By George Olwenya
Experts on Thursday warned that the weed was posing a threat to food security in the region, as it affects more than 540,000 acres of crops every season.
Striga, known in Nyanza as kayongo and Oluyongo in Western, affects maize, millet, sorghum and rice production leading to loses of 180,000 tonnes.
"But under heavy infestation of a farm by striga, a farmer could get zero yield," he added.
The demonstration was organised by the implementing agency in Kenya, the Organisation for Transforming Initiated Technologies, which was represented by its director Mr Emmanuel Opil and programme officer Ms Joan Mwanga.
Odhiambo said the demonstration sites spread across Nyanza and Western were being implemented as a programme to fight striga under the Integrated Striga Management in Africa focusing on Kenya and Nigeria and funded by the Bill and Melinda Gates Foundation.
The sites are in Siaya, Teso, Busia, Kisumu, Rachuonyo and Migori.