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Subject: Agronomy × Author: Ahmad Farhad Nekhat × Start date: 2020 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Evaluation of herbicides for control of broad-leaf weeds in wheat
    (CCSHAU, Hisar, 2020-07) Ahmad Farhad Nekhat; Dhaka, Anil Kumar
    A field experiment entitled “Evaluation of herbicides for control of broad-leaf weeds in wheat” was conducted during Rabi season of 2018-19 at Research Farm area of CCS Haryana Agricultural University, Hisar, Haryana. The experiment was comprised of twelve post emergence herbicides (sole and their mixture) treatment i.e (Halauxifen-methyl ester + florasulam 40.85%WG + polyglycol 26-2N (0.25% v/v), metsulfuron-methyl 20 WP + 0.25% NIS surfactant, carfentrazone ethyl 40DF, 2, 4-D Na (80WP), 2, 4-D Ester (38 EC), metsulfurone-methyl 10% WP + carfentrazone 40DF + 0.2% surfactant, 2, 4-D Na + carfentrazone, 2, 4-D Ester + carfentrazone, halauxifen-methyl + florasulam + carfentrazone + surfactant, aclonifen 500 SC, diflufenican 100 SC and aclonifen 500 + diflufenican 100 SC) with different doses applied at 35 DAS, one weed free and weedy check on wheat variety WH 1105. Experiment was laid out in randomised block design with three replications. The major broad-leaf weeds infested wheat field were Chenopodium album, Convulvolus arvensis, Rumex dentatus, Anagallis arvensis and Melitotus indicus. Among all the herbicides and their mixtures tested, application of aclonifen 500 + diflufenican 100 SC @ 1750 + 1750 g/ha closely followed by application of Halauxifen-methyl + Florasulam + Carfentrazone + surfactant @ 24.99 + 50 + 750 g/ha at 35 DAS was found most effective against broad-leaf weeds except Convolvulus arevensis in wheat. Application of aclonifen 500 + diflufenican 100 SC @ 1750 + 1750 g/ha at 35 DAS was recorded with significantly higher plant height (110.7 cm), dry matter accumulation (346.3 g/mrl), effective tillers (107.7 /mrl), grains per spike (54.7), grain yield (6282 kg/ha), weed control efficiency (71.7%), net returns (65,733 Rs./ha) and B:C (1.82) at harvesting, which were 15.3, 18.3, 17.4, 21.6, 50.9, 71.1, 193.7 and 41.1 percent higher than weedy check plot, respectively. Based on study it is concluded that application of aclonifen 500 + diflufenican 100 SC @ (1750 + 1750 g/ha) at 35 days after sowing may be the most effective and economical to control the broad-leaf weeds and to obtain higher yield of wheat