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| Pre-emergence Application of Imazethapyr for Weed Control in Soybean (Glycine max (L.) Merr.), Gezira State, Sudan
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Suhaip A. M. Zain , Awadallah B. Dafaallah and Mohamed S. Zaroug
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Abstract:
Soybean is one of the most important crops grown for the purpose of oil production in many countries of the world. In the State of Sudan, in recent years, the interest in the soybean crop has increased due to the increase in demand and the lack of supply for the crop in the local market, as well as the importance of the crop in many industries, especially food. Weeds are one of the factors that negatively affect the production and productivity of the soybean crop. The current study was conducted with the aim of assessing the pre-emergence application of the chemical imazethapyr in weed management of soybeans in Gezira State, Sudan. A field experiment was conducted at the farm of Gezira Research Station of the Agricultural Research Corporation in Wad Medani, Sudan during the 2018/19 agricultural season. Three doses (0.0375, 0.050, and 0.0625 kg ai ha-1) of imazethapyr (Pursuit(r) 100 SL) were used as a pre-emergence treatment. For comparison, weeded and un-wedded treatments were used as a control. A randomized complete block designed was used and each treatment was replicated four times. Descriptive analysis and analysis of variance were performed to analyze data. Duncan's Multiple Range test was used for separation of the means. The results showed that all tested herbicide doses were effective in controlling weeds. The three doses significantly decreased weed infestation in comparison with un-weeded control and significantly increased the yield and different growth attributes of soybean compared un-weeded control treatment. Using of imazethapyr at the dose 0.0625 kg a.i. ha-1 significantly reduced weeds (grasses and broad leaf) in the crop. It was also the best in terms of growth and productivity. The highest yield of seed (1383.3 kg ha-1) was obtained in the herbicide at the dose 0.0625 kg a.i. ha-1. The results of chemical analysis for the detection of pesticide residues in soybean seeds showed that there were no residues of the tested pesticide. The study concluded that the use of imazethapyr at a dose of 0.0625 kg a.i. ha-1 as pre-emergence treatment is effective and safe in weed management in soybean crop.
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