University of Khartoum

Preemergence Use Of Metribuzin in Controlling Weed in Potato ( Solanum Tuberosum L .)

Preemergence Use Of Metribuzin in Controlling Weed in Potato ( Solanum Tuberosum L .)

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Title: Preemergence Use Of Metribuzin in Controlling Weed in Potato ( Solanum Tuberosum L .)
Author: Mohemed, Nasr El Din Mohemed Ahmed
Abstract: This study was conducted at The River Nile State ( northern Sudan ) ; Hagar Elassal Province, 150 km, north of Khartoum at Elbsabeer town among the fields of traditional, commercial potato producers , during the growing seasons 2000/2001 and 2001/2002 . The study was indented to evaluate the efficacy of two pre-emergence soil-applied herbicides Metribuzin SC480 at dose of 0.7 kg a.i / fed, 0.5 kg a.i / fed and 0.35 kg a.i / fed and Metribuzin WP 70% at dose of 300 g product/ feddan on weed control , to evaluate their effect on growth and yield of potato ( Solanum tuberosuim. L . ) . Results of this investigation showed a significant increase in number of leaves per plant and plant height (cm ) in both seasons due to the use of herbicides and hand-weeding treatments as compared to the control . Number of branches per potato plant was significantly increased by the use of Metribuzin dose ( 0.7) kg a.i / fed and by hand-weeding as compared to control . Application of the two herbicides at their different rates and hand-weeding treatments resulted in a great increase in number of branches, shoot fresh weight and oven-dry weight per potato plant (g) compared to control in both two seasons . The different rates of herbicides MetribuzinSC480 had significantly increased yield of potato plant ( ton / feddan ) in both seasons as compared to control and hand-weeded treatment .The two herbicides used gave good control of annual weeds (94.68%ــــ 71.45% ) with (99%--84.22 ) control of broad-leaved weeds and (98.57 ــــ 64.25% ) control of graminaceous weeds . Some annual weeds like Xanthium brasilicum vell.; Ipomoea cordofana choisy , Merremia emerginata (Burm.f.) Hallier f., Datura stramonium L. and Datura innoxia ; .) which have shown some tolerance to other herbicides like pendimethalin have been efficiently controlled while the perennials weeds like Cyperus rotundrus L . and cynodon dactylon L). are not affected by the used herbicides though they show leaf yellowing .
Description: March 200581page
URI: http://khartoumspace.uofk.edu/handle/123456789/10976
Date: 2015-05-18


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