Evaluation of the Efficacy of some New Herbicides in Controlling Weeds Associated with Corn Crop (Zea mays L.)

Abstract

A field experiment was conducted in one of the fields of Alton Kupri district in Kirkuk governorate in the autumn season of 2021 to study the effectiveness of three types of Bush pesticides recently introduced into Iraq in combating the growing bush with the yellow maize crop Zea mays L. A factorial experiment was applied according to the design of R.C.B.D with two factors. The two factors were the type of pesticide, which included three types (Cornet, Astran C, and Master Power). In comparison, the second factor was pesticide spraying rates, including five factors, namely (without pesticide, manual weeding, and spraying the pesticide at a rate of ½ the recommended amount). Spray the recommended amount and spread the pesticide at the rate of 1 ½ the recommended amount. The characteristics of the bush were studied and included (the density of the weeds, the percentage of control, and the dry weight of the control bush), while the traits of the yellow corn crop were (plant height, leaf area, number of days until flowering, number of days until maturity, number of ear rows, number of grains in the ear, weight of 300 grains and grain yield plant and total grain yield). The pesticide Astran C was discerned over the rest of the other pesticides in reducing the bush density, increasing the percentage of control and decreasing the dry weight of the bush when sprayed with the recommended quantity and the higher quantity. The number of plants was four after the control, which did not differ from manual weeding, which achieved three plants, while the control percentage was Achieved 91.7% for this pesticide when sprayed with the highest amount (1½).