n African Entomology - Biology and development of (Diptera: Tachinidae) on different species and populations of maize stemborers in Zimbabwe and an assessment of its suitability for redistribution in Africa




The tachinid larval parasitoid (Curran) has a wide distribution in eastern, southern and West Africa where it attacks several species of cereal stemborers. Its development on Fuller (four populations), (Swinhoe) and Hampson was evaluated in Zimbabwe in the laboratory. The parasitoid's larviposition patterns and ways to induce its early emergence from diapausing host larvae inside which it overwinters were also studied. Irrespective of the inoculation method used, the four populations were equally suitable for parasitoid development. was a partially suitable host while was completely unsuitable. Mated female parasitoids commenced larviposition at eight days after mating, with a peak being attained on day 15. Placing field-collected diapausing larvae in fresh maize stems or in moistened dry stems could bring forward the emergence of from diapausing hosts. The implications of the current findings on the suitability of as a redistribution candidate in Africa are discussed.


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