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4.2 Powders from lignified plant parts
Product or Method |
Application |
Mode of Action |
Effects on Target Organism |
Remarks and particular Recommendation |
Region |
|
| Pests | Efficiency | |||||
| a) Ponder of the bark of African Mahogany (Khaya senegalensis). | The dried and powdered bark is mixed with the produce (50 to 100 g per kg). | Unknowns, thought to have insecticide effects. | Bruchids on grain legumes (particularly against Bruchus maculates on Vigna unguiculata). | Medium to good protection for up to 3 months storage. | Central Africa. | |
| b) Dried rhizomes of (Acorus calamus), preferable as a powder, but also whole or as pieces. | The powder is mixed with the produce at 0,1 to % of the produce weight. | Certain ingredients of the essential oils have an insecticidal effect,inhibit development and feeding activities, repulse and sterilise pests | Bruchids on grain legumes, pests of cereals (coleoptera and moths like Sitophilus oryzae, Trogoderma granarium , Corcyra cephalonica) primarily on rice and wheat. Not as effective against Tribolium spp. | Very good results. Long term effect greater than 6 months. | Acorus has long been known as a medical plant. Long term contact with high Concentrations could be dangerous to humans. The powder can be stored up to 2 months without loss of efficacy. | In all regions of Africa where Acorus is found. |