Studies on efficiency of herbicides in groundnut (Arachis hypogaea L.) – wheat (Triticum aestivum L.) cropping system
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Date
2006
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UAS, Dharwad
Abstract
Agricultural Sciences, Dharwad during kharif and rabi seasons of 2005-06 to study the
efficiency of herbicides in groundnut- wheat cropping system. There were 7 treatment
combinations in each crop and experiment was laid out in randomized complete block design
with three replications.
In kharif groundnut weed control treatments differed significantly. The treatment butachlor
@ 1.5 kg/ha PE + 2 IC at 30 and 40 DAS + 1 HW at 45 DAS in kharif groundnut and in rabi
wheat triasulfuron @ 15 g/ha at 20 DAS recorded significantly lower weed population and
weed dry weight next only to weed free check.
In groundnut application of butachlor @ 1.5 kg /ha PE + 2 IC at 30 and 40 DAS + 1 HW at
45 DAS resulted in highest pod yield (2353 kg /ha) and was on par with pretilachlor @ 1.5 kg
/ha PE + 2 IC at 30 and 40 DAS + 1 HW at 45 DAS, alachlor @ 1.5 kg /ha PE + 2 IC at 30
and 40 DAS + 1 HW at 45 DAS and weed free check. The higher pod yield over weed free
check is due to suppressing weed seed germination and seedling development at early stages
due to the effect of pre-emergent herbicides. In wheat application of triasulfuron @ 15 g /ha
at 20 DAS resulted higher grain yield (3028 kg /ha) but was on par with weed free check
(3182 kg /ha). In groundnut maximum net income of Rs.20150 /ha and benefit cost ratio of
1:1.20 was obtained with butachlor, whereas in case of wheat triasulfuron recorded maximum
net return of Rs. 15996/ha and benefit cost ratio of 1:1.47.