Chemical weed control in cotton
1995
Halimie, M.A. | Ahmad, M.R. | Sheikh, M.A. (Plant Protection Inst., AARI, Faisalabad (Pakistan))
An experiment aimed at finding the best treatment for controlling the challenging weeds of cotton, viz; Cynodon dactylon and Dactyloctenium aegyptium was conducted at Faisalabad. Agil 100 EC @ 750 ml ha-1 was applied 35 days after crop sowing and its efficacy was compared with the standard Stomp 330 E @ 3750 ml ha-1 sprayed as pre-emergence. Weed mortality due to herbicides recorded 30 days after application significantly differed from the actual weed population in untreated plots. Agil 100 EC gave better weed control with minimum population of 6.66 and 8.33 weeds m-2 during 1992 and 1993, respectively. While Stomp 330 E performed poor with 31.66 and 32.33 weeds m-2 which was significantly higher weed infestation than that in Agil 100 EC. Actual weed density evaluated in check plots was 66.33 and 70.00 m-2 which significantly differed from herbicidal treatments. Effect of weed control was reflected accordingly on the seed cotton yields. It was higher (3218 and 1933 kg ha-1) in case of Agil 100 EC followed by Stomp 330 E (2616 and 1326 kg ha-1). Both these herbicides were, however, safe for use in cotton and caused no phytotoxicity or injury to the crop till harvest.
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