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Chaudhary Charan Singh Haryana Agricultural University, Hisar

Chaudhary Charan Singh Haryana Agricultural University popularly known as HAU, is one of Asia's biggest agricultural universities, located at Hisar in the Indian state of Haryana. It is named after India's seventh Prime Minister, Chaudhary Charan Singh. It is a leader in agricultural research in India and contributed significantly to Green Revolution and White Revolution in India in the 1960s and 70s. It has a very large campus and has several research centres throughout the state. It won the Indian Council of Agricultural Research's Award for the Best Institute in 1997. HAU was initially a campus of Punjab Agricultural University, Ludhiana. After the formation of Haryana in 1966, it became an autonomous institution on February 2, 1970 through a Presidential Ordinance, later ratified as Haryana and Punjab Agricultural Universities Act, 1970, passed by the Lok Sabha on March 29, 1970. A. L. Fletcher, the first Vice-Chancellor of the university, was instrumental in its initial growth.

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Author: Ajay Singh × End date: 2018 × Start date: 2018 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Evaluation of different herbicides on kharif maize and their residual effect on succeeding wheat crop
    (CCSHAU, 2018) Ajay Singh; Mehar Chand
    The present investigation entitled “Evaluation of different herbicides on kharif maize and their residual effect on succeeding wheat crop” was studied at Regional Research Station, Karnal during kharif 2015 and 2016 and rabi 2015-16 and 2016-17 with the objectives, to find out the effect of different weed control methods on weed flora, growth and yield of kharif planted maize, to study the residual effect of different herbicides applied in maize on succeeding wheat crop and to work out the economics of different weed control treatments. The experiment was conducted in Randomized Complete Block Design and comprised of seventeen treatment combination applied in kharif maize. The treatments were atrazine 750 g/ha PRE (T1), atrazine 1000 g/ha PRE (T2), atrazine 750 and 500 at PRE and 35 DAS (T3), atrazine 750 g/ha as PRE fb 2, 4-D 500 g/ha at 35 DAS (T4), atrazine 1000 g/ha as PRE fb one hoeing at 35 DAS (T5), one hoeing at 20 DAS fb atrazine 500 g/ha at 35 DAS (T6), alachlor 2000 g/ha as PRE (T7), alachlor 2000 g/ha as PRE fb hoeing at 35 DAS (T8), alachlor 2000 g/ha as PRE fb 2, 4-D 500 g/ha at 35 DAS (T9), atrazine 375 g/ha+ alachlor 1000 g/ha as PRE (T10), tembotrione 120 g/ha +S at 35 DAS (T11), tembotrione 140 g/ha +S at 35 DAS (T12), alachlor 2000 g/ha as PRE fb tembotrione 120 g/ha +S at 35 DAS (T13), atrazine 1000 g/ha as PRE fb tembotrione 120 g/ha +S at 35 DAS (T14), hoeing twice at 20 and 35 DAS (T15) , weedy check and weed free. Major weed species infesting the experimental field were Cyperus rotundus, Brachiaria reptans, Dactyloctenium aegyptium, Amaranthus viridis, Digera arvensis, Phyllanthus niruri and Portulaca oleracea. The treatment alachlor 2000 g/ha as PRE fb tembotrione 120 g/ha +S at 35 DAS (T13) provided excellent control of all types of weeds at different stages of the crop growth during both year of experimentation. Among herbicide treatments at 50 DAS, alachlor 2000 g ha-1as PRE fb tembotrione 120 g ha-1 provided highest weed control efficiency (94.6 and 95.6 %) during both the years. Maximum grain yield (6505 and 6903 kg ha-1) and yield attributes of maize were obtained in weed free treatment which was statistically at par with alachlor 2000 g/ha as PRE fb tembotrione 120 g/ha +S at 35 DAS (T13) (6380 and 6816 kg ha-1). No visual phyto-toxicity of any applied herbicide was observed in maize crop. All herbicide treatments employed in kharif maize, irrespective of their dose and application time did not show any residual carryover effect on succeeding wheat because of rapid microbial degradation of herbicides due to four flood irrigation applied to kharif maize and occurrence of 377.8 and 501.7 mm of rainfall between the time of application of herbicides and sowing of succeeding wheat crop.