f.sp. cucumerinum ), cucumber powdery mildew Sphaerotheca fuliginea (Schlecht) Poll] and cucumber downy mildew Pseudoperonospora cubensis (Berk. et Curt.) Rost]. The relative efficacy of the compost extracts made from horse, cow and pig manure was 72.1 92.5% to cucumber wilt, 72.3 79.7 % to cucumber powdery mildew and 46.5 67.3% to cucumber downy mildew in pot tests, respectively. The Effects of the compost extracts on cucumber diseases could be a complex of biotic and abiotic factors. These factors acted in various degrees under different conditions of the combination of pathogens, compost extracts with different resources and hosts. The possible mechanisms concerned were also studied in this paper.