استعمال الكلايفوسيت والدلابون لمكافحة الادغال المعمرة في العراق

Abstract

Control of johnsongrass ,Bermudagrass and Hairy – nodegrass by Glyphosate [N-(Phosphono methyl) glycine] and Delapon [2-2 dichloro proponic acid] in different concentrations ,time of application and their interaction ,were studied in the experimental field of college of Agriculture/ Abu-Ghuraib during the period between 1/4/2001 to 1/12/2002.to eliminate weeds like Johnsongrass ( Sorghum halepense L), Bermuda grass (Cynodon dactylon L.) and Hairy- nodegrass (Dicanthium annulatum). The results showed that there was asignificant diferences between treatments on grwoth of perennial weeds Thetreatment where glyphosate (1 kg a.i.e)/ ha plus dalpon (2 kg a.i.e) /ha was applied gave highest of weeds killing rates (94.7%,96.7%,98.3%) and ( 99.3%,100%,100%) after 2 and 4 months of third spray ,least weed dry weight (38),(23.5) ,(18.7) gm/m2 and the least number rate of new growthes (1),(0.7),(0.3), after 12 months of the first spray . It could be concluded that the application of mixed herbicides and seguency have different effects on weeds .The individual uses of the herbicides have less effects on weeds of other applications of Control treatments.