Studies on weed management practices in Gladiolus
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Date
2019
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CCSHAU
Abstract
The present investigation entitled “Studies on weed management practices in Gladiolus” was conducted during 2018-19 at Centre for Quality Planting Material, RDS Seed Farm CCSHAU, Hisar, Haryana. The experiment comprised of 17 treatments laid out in simple randomized block design with three replications i.e. nine herbicidal treatments with pre and post-emergence application, five mulch treatments either alone or in combinations with herbicide, one hand hoeing, one weed free and one weedy check. Polypogon monspeliensis, Phalaris minor, Cyperus rotundus and Cynodon dactylon among monocots and Chenopodium murale, Convolvulus arvensis, Fumaria parviflora and Coronopus didymus in dicots were found dominant weeds in experimental field. Among the application of herbicides or mulch materials either alone or in combinations, T13 (black polyethylene mulch) was observed very effective in controlling weeds followed by T12 (pendimethalin 1000 g fb HW + pendimethalin 1000 g/ha), T14 (mulching of straw fb HW hand weeding) and T6 (pendimethalin 1500 g/ha + straw mulch). In crop parameters, however T16 (weed free) was observed better in vegetative and floral characteristics but T13 was also observed at par with T16 viz. early sprouting of corms, plant height excluding spike (52.60 cm), plant height including spike (102.87 cm), average leaf area/sprout (547.74 cm2), flower parameters viz. days taken for spike emergence (65.67 days), days taken for colour breaking in basal floret (73.67 days), days to opening basal floret (76.20 days), duration of flowering (25.47 days), length of spike (74.00 cm),rachis length (53.67 cm), number of florets/spike (17.67), diameter of floret (9.53 cm), g/ha) number of marketable spikes (17.67). Regarding corm and cormel production, T14 was observed better with diameter of corm (6.12 cm), weight of corm (52.27 g), number of cormels/plant (19.07), weight of cormel/plant (5.22 g), number of marketable daughter corms (20.00) followed by T15 (hand hoeing) and T13. Amongst the herbicidal treatments, T12 was observed comparatively more efficient in controlling weeds and resulted in better vegetative and reproductive parameters. Interestingly, the herbicidal applications of oxyflurofen and metsulfuron-methyl (T2 &T8) caused phytotoxicity to the crop plants and the symptoms of phytotoxocity were observed at all the dates of observation. Among various weed management practices tested in this investigation, the application mulch material (either paddy straw or black polyethylene sheet) was observed best with the aspect of weed control as well as flower & corm production in gladiolus.
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