Integrated Weed Management in Pigeonpea (Cajanus cajan (L.) Millsp.)
2013
Uncontrolled weeds cause considerable losses in the grain yield of pigeonpea. Field experiments were
conducted for seven years from 1998 to 2004 on a loamy sand soil to study the effect of weed management on
weeds, growth and grain yield of pigeonpea. In some years, weed dry matter was higher than in others, due to
variation in rainfall received. Two hand weedings, pendimethalin in integration with hand weeding or ridging
or both and paraquat in integration with hand weeding resulted in high weed control efficiency. Uncontrolled
weeds caused 31.0 to 52.8% reduction in pigeonpea grain yield in different years. The sole application of
pendimethalin as pre-emergence at 45 or 75 kg ha was less effective in controlling 1 weeds and improving grain
yield than the above mentioned treatments as pigeonpea is a long duration (about 140 days) crop and weeds
emerge in different flushes due to rainy season. Integration of pendimethalin 0.45 kg ha 1 + hand weeding
30 DAS + ridging 50 DAS provided the high weed control efficiency and produced the highest grain yields of
pigeonpea in all the years of study
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