In order to contribute to the development of an integrated management
strategy for cotton aphids ( Aphis gossypii ), tests of the effects of
mineral manure and predators on the variation of its population levels
were studied. Data collection was carried out in a three-day follow-up
on cotton plants ( Gossypium hirsutum L.) grown in experimental plots
at the Station d\u2019Exp\ue9rimentation Agronomique de
l\u2019Universit\ue9 de Lom\ue9 in Togo. The results from
population fluctuation of Aphis gossypii revealed two peaks of swarming
during the cotton plant cycle. The first peak of the small outbreak
period on the 46th day after sowing (DAS) was less important
numerically. The second peak of the great outbreak period on the 86th
DAS was numerically larger and caused considerable damage to cotton
plants. Infestations and levels of population variation during the
cotton growing cycle were highly dependent on the dose of applied
mineral fertilisers. The presence and development of predators
positively correlated with the level of plant infestation by the
aphids, without having a noticeable regulatory effect on their
population.Dans la perspective de contribuer \ue0 l\u2019\ue9laboration
d\u2019une strat\ue9gie de gestion int\ue9gr\ue9e du puceron de
cotonnier Aphis gossypii , les tests de l\u2019effet de la fumure
min\ue9rale et des pr\ue9dateurs sur la variation des niveaux de
population de ce dernier ont \ue9t\ue9 \ue9tudi\ue9s. La
collecte des donn\ue9es a \ue9t\ue9 r\ue9alis\ue9e par un
suivi \ue0 chaque trois jour sur plants de cotonnier ( Gossypium
hirsutum L.) install\ue9 en parcelles exp\ue9rimentales \ue0 la
Station d\u2019 Exp\ue9rimentation Agronomique de
l\u2019Universit\ue9 de Lom\ue9. Les r\ue9sultats de la
fluctuation de population d\u2019Aphis gossypii ont
r\ue9v\ue9l\ue9 deux pics de pullulation durant le cycle du
cotonnier. Le premier pic de la petite p\ue9riode de pullulation au
46\ue8me jour apr\ue8s semis (jas) est moins important
num\ue9riquement. Le second pic de la grande p\ue9riode de
pullulation au 86\ue8me jas est num\ue9riquement plus important et
cause des d\ue9g\ue2ts consid\ue9rables aux cotonniers. Les
infestations et les niveaux de variation de populations au cours du
cycle de la culture cotonni\ue8re sont tr\ue8s d\ue9pendants de
la dose de fumure min\ue9rale appliqu\ue9e La pr\ue9sence et le
d\ue9veloppement des pr\ue9dateurs ont corr\ue9l\ue9
positivement avec le niveau d\u2019infestation des plants par le
puceron sans avoir un effet r\ue9gulateur remarquable de la
population de ce dernier