@article{fdi:010089570,
  title = {{N}atural regulation of {H}elicoverpa armigera larvae by hymenopteran parasitoids in northern {C}ameroon : is there scope for application of conservation biological control in cotton agroecosystems ?},
  author = {{S}ilvie, {P}ierre and {G}oz{\'e}, {E}. and {D}elvare, {G}. and {D}jague, {T}. {L}. and {D}ok{\'e}, {N}. {S}. and {P}rudent, {P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he conservation biological control ({CBC}) concept has been explored through research conducted in northern {C}ameroon on larval parasitism of {H}elicoverpa armigera, a major cotton pest, on different host plants year round, from early {S}eptember 2008 to late {D}ecember 2014. {A} total of 47,152 caterpillars were reared over the 6-year period. {T}hey were found regularly present on crops such as cotton and okra and on wild plants, including {C}orynandra viscosa and {H}yptis spp. {T}he overall percentages of nematode- and disease-infected caterpillars were very low (1.05% and 2.92%, respectively). {D}iptera species accounted for less than 0.1% of the parasitoids that had emerged from caterpillars. {T}otal hymenopteran parasitism was 10.5%, and varied markedly depending on the host plants. {N}ine {H}ymenoptera species were identified, with {M}eteorus laphygmarum being the dominant one (almost 80% of all 2698 adult parasitoids obtained after rearing), followed by {S}choenlandella variegata (16.42%) and {C}harops spinitarsis (<2%). {O}ut of this total, 35%, 28% and 25% of the adults were obtained respectively on {C}. vicosa, cotton and {H}yptis spp., i.e. < 5% on all other host plants. {T}he analysis conducted on 237 collections showed that, after adjusting for year and month effects, a highly significant difference was found between the parasitism rates observed on the different host plant species. {T}he plants most suitable for {H}. armigera parasitism were {A}cantospermum hispidum, {C}. viscosa and {H}yptis spp. {T}he proportion of {M}. laphygmarum among emerged hymenoptera was highest on {C}. viscosa, medium on cotton and {H}yptis spp. and lowest on {L}. esculentum. {F}uture studies that could be carried out are outlined in the discussion with the aim of facilitating the transfer of parasitoids from caterpillars present on one plant species to those infesting cotton crops.},
  keywords = {{H}abitat management ; {C}otton bollworm ; {A}frica ; {N}atural regulation ; {E}cosystem service ; {CAMEROUN}},
  booktitle = {},
  journal = {{C}rop {P}rotection},
  volume = {178},
  numero = {},
  pages = {106583 [13 p.]},
  ISSN = {0261-2194},
  year = {2024},
  DOI = {10.1016/j.cropro.2024.106583},
  URL = {https://www.documentation.ird.fr/hor/fdi:010089570},
}