@article{fdi:010053126,
  title = {{P}arasitism of lepidopterous stem borers in cultivated and natural habitats},
  author = {{M}ailafiya, {D}. {M}. and {L}e {R}ü, {B}runo and {K}airu, {E}. {W}. and {D}upas, {S}t{\'e}phane and {C}alatayud, {P}aul-{A}ndr{\'e}},
  editor = {},
  language = {{ENG}},
  abstract = {{P}lant infestation, stem borer density, parasitism, and parasitoid abundance were assessed during two years in two host plants, {Z}ea mays ({L}.) ({C}yperales: {P}oaceae) and {S}orghum bicolor ({L}.) ({C}yperales: {P}oaceae), in cultivated habitats. {T}he four major host plants ({C}yperus spp., {P}anicum spp., {P}ennisetum spp., and {S}orghum spp.) found in natural habitats were also assessed, and both the cultivated and natural habitat species occurred in four agroecological zones in {K}enya. {A}cross habitats, plant infestation (23.2%), stem borer density (2.2 per plant), and larval parasitism (15.0%) were highest in maize in cultivated habitats. {P}upal parasitism was not higher than 4.7% in both habitats, and did not vary with locality during each season or with host plant between each season. {C}otesia sesamiae ({C}ameron) and {C}. flavipes {C}ameron ({H}ymenoptera: {B}raconidae) were the key parasitoids in cultivated habitats (both species accounted for 76.4% of parasitized stem borers in cereal crops), but not in natural habitats (the two {C}otesia species accounted for 14.5% of parasitized stem borers in wild host plants). {N}o single parasitoid species exerted high parasitism rates on stem borer populations in wild host plants. {L}ow stem borer densities across seasons in natural habitats indicate that cereal stem borer pests do not necessarily survive the non-cropping season feeding actively in wild host plants. {A}lthough natural habitats provided refuges for some parasitoid species, stem borer parasitism was generally low in wild host plants. {O}verall, because parasitoids contribute little in reducing cereal stem borer pest populations in cultivated habitats, there is need to further enhance their effectiveness in the field to regulate these pests.},
  keywords = {agroecological zones ; cereals ; habitat types ; seasons ; wild host plants},
  booktitle = {},
  journal = {{J}ournal of {I}nsect {S}cience},
  volume = {11},
  numero = {},
  pages = {15},
  ISSN = {1536-2442},
  year = {2011},
  DOI = { 10.1673/031.011.0115},
  URL = {https://www.documentation.ird.fr/hor/fdi:010053126},
}