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Confirmation of ALS inhibitor herbicide resistance in Echinochloa colonum


The International Journal of Biological Research (TIJOBR)

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Faisal Mushtaq1*, Abdur Rehman1, Shumila Shahid2, Hafiz Muhammad Umair Waqas4, Hafiz Muhammad Waseem1, Saeed Ahmad3, Sobia Manzoorand Zeeshan Latif1

Corresponding author: faisalmushtaq3767@gmail.com
Submitted Accepted Published
Jul 18,2018 Dec 11,2018 Jan 13,2019

2019 / Vol: 2 / Issue: 1


Abstract


Herbicides resistance is emerging as an important trend in global farming and this problem is increasing significantly. Herbicide resistance is developed in plants with the passage of time through evolution. ALS (Acetolactate synthase) is enzyme naturally occurred in plants involves in synthesis of amino acid and involved to catalyze the initial process of synthesis of various proteins that are branched in character. Bispybribic sodium herbicide inhibits the protein synthesis and generally marked as vital herbicide against weeds infestation in rice. The present experiment was performed to evaluate the prospective of ALS inhibitor herbicides resistance on different accessions of Jungle rice (Echinochloa colonum L.) under CRD with factorial arrangement. Mortality %, Visual injury %, LD50, GR50, Resistance index and Biomass % decrease over control parameters were recorded features of proposed experiment. The date of recorded parameters were analyzed properly by applying Fisher’s analysis of variance method and average data of all treatments were associated by least significant difference (LSD) test having 5% level of probability. After the application of treatments, the plants were supplied adequate amounts of water and nutrients for 30 days. Plant death (live or dead counts) was recorded 30 d after treatment (DAT). The application of four different doses of the herbicide was performed after 15 days of germination, with seedlings at the stage of 2 to 3 leaves. Sprayer configuration and growth condition for all biotypes for same. Significant and high biomass was showed by ECFS-7 (76.5) and ECFS-4 (75.66) as compared to EC-FS-SS (31.007). Less injury rate was showed by ECFS-4 (50.12) and ECFS-7 (53.69%) as compared to EC-FS-SS which show maximum injury percentage (72.18%). Maximum mortality percentage was showed in EC-FS-SS (76.062) and less in EC-FS-7 (42.37 %).   LD50 of Accessions at different levels was analyzed with PROC PROBIT. The highest LD50 values were observed in EC-FS-7 (1.60) which was followed by EC-FS-5. The lowest value of LD50 was observed in susceptible biotype. The EC-FS-7 shows maximum GR50 as compared to EC-FS-SS. The maximum growth reduction was recorded at double dose in all accessions. The EC-FS-7 showed maximum RI value as compared to EC-FS-SS. The lowest resistance index is recorded in susceptible EC-FS-SS. The lowest value of susceptible standards indicates that lower dose of herbicide is required to kill the weeds due to low resistance against herbicide.

Key words: ALS inhibitor herbicides, resistance, Jungle rice (Echinochloa colonum L.)


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