DIFFERENT MODELS OF PINK BOLLWORM PECTINOPHORA GOSSYPIELLA SAUNDERS TRAP CATCHES AND BOLL INFESTATION RELATIONSHIPS UNDER DIFFERENT CONDITIONS

AL-BELTAGY, ABDAL-ALAA M. M.; HAMED, ABDAL-ALAA M.; MOAWAD, GALAL M.

doi:10.21608/ejar.1995.442901

DIFFERENT MODELS OF PINK BOLLWORM PECTINOPHORA GOSSYPIELLA SAUNDERS TRAP CATCHES AND BOLL INFESTATION RELATIONSHIPS UNDER DIFFERENT CONDITIONS

Document Type : Original Article

Authors

Plant protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt.

10.21608/ejar.1995.442901

Abstract

Pink bollworm Pectinophora gossypiella Saunders (PBW) is the most destructive cotton pest in all cotton growing areas of the world. Forecasting PBW moths population density and dynamics by using the pheromone delta sticky traps is a vital tool for directing pest control op‌erations. The correlation between PBW trap catches and PBW infestation in green bolls is of great importance in this aspect. Under nine different control tactics for PBW control pheromone and / or insecticides treatments, the correlation coefficient and regres‌sion equation models have been estimated. It was found that every con-trol tactic had its own regression equation model. It was also found that the correlation coefficient and the regression equation model differs from early, mid to late season. The overall correlation coefficient and the regression equation model was estimated. The estimated boll infestation percentages (dependent variable) under different PBW control tactics, and dates of inspections, by using the given estimated parameters, were almost very close to the actual ones.