title: Spatio-Temporal Distribution of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) and Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) in a Cotton Production Area.
abstract: Helicoverpa armigera (Hübner) and Pectinophora gossypiella (Saunders) are major pests of cotton in Greece and elsewhere. Analysing male captures in pheromone traps over two seasons, in two cotton producing sites in central Greece, the spatial and temporal variation in population dynamics were examined. In 2007, captures of male H. armigera increased in late July and maintained at high levels for 1 month and declined at the end of August. For P. gossypiella, male captures remained at low levels during summer, increased late in August, peaked at mid of September and declined toward the end of the season. In 2008, trap captures of both species increased sharply by the end of June and remained at relatively high levels until August and September for P. gossypiella and H. armigera, respectively. Spatial analysis produced a spatial trend map over space, a temporal stability map over time and a spatial and temporal trend map for both species, which could lead in separating the field into management zones, and direct control to areas that exhibit high densities of the pest population and are stable over time.
authors.affiliation: Dept of Entomology, Benaki Phytopathological Institute, Kifisia, Greece.
authors.forename: P
authors.initials: P
authors.lastname: Milonas
authors.affiliation: Lab of Entomology and Agricultural Zoology, Univ of Thessaly, N. Ionia, Volos, Greece.
authors.forename: C
authors.initials: C
authors.lastname: Gogou
authors.affiliation: Lab of Entomology and Agricultural Zoology, Univ of Thessaly, N. Ionia, Volos, Greece.
authors.forename: A
authors.initials: A
authors.lastname: Papadopoulou
authors.affiliation: Lab of Farm Mechanization, Univ of Thessaly, N. Ionia, Greece.
authors.forename: S
authors.initials: S
authors.lastname: Fountas
authors.affiliation: Lab of Farm Mechanization, Univ of Thessaly, N. Ionia, Greece.
authors.forename: V
authors.initials: V
authors.lastname: Liakos
authors.affiliation: Lab of Entomology and Agricultural Zoology, Univ of Thessaly, N. Ionia, Volos, Greece. nikopap@uth.gr.
authors.forename: N T
authors.initials: NT
authors.lastname: Papadopoulos
mesh_terms: D063147:Animal Distribution; D000818:Animals; D003368:Gossypium; D007915:Lepidoptera; D008297:Male; D009036:Moths; D010675:Pheromones; D011157:Population Dynamics; D012621:Seasons
chemical_list: D010675:Pheromones
keywords: Cotton pests; dispersion; population dynamics; spatial distribution