Abstract
The aim of integrated weed management (IWM) is to use of a combination of different practices to maintain weeddensities at manageable levels. A field experiment was conducted at Agricultural College, Tehran of University, inKaraj city 2005-2006 by planting wheat, to investigate the response of planting methods and tank mixed herbicides. Theexperiment was laid out using a split plot arrangement, in randomized complete block design with three replications.Methods of planting were assigned to the main plots; while tank mixed herbicdes were kept in the sub-plots. The subplotsize measured 4.5 × 4.5 m2. Row to row distance was kept at 30 cm. Data were recorded on weed density m-2, plantheight (cm), spike length (cm), Number of spikes m-2, Number of grains spike-1, 1000 grain weight (g), biological yield(kg ha-1), and grain yield (kg ha-1). The data for individual traits were subjected to the ANOVA technique andsignificant means were separated by the LSD test. The analysis of the data showed that methods of sowing werestatistically significant for plant height, No. of grains spike-1, 1000-grain weight and biological yield. The herbicideswere statistically significant for all the parameters investigated except No. of grains spike-1, while the interaction ofmethods of planting with herbicides could not reach the level of significance in any of the traits examined. Among themethods of planting, line sowing was the best followed by line + broadcast sowing. The herbicide mixtures controlledmixed stands of broadleaf and grassy weeds to the tune of 65 to 74% with a consequent increase in grain yield from 58-107%. Buctril-M + Topik 15 WP, 2,4-D + Puma Super 75 EW and Topik 15 WP were segregated as the top scoringapplications by increasing yield to the extent of 107, 104 and 101 %, respectively over the weedy check.
Highlights
Herbicides have increasingly become a key component of weed management programs in developed countries, one being the reason accounts for increased crop yields in these countries
The instant studies were undertaken to evaluate the efficacy of different herbicides alone and in mixture on dynamics of weeds in wheat planted with different methods with these objectives a) to find out the most economical tank mixture of herbicides for the control of weeds in wheat crop b) to figure out the most suitable planting method for wheat cultivation and c) to evaluate the response of wheat to different planting methods and tank mixture of herbicides
A field experiment was conducted at Agricultural College, Tehran of University, in Karaj city 2005-2006 to investigate the efficacy of some herbicide mixtures on grassy and broadleaf weeds and their consequent effect on wheat crop
Summary
Herbicides have increasingly become a key component of weed management programs in developed countries, one being the reason accounts for increased crop yields in these countries. Different reports are available on the efficacy of different herbicides in wheat (Ashrafi 2006, Baghestani et al, 2005; Mohibullah and Ali , 1974; Gill and Walia, 1979; Praczyk, et al 1995; Balyan et al, 1983; Porwal and Gupta (1987); Azad et al 1997; Khan et al, 1999; Khan et al, 2001; Khan et al, 2002; Hashim et al, 2002; Qureshi et al 2002; Zand et al 2007), the herbicide use in Iran is not widely practiced as in the agriculturally advanced nations. The instant studies were undertaken to evaluate the efficacy of different herbicides alone and in mixture on dynamics of weeds in wheat planted with different methods with these objectives a) to find out the most economical tank mixture of herbicides for the control of weeds in wheat crop b) to figure out the most suitable planting method for wheat cultivation and c) to evaluate the response of wheat to different planting methods and tank mixture of herbicides
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