Bacillus thuringiensis var. kurstaki (Btk) for Rose Farms in Thika, Kenya | Biological Caterpillar Management | Peak Laboratories India

Caterpillars and other susceptible lepidopteran larvae can damage rose foliage, shoots and flower buds, reducing the commercial quality of cut flowers.

Bacillus thuringiensis var. kurstaki (Btk) is a microbial biopesticide widely used in Integrated Pest Management programs targeting susceptible caterpillar larvae.

For commercial rose farms around Thika, Kenya, Btk can be incorporated into suitable biological caterpillar-management programs.

Btk for Rose Farms

Btk is most relevant when susceptible caterpillar larvae are actively feeding.

Early identification of larval populations can improve the timing of biological applications.

Good coverage of feeding surfaces is important because Btk generally needs to be ingested by susceptible larvae.

Peak Laboratories Btk

Peak Laboratories manufactures Bacillus thuringiensis var. kurstaki formulations for professional agriculture and floriculture.

Liquid — 2 × 10⁸ CFU/ml

Powder — 2 × 10⁸ cells/gram

Peak Laboratories also supplies Btk under its BRUISER range.

Application for Rose Farms

Btk is primarily suitable for foliar application where susceptible caterpillar larvae are feeding.

For Peak Laboratories powder formulation:

Foliar spray — 5 g/L water

Applications should provide thorough coverage of susceptible plant surfaces.

Final dosage, pest claims and application intervals should follow the applicable registered product label.

Btk in Rose IPM

Btk can be incorporated into an Integrated Pest Management strategy alongside crop scouting, pheromone or monitoring systems where appropriate, sanitation, removal of heavily damaged material and compatible biological-control practices.

Monitoring larval stage is important because younger susceptible larvae are generally more suitable targets for Btk-based programs.

Btk for Greenhouse Roses

Greenhouse rose growers can use regular scouting to identify caterpillar activity before severe bud or foliage damage develops.

Btk provides a microbial option that can form part of a broader biological crop-protection program.