Native Bacillus subtilis Strains Efficiently Control Lupin Anthracnose Both under Greenhouse and in Field Conditions

Colletotrichum acutatum is the cause of lupin anthracnose in Andean zone. The pathogen affects crop throughout its entire production cycle, causing losses up to 100%. In previous studies, native strains B. subtilis (CtpxS1-1; CtpxS2-1 and CtpxZ3) from province Cotopaxi reduced infections seed seedlings. This study evaluated potential biological control these by using two susceptible cultivars under greenhouse conditions field. Plants I-451 Güaranguito I-450 Andino were treated with active biomass each strain. Pre-inoculated plants that received a bacterial concentration 1 × 109 colony-forming units per milliliter (CFU/ml) showed reduction ten times stem lesion diameter when compared artificially infected alone evaluations. Sequential applications antagonists every two-week allow for quantifying their biocontrol efficiency field conditions. A significant (P<0.05) was found area disease progression curve (AUDPC) comparing treatments naturally anthracnose, both cultivars, along 2015 2019 growing seasons. Analysis population dynamics phyllosphere survived over 7.0 LOG CFU/g on leaf surface four fact associated protective effect vegetative, flowering, pod-filling phenological stages. Results this efficiently anthracnose.