Incidence of the African Rice Gall Midge AfRGM, Orseolia oryzivora H. & G. in Relation with Period of Rice Transplanting in the Kou Valley, Burkina FasoReport as inadecuate




Incidence of the African Rice Gall Midge AfRGM, Orseolia oryzivora H. & G. in Relation with Period of Rice Transplanting in the Kou Valley, Burkina Faso - Download this document for free, or read online. Document in PDF available to download.

The African Rice Gall Midge, Orseolia oryzivora H. & G., is an important insect pest recorded in 20 countries in Sub-Sahara Africa. In Burkina Faso, the insect pest particularly prevails in Western and South-Western of the country where both biotic and abiotic conditions favor its development. The insect pest can damage up to 60% of rice tillers in Western Burkina Faso. A study was conducted during the 2011 wet season in the Kou Valley, located 25 km North-West of Bobo-Dioulas- so, Western Burkina Faso. Its objective was to evaluate the damage of this insect pest in farmers’ fields in relation with rice transplanting periods. The Kou Valley rice scheme, 1200 ha, was divided into two zones within which 48 farmers’ fields were randomly selected in relation with rice transplanting periods: P1: 1st period; P2: 2nd period and P3: 3rd period; that is 16 fields per period. Both agronomic and entomological evaluations were performed each week starting from the 21th day after transplanting DAT up to 84 DAT. Results showed that the highest average damage level 16% of galls was recorded in the 3rd transplanting period. The highest larval and pupal parasitism was recorded in P3 at 84 DAT. Pupal parasitism due to Aprostocetus procerae Risbec was higher than larval parasitism due to Platygaster diplosisae Risbec. Lastly, the lowest yield 4.78 t-ha was recorded in P3. These results can be used in the implementation of an integrated pest management strategy for this insect pest in the Kou Valley.

KEYWORDS

Orseolia oryzivora, Transplanting Period, Gall, Parasitism, Aprostocetus procerae, Platygaster diplosisae, Burkina Faso

Cite this paper

Sama, K. , Nacro, S. , Thiaw, C. and Dakouo, D. 2016 Incidence of the African Rice Gall Midge AfRGM, Orseolia oryzivora H. & G. in Relation with Period of Rice Transplanting in the Kou Valley, Burkina Faso. Advances in Entomology, 4, 97-103. doi: 10.4236-ae.2016.42011.





Author: Karim Sama1, Souleymane Nacro2*, Cheikh Thiaw3, Dona Dakouo2

Source: http://www.scirp.org/



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