الفهرس Only 14 pages are availabe for public view
 |  | from | 138 |  |  |
| | | from | 138 | | |
Abstract
Two field experiments were carried out during 2012/13 and 2013/14 winter seasons, at Mallawy Agricultural Research Station, Agriculture Research Center (A.R.C.), Egypt to study the effect of mineral or vegetable oils as adjuvant on the efficacy of certain graminicide Illoxan 36 % EC (diclofop-methyl), broad-leaved herbicide Brominal 24 % EC (bromoxynil-octanoate) and Panther 55 % SC (isoproturon + diflufenican) a ready formulated herbicide for controlling grassy and broad-leaved weeds. The above herbicides were used at the local recommended and reduced rates (75 % of recommended rates) with or without adjuvant on associated weeds, grain yield and its components of bread wheat (Triticum aestivum L.). Results indicated that the addition of (mineral or vegetable oils) at 1% of spraying volume (2 l/fed.) could replace 25 % of bromoxynil octanoate, diclofop-methyl and isoproturon + diflufenican without loosing any significant activity on the control of weeds or yield. The recommended rates of bromoxynil-octanoate, diclofop-methyl and isoproturon + diflufenican at 240, 360 and 330 g a.i/fed alone showed similar results as their reduced rates at 180, 280 and 247.5 g a.i/fed., respectively plus adjuvants (mineral or vegetable oils) at 1 %; with respect to reducing dry weight of weeds and increasing wheat yield and its components. Concerning yield and its components the sequence of reduced rates of bromoxynil-octanoate ( 180 g a.i/fed.) and diclofop-methyl (280 g a.i/fed.) when tank mixed with mineral or vegetable oils, gave the highest values of wheat yield components (no. of spikes/m2, no. of grains/spike, grain weight/spike (g) and 1000-grain weight as well as grain and straw yields which were the same as the recommended rates