Bacterial leaf and fruit spot disease in field-grown tomatoes: are there alternatives for green copper?

摘要

Greenhouse and field studies were carried out in Germany with tomatoes (cv. Vanessa) artificially infected with Pseudomonas syringae pv. tomato. Plants were treated with Myco-Sin (plant extract + aluminium oxide), Bion (benzothiadiazole), BlightBan(Pseudomonas fluorescens), Menno Florades (benzoic acid), and copper. Greenhouse plants were treated on 30 September 1997 (2 days before infection), while field tomatoes were sprayed 5 times during May-June 1998. Results showed that copper treatments were most effective, while Myco-Sin and low rates of Bion were promising.