Two field experlments were conducted during 1997/1998 and 1998/1999, at
the Experimental Station of the National Research Centre at Shalakan. Kalubia
Governorate to study the physiological response of wheal plants to different
concentration of atonik ( 0 , 2C ,40 and 60 mgll ) and Pix ( 0 . 50 , 100 and 200 mgll )
as well as their interaction on vegetative growth, yield and its components as well as
the content of crude protein and total carbohydrate in produced grains. The data
indicated that spraying atonik with different concentrations at all stages led to
significant increases in plant height, number of tiller, number of spikes. blades area,
leaf area index, dry weight of plant. spike weight and length. 1000· grains weight.
grain and straw yield per plant and per fed. VoJhile , spraying pix led to signifICant
decreases plant height, both number of tiller, and spikes/plant. leaf area, leaf area
index and carbohydrate percentage in grains, Spraying wheat planls with atonik at 60 mgJ1 or pix at 50 mg/l caused the
highest values in most of growth characters. Spraying plant with 60 mgllalonik and
pix at 100 and 200 mglt attained sfgnificant increases in economic yield and ils
components as compared with other treatments. Application of etonik treatments in
general had a positive effect in most cases on protein and carbohydrate percentage.
atonik at 40 and 60 mgll was more effective. while, the highest value was obtained at
100 mgll pix on crude protein content and 50 mgIJ pix on total carbohydrate content. Interaction between atonik at 40 and 60 mgll and pix at 50 and 100 mgll
gave the highest values of growth Characters. Application atonik at 60 mgJI with pix at
200 mgll increased significantly yield and its components as compared with of her
treatments, Interaction between atonik 60 mgIJ with pix at 100 mgll and atonik at 20
mgJI with pix at 200 mgll gave the highest values of crude protein and carbohydrate
percentage in produced grains. respectively.