Chemical weed control in potato
1995
Halimie, M.A. (Plant Protection Inst., AARI, Faisalabad (Pakistan)) | Ahmad, M.R. | Ahmad, M.
In a field trial at Faisalabad, Igran 500 FW, was compared with Stomp 330 E for control of Trianthema monogyna, Chenopodium album and Melilotus parviflora; some of the major problem weeds of potato crop in the Punjab. The Igran 500 FW @ 2.0 litre ha-1 and Stomp 330 E @ 3.75 litre ha-1 were applied on the soil at pre-emergence stage. The data recorded 30 days after treatment showed significant differences in weed density and subsequently tuber yield when compared with the check. Igran 500 FW gave better weed control with minimum population of 17.33 and 29.0 weeds m-2 during 1992 and 1993, respectively. Stomp 330 E performed little poor with slightly higher density of 29.0 and 40.33 weeds m-2, during the same year which is, however, statistically at par with the Igran 500 FW. The comparison with the check explored that 92.6 and 88.5% weeds were controlled with Igran 500 FW, whereas, it was 87.7 and 84.0% with Stomp 330 E. The weed control efficacy of both the herbicides differed significantly as compared to the check where 235.66 and 252.33 weeds m-2 were observed during both the study years, respectively. The tuber yield fluctuations were directly correlated with the weed density. The maximum tuber yields of 19.05 and 23.91 t ha-1 were recorded from Igran whereas it was 19.00 and 21.73 t ha-1 from Stomp 330 E treated plots. Both the formulations were found safe and selective as no phytotoxicity or physiological disorder was seen till crop harvest. The results show that Igran 500 FW was more efficient in controlling the potential weeds of potato crop and increasing tuber yield per hectare than Stomp 330 E.
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