Ajowan caraway (Trachyspermum ammi) is burnt in four or five places in the farm because the smoke drives away grasshoppers.
Crop: Pearl Millet
Crop Family: Poaceae
Crop Scientific Name: (Pennisetum typhoides)
Crop Vernacular Name: Bajra, Bajri, Bajro
Formulation: The smoke of Ajowan caraway (Trachyspermum ammi)
Ingredients: Smoke of carom (Trachyspermum ammi)
"In both economic and ecological terms, a classical biological control agent that becomes established and exerts a controlling influence on a pest over an indefinite time period is the ideal control agent."
https://www.annualreviews.org/doi/full/10.1146/annurev.ento.46.1.667
"Farmer participatory development of a control strategy for the Variegated grasshopper with a biopesticide in the northern Mono, Benin."
https://www.researchgate.net/profile/Hugo_De_Groote/publication/267770159_Farmer_participatory_development_of_a_control_strategy_for_the_Variegated_grasshopper_with_a_biopesticide_in_the_northern_Mono_Benin/links/551b9f740cf2bb754078d66b.pdf
"Pest management practices used by the farmers are cultural and chemical control methods."
http://agro.icm.edu.pl/agro/element/bwmeta1.element.agro-34fc1775-6448-4711-a60f-9c42ddd1d760