ANALYZING THE EFFECTIVENESS OF DIFFERENT HERBICIDES COMBINATIONS AND DOSAGES FOR PARTHENIUM WEED MANAGEMENT IN DISTRICT CHARSADDA

Abstract

This research investigates the impact of different herbicide treatments on the amount of chlorophyll and the duration of symptoms in Parthenium weed. Various herbicides, including Bromoxynil, Atrazine, and Glyphosate, were tested at different time intervals (24h, 48h, and 72h). The results showed that Glyphosate (alone) had the highest level of relatively stable chlorophyll retention, although it decreased moderately over time. In contrast, Bromoxynil (alone) and Bromoxynil + Atrazine (full dose) led to rapid chlorophyll loss and symptom development within the first 18 hours. Atrazine + Glyphosate + Bromoxynil (full dose) provided effective weed control without significant reduction in chlorophyll content, resulting in a balanced effect. The researcher concludes that Bromoxynil accelerates symptom development and chlorophyll loss, while Glyphosate and Atrazine offer a more controlled approach by inhibiting weed growth and maintaining chlorophyll levels, with a combination of the two yielding even better results. It is recommended to use powerful Bromoxynil-based treatments for faster weed control, but for longer-lasting effects with minimal impact on plant vitality, a combination of Glyphosate and Atrazine would be more suitable.