Search. Read. Cite.

Easy to search. Easy to read. Easy to cite with credible sources.

Journal of Entomology

Year: 2009  |  Volume: 6  |  Issue: 1  |  Page No.: 49 - 55

Cotton Production in the Presence of Pectinophora gossypiella (Saunders) in Central Greece

D.G. Stavridis, P.N. Deligeorgidis, A. Gliatis, C. Giatropoulos, E. Mola, C. Fotiadou and C.G. Ipsilandis


The aim of the present research was to study fluctuations of populations of P. gossypiella in various areas in the Prefecture of Larissa. Data were analyzed to found the relation between population density of the insect and cotton production and additionally, to explore year and local (area) conditions as factors affecting damage levels. Correlations on data between years (across all communities) revealed that, when cotton production was high then the number of adult male insects of P. gossypiella captured in pheromone traps was also high (r = +0.93). Our data indicate that, when the environmental conditions of specific years favored cotton production, then the population of P. gossypiella was high due to the availability of food (more flowers and bolls), in a kind of synchronization. In parallel, the presence of increased numbers of useful insects that predate cotton enemies may result in lower damages on cotton production. In years 2002 and 2003, the presence of the insect may contribute in lower cotton production in the areas where population of adult males trapped was high. The mean cotton production was generally low in the areas where population of P. gossypiella was high. In this case, although statistically not significant, the tension was negative (r = -0.37). Local conditions within each area have been proved important and these results were completely different compared to data concerning years. The specific conditions within each area determine the balance between the insect population and level of damage on cotton production. There were areas where the insect showed increased populations resulting in low cotton production. These areas may need special treatment with insecticides or other techniques in order to decrease insect populations.

Cited References Fulltext