B-RUS and EXTRASOL
B-RUS and EXTRASOL are the powder and liquid formulations of the same two PGPB Bacillus subtilis isolates respectively. These two isolates work synergistically and produce two plant promoting substances and three biocontrol agencies.
Both can be applied directly onto seeds before planting and/or as foliar sprays after emergence at a plant height of 10 to 15 cm. For best results seed treatment and at least one foliar application is recommended. These two products act in the same way. After germination, the bacteria colonize the developing root system.
In the first instance, root and root hair development is stimulated. This results in better nutrient and water absorption.
In the second instance, the bacteria invade the roots and become systemic. This stimulates the plant’s natural immune response to pathogens and makes the plants more tolerant to drought stress.
In the third instance, the better root development makes the plant more resistant to lodging due to high winds.
Since Bacillus Subtilis form endospores which are heat resistant and tolerant to desiccation and several chemicals, B-RUS can be applied to seeds up to one week before planting.