PJB-2013-71
STUDIES ON EFFICACY OF DIFFERENT HERBICIDES AGAINST WEEDS IN POTATO CROP IN PESHAWAR
ZAHID HUSSAIN1*, FAZAL MUNSIF2, KHAN BAHADAR MARWAT1, KAWSAR ALI2, RIAZ AHMAD AFRIDI1 AND SHAHIDA BIBI1
Abstract
Prevention of weed–crop competition at an early stage plays a very important role. Potato is grown abundantly in our country and particularly in Khyber Pakhtunkhwa province, but due to lack of proper attention potato yield is always very low as compared to the developed countries. Regardless of other factors, weeds are one of the serious obstacles in producing higher yields. In this context, an experiment was designed in which there were a total of nine treatments including eight herbicides and a weedy check for comparison. Metribuzin 70% WP (metribuzin) @ 0.63 kg, Gramoxone 200SL + Dual gold 960EC (gramoxone+s-metolachlor) @ 3.75L+2.5L, Sencor 70WP (metribuzin) @ 0.63 kg, Torrent 50WDG (terbutryn+terbuthylazine) @ 1.75kg, Solanum 500SC (terbutryn+terbuthylazine) @ 1.75L, Dual gold 960EC (s-metolachlor) @ 2.5L, Multiquat 200SL (gramoxone) @ 3.75 L, and Gramoxone 200SL (gramoxone) @ 3.75L ha-1 were the herbicidal treatments that were evaluated. The results revealed that all the herbicides had a significant effect on weed density m-2 and also on tuber yield of potato. Herbicidal treatments significantly reduced the weed population as compared to the control treatments, with 104 weeds m-2. All the treatments resulted in more than 80% mortality of the weeds that infested the field before application of the herbicides. No crop injury was observed in any of the herbicides used in the experiment. The herbicide combination, Gramoxone+Dual gold gave the highest potato tuber yield (15910 kg ha-1) which was 36% higher than the weedy check treatments (10162 kg ha-1). However, it was statistically similar to Gramoxone and Multiquat treatments that resulted in tuber yield of 15288 and 15022 kg ha-1, with percent increase as 33.53 and 32.35%, respectively. Therefore, Gramoxone+Dual gold was the best treatment in the experiment for effective weed control and profitable tuber yields of potato crop in agro-ecological conditions of Peshawar.
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