Evaluation of Integrated Control Methods of Purple Nutsedge (Cyperus rotundus L.) In Transplanted Onion

Abstract

Onion (Allium cepa L.) is one of the most important vegetable crops in the world. Weeds are the most global problem in onion production. Purple nutsedge (Cyperus rotundus L.) is one of the most damaging weeds, which propagates rapidly through extensive underground system and tubers. The aims of this study were to evaluate the effect of solarization duration and tuber weight on characters of C. rotundus and assessed different treatments on the weed control and onion yield. For this purpose, two separate experiments were conducted in South of Kerman Agricultural Research and Education Center, Jiroft, Iran. The solarization experiment conducted to investigate the effects of solarization duration [0 (control), 5, 10, 15, and 20 days] and tuber weight (small, medium and large) on tuber viability and the number of produced tubers of C. rotundus. The weed management experiment conducted as a randomized complete block design with eight weed management methods with three replications. The results of the solarization experiment showed that in all solarization duration tuber viability eliminated except for control. The maximum percentage of tuber viability found in the interaction of non-solarization with large and medium tuber weights. Also, the results of the weed management experiment revealed that after hand plucking treatment, deep disking twice with 20 days interval followed by application of Glyphosate twice after each disk treatment (T8) was the best weed management method. The highest onion yield was obtained in hand plucking and T8 treatments by 96.53 and 70.67 ton ha-1, respectively.

Keywords

• Solarization
• Purple nutsedge
• Onion
• Tuber weight
• Glyphosate

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