Abstract Microalgae and cyanobacteria could play an important role in crop protection, since they produce bioactive substances that promote plant growth and/or trigger the resistance mechanisms. The present study focuses on control of bacterial canker caused by Clavibacter michiganensis subsp. tomato plants using sonicated extracts from microalgae genera Leptolyngbya , Nostoc Chlorella Scenedes...

Bacterial canker caused by the Gram-positive actinobacterium Clavibacter michiganensis is one of most serious bacterial diseases tomatoes, responsible for 10–100% yield losses worldwide. The pathogen can systemically colonize tomato vascular bundles, leading to wilting, cankers, bird’s eye lesions, and plant death. Bactericidal agents are insufficient managing this disease, because rapidly migr...

..............................................................................................53 Introduction..........................................................................................54 Methods and Materials..............................................................................57 Results.........................................................................................