Integrated weed management in marigold (Tagetes erecta L.)
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Date
2020
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Punjab Agricultural University, Ludhiana
Abstract
The present study entitled “Integrated weed management in marigold (Tagetes erecta L.)” was
conducted during summer and rainy season of 2019 at Research Farm, Punjab Agricultural
University, Ludhiana, Punjab. The study aimed at finding out the best and economically
feasible method for weed control in marigold. In summer season, spreading of paddy straw
mulch 6.25 t ha-1 at planting and directed application of paraquat dichloride 0.30 kg ha-1 after
50 days of transplanting and, in rainy season, combination of paddy straw mulch 9.40 t ha-1
and paraquat dichloride 0.30 kg ha-1 after 50 days of transplanting had the lowest total weed
density. Total weed dry biomass was lowest under hand weeding (at 30 and 60 days). Hand
weeding treatment recorded the highest marigold plant spread, stem diameter and branches per
plant which were followed by paddy straw mulch 9.40 t ha-1 plus paraquat dichloride 0.30 kg
ha-1. Under paddy straw mulch 9.40 t ha-1 plus paraquat dichloride 0.30 kg ha-1, marigold took
minimum number of days to bud visibility, from bud to flower opening and first flower
production. Number of flowers per plant, average flower diameter and average weight of
flower were highest under treatment paddy straw mulch 9.40 t ha-1 plus paraquat dichloride
0.30 kg ha-1. To conclude, spreading paddy straw mulch 9.40 t ha-1 at planting followed by
directed application of paraquat dichloride 0.30 kg ha-1 after 50 days of transplanting was
found to be the best treatment in terms of weed control, marigold flowers yield and net returns.
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Citation
Gurpinder Singh (2020). Integrated weed management in marigold (Tagetes erecta L.) (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.