Collection of test plant material.
The bark and stem of fresh mature Grevillea robusta were
collected from Luanda Sub-county of Vihiga County. The stem was dried at
60°C in a shade for 72 h. The resulting dried sample
was ground using a mill (Jehmlich, Germany) and placed in bags and
transported to the National museums of Kenya for further experiments.
The same procedure was repeated for Eucalyptus Sugarcane, Maize, Bamboo,
and Cypress.