Chemical weed control in field pea (Pisum sativum var. hortense)
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Date
2018
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CCSHAU
Abstract
The present investigation entitled “Chemical weed control in field pea (Pisum sativum var.
hortense)” was studied during rabi season of 2017-18 at CCS Haryana Agricultural University
Regional Research Station, Karnal. The experimental field was mainly infested with broad leaved
weeds viz., Fumaria parviflora, Coronopus didymus, Anagallis arvensis and Chenopodium album
among which F. parviflora and C. didymus constituted more than 70 % weed population throughout the
season. Pre-emergence application of pendimethalin + imazethapyr (Ready-mix) at 1250 g ha-1
provided 100% control of Coronopus didymus, Anagallis arvensis and Chenopodium album up to
harvest. Among the herbicidal treatments, the maximum weed control efficiency of 92 % at 30 DAS,
83 % at 90 DAS and 77 % at harvest was recorded with pre-emergence application of pendimethalin +
imazethapyr (Ready-mix) at 1250 g ha-1 while at 60 DAS, post-emergence (2-4 leaf stage) application
of imazethapyr + imazamox (Ready-mix) at 80 g ha-1 provided the highest weed control efficiency
(94%). Post-emergence application of imazethapyr alone and its ready-mix combination with
imazamox at 60-80 g ha-1 caused phyto-toxicity (5-10 %) at 30 DAS which was mitigated within two
weeks after application but reduced the yield and yield attributes of field pea up to some extent. The
maximum seed yield (18.08 q ha-1) and yield attributes of field pea were recorded with weed free
treatment which was statistically at par with pre-emergence application of pendimethalin +
imazethapyr (Ready-mix) at 1250 g ha-1. Also, ready-mix combination of pendimethalin and
imazethapyr proved better than the alone application of pendimethalin as well as imazethapyr at all
doses in controlling weed flora in field pea.
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