银杏早期黄化病初步研究

文章对银杏早期黄化病发病症状、病原因子、发生发展规律和防治进行了初步研究.认为病原为非生物侵染因子引起.6月上旬为始发期,经复回归关系显著性检验,温、湿度对病斑的线性回归关系不显著,病斑扩展过程呈逻辑斯蒂曲线,与时间呈正比.在6月份前用多效锌肥,和硼、锰、锌等微量元素混合液(1:500)泼浇根基附近地面,能有效地控制其病害的发展.

A preliminary research on the early yellows of maindenhair tree

A Preliminary Research on the Early Yellow of Maidenhair tree/ Zhang Zhu-liang*//Journal of Jiangsu Forestry Science & Technology -1990, 17(2).-41~44. This paper had conducted the primary study on the early yellow of maidenhair tree (Ginkho biloba L.) ' s symptom of disease, factor of pathogen , law of emergence and development, and control test. The results indicated that the disease was caused by abiotic agent.The development of area of leaf spot on maidenhair tree hadn't apparent correlation with temperature and moisture from the first ten days of June to September which was tested by multiple regression analysis. The relationship of the development of spot disease on maidenhair tree and duration of the ten days of the month showed the curve of logistic equation.By splashing 10% multiple effective zinc fertilizar and mixture(1:500) of five microelements (500 ppm of boron, 500 ppm of manganese, and 50 ppm of zrnc etc.) to the baise of maidenhair tree before June, the development of yellow can get good effect of the control. Authers'address: Forestry Research Institute of Jiangsu Province, Dong Shan qiao, Zhong hua men wei, Nanjing, Jiangsu, 211153, PRC