Effect of weed management practices on growth and yield of Indian mustard [Brassica juncea (L.) Czern &Coss.]
Loading...
Date
2014
Authors
Yadav, Jetendra
Journal Title
Journal ISSN
Volume Title
Publisher
Rajendra Agricultural University, Pusa (Samastipur)
Abstract
A Field experiment was planned and conducted during the rabi season of 2012-13 at Agricultural Research Farm of Tirhut College of Agriculture, Dholi, Muzaffarpur under Rajendra Agricultural University, Pusa, Samastipur, Bihar (India) to study the effect of different weed management practices on weeds, crop growth, yield of mustard, magnitude of yield losses caused by weeds and to workout the economics of weed management practices. The experiment was laid out in randomized block design with three replications. The soil of the experimental plot was sandy loam. There were thirteen treatments i.e., pendimethalin @0.75 kg /ha (P.E); pendimethalin @1.0 kg /ha(P.E); pendimethalin Stomp Extra 38.7 CS @0.75 kg /ha (PE); oxadiargyl @0.09 kg/ha (PE ); trifluralin @0.75 kg/ha (PPI); oxyfluorfen @0.15 kg /ha (P.E); quizalofop @0.06 kg /ha (20-25 DAS); clodinafop @0.06 kg /ha (20-25 DAS); isoproturon @1.0 kg /ha(P.E); isoproturon @1.0 kg./ha (30 DAS); weeding by wheel hoe; weed free (HW at 20 and 40 DAS) and weedy check.
The variety of Indian mustard ‘Rajendra Sufalam’ was line sown 30 cm apart on November 12th, 2012 and harvested on March 19th, 2013. During crop period, a total rainfall of 32.6 mm was received. Observations on growth, yield attributes and yield were recorded. Common weeds were identified and plant height, number of branches per plant,
branches per plant, number of siliqua per plant, number of seeds per siliqua and seed yield obtained under T12 (HW at 20 and 40 DAS) had significantly higher values than T4 (oxadiargyl 0.09 kg/ha as PE), T5 (trifluralin 0.75 kg/ha as PPI), T7 (quizalofop 0.06 kg /ha as POE), T8 (clodinafop 0.06 kg/ha as POE) and T13 (weedy check). Though, T12 (HW at 20 and 40 DAS) recorded maximum values of plant height (164.97 cm), number of branches per plant (12.48), number of siliqua per plant (378.27), number of seeds per siliqua (10.90), seed yield (1989 kg/ha)and stalk yield (4159 kg/ha), it was closely followed and found statistically at par with T11 (weeding by wheel hoe at 30 DAS) and T10 (isoproturon 1.0 kg/ha as POE).
Although the significant highest gross return (Rs.70078/ha) was recorded by weed free (HW at 20 and 40 DAS) over other weed management practices except weeding by wheel hoe at 30 DAS; highest net return (Rs.40339/ha) was not realized by weed free situation but it was realized by wheel hoe at 30 DAS which was significantly superior than oxadiargyl 0.09 kg/ha as PE, trifluralin 0.75 kg/ha as PPI, quizalofop 0.06 kg /ha as POE, clodinafop 0.06 kg/ha as POE, oxyfluorfen 0.15 kg/ha as PE, isoproturon 1.0 kg/ha as PE and weedy check and was found statistically at par with the remaining weed management practices. Among the herbicides used, highest gross return (Rs. 62142/ha) and net return (Rs.39225/ha) were recorded by post emergence application of isoproturon 1.0 kg/ha. Again, the highest benefit: cost ratio (1.75) was not realized by the treatment which recorded the highest net return but it was recorded by post emergence application of isoproturon 1.0 kg/ha which was significantly superior than oxadiargyl 0.09 kg/ha as PE, trifluralin 0.75kg/ha as PPI, quizalofop 0.06 kg/ha as POE, clodinafop 0.06 kg/ha as POE, isoproturon 1.0 kg/ha as PE, weedy check and weed free practice.
Description
Keywords
null