Display name Samuel Mensah First name Samuel Last name Mensah email@example.com Role Researcher Country Ghana Organisation Plant Protection And Regulatory Services Directorate (Ministry of Food and Agrulture)/ Collaboration with CABI WEST AFRICA Area of Research Biology, Monitoring, Surveillance and Scouting; Biological Control; Cultural Control and Agro-ecology Management; Environmentally Safe Pesticides and Pesticide Risk Management; Socio-economics and Impact Assessment Describe your research
Fall armyworm biological control. Fall armyworm localy present parasitoids and predators scouting and I dentification in the West Africa sub region. Parasitoids and predator rearing in laboratory for release in maize fields. Evidence of feeding reduction in fall armyworm after being parasitize by Coccygidium luteum. Currently working on fall armyworm Area-wide Management in Ghana under the CABI Action on Invasives program. Interaction between two larval parasitoids in the presence of their host, Fall armyworm. Testing the efficacy of T. remus on Fall armyworm with the CABI Action on Invasives team.
ORCID iD Google Scholar Link Member since November 18, 2020 Topics posted 13 Replies 15
Hymenoptera identification keys
April 1, 2021
CABI BioProtection Portal
January 17, 2021
Spodoptera frugiperda and other Spodoptera species suspected to be S. littoralis have been observed in maize farms in Ghana. What is the implication of the coexistence and infestation of these Spodoptera species to FAW management and crop protection. How does this affect Natural enemies population dynamics and effectiveness?
December 26, 2020
Thanks for the information. In Ghana west Africa, during the scouting and identification of natural enemies (Parasitoid Complex Ghana and Benin), parasitoids were more abundant and diverse in the Eastern Region in South-east Ghana , followed by Bono region in the middle belt of Ghana. This can be attributed to diversity of crops and ornamental plants in these regions. The major crops grown in the Eastern Region are mangoes (orchards), which provides parasitoids with nectar and also maize. Most of the forest cover in the Bono region is almost intact. Most tropical crops do well in these regions which implies the diversity of pests and their respective natural enemies. It may be very interesting to assess the diversity and abundance of crops and natural enemies during the rainy and dry seasons, giving a vivid description of the vegetative stage of the crop (i.e. flowing, vegetative, fruiting etc.). Planting more of such crops or plants may help conserve natural enemies. .
December 24, 2020
The augmentative releases of T. remus and T. chilonis can effectively control FAW damage in Africa. After the collection and identification of parasitoids in West Africa (Parasitoid complex of FAW Ghana and Benin), a follow up research is ongoing in Ghana on the effectiveness of T. remus in FAW control by the CABI Action on invasive team in collaboration with Plant Protection and Regulatory Service Directorate, Ghana. T. remus will prove a good and effective bio control candidate because it generally averages between 30 to 50% FAW egg parasitism (Liao et. al, 2019) and can reduces the emergence of FAW larva which damages plants unlike the egg-larval and larval parasitoid which will still permit FAW larvae emergence and some level of feeding on plant, though damage caused is lower as compared to the un-parasitized FAW larvae (https://www.researchgate.net/publication/337326103_Evidence_of_Leaf_Consumption_Rate_Decrease_in_Fall_Armyworm_Spodoptera_frugiperda_Larvae_Parasitized_by_Coccygidium_luteum ). AS it stands, understanding the bioecological interactions of parasitoids and their environment play very important role in the establishment of a biological pest control agent. Factors such as competition between parasitoids, and the use of non bio-rational pesticides may affect the establishment and effectiveness of the parasitoid. It is therefore prudent to have a holistic approach in understanding the bio -ecology and interactions of the said parasitoids in addition to the use of bio rational pesticides to yield the desired effectiveness in controlling the FAW.
December 17, 2020
How can FAW parasitoids survey and identification be done to reflect the true parasitoid diversity and population estimates of a given geographical area, as different parasitoid species have specific or a range of FAW larval instar preference?
December 13, 2020
Thanks for the question. In Ghana, West Africa many farmers are practicing early planting which enhance maize plant growth and resistance to FAW attack in late plant stages. As a result of an Area-wide management of FAW program Farmer field school introduced by CABI (Action on Invasives) some farmers now form associations and plant in groups simultaneously, where control is also done at the same time to prevent the FAW pest from invading maize farms nearby which would later reinfest already treated fields. Lastly farmers now have been enlightened on the importance of natural enemies of FAW and are committed to promoting agro ecological friendly farming. Most farmers are shifting from the use of environmentally toxic pesticides to Biorational pesticides.
December 11, 2020
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