Flora, Density and Efficiency of Weed Affected Sugarcane Controlled by Chemical Herbicides

Abstract

Aims: The aims of the study was to determine the weed flora, weed density and weed control efficiency of different weed types affect sugarcane as plant cane crop. Study Design: Experimental design of the study was a Completely Randomized Design (CRD) with four replication. Place and Duration of Study: A field experiment was conducted in two experimental sites in Sugarcane Research Center Farm at Guneid, Sudan during 2019-2020. Methodology: Four chemical herbicides treatments; W1: un weeded (control), W2: Ametryne (3.8 L/ha) + Atrazine (3.8 L/ha), W3: Atrazine (3.0 L/ha)+Pendimethalin (2.9 L/ha) and W4: and Metribuzin (5.21 L/ha)+Pendimethalin (3.57 L/ha) was used for sugarcane. A knapsack sprayer (CP3) with a capacity of 16 liter was used for applying herbicides. Weed flora, density and efficiency was determined in the field. Results: The results related to weed flora for plant cane crop in the two different experimental sites identified about 15 weed species classified into two categories; grasses and broad-leaves weed with the dominance of broad leaves weed. The total average number of weed in the un weeded plots in the two different experimental sites ranged between 13 to 17 % of the total weeds were grasses and the rest were broad-leaved weeds which ranged between 87 to 83 %.  The experiment revealed that  treatment W4: (Metribuzin 5.21 l/ha + Pendimethalin 3.57 l/ha) recorded significant value  at (p<0.05)  with the lowest weed density, and the highest weed control efficiency percent compared to the other chemical herbicide’s treatments and the control in plant cane crop in the two different experimental sites. Conclusion:  the findings of the study showed that there was about 15 weed species classified into two categories; grasses the rest were broad-leaved weed.The broad leaves weed were dominance over grass weed. The treatment W4: (Metribuzin 5.21 l/ha + Pendimethalin 3.57 l/ha) was the best for weed control in sugarcane in the two sites.