INFLUENCE OF CONSERVATION TILLAGE AND POST-EMERGENCE HERBICIDES ON WEED CONTROL AND COTTON YIELD UNDER WHEAT-COTTON SYSTEM
INFLUENCE OF CONSERVATION TILLAGE AND POST-EMERGENCE HERBICIDES ON WEED CONTROL AND COTTON YIELD UNDER WHEAT-COTTON SYSTEM
Niamat Ullah Khan1*, Azhar Abbas Khan2, Zeshan Hassan2, Umbreen Shahzad2, Muhammad
Arshad Farooq3, Malik Fahim Abbas4, Aamir Roheen4
ABSTRACT
Field experiments were conducted to evaluate the performance of cotton under three
tillage systems, viz., ZT, RT and CT; and five herbicides, i.e., haloxyfop-R-methyl 10.8 EC
(108 g a.i. ha-1), lactofen 24 EC (168 g a.i. ha-1), haloxyfop 10.8 EC + lactofen 24 EC, hand
weeding, and weedy check during 2017 and 2018 at Cotton Research Station, D.I.Khan,
Pakistan, and to explore the best management option for effective weed control and
enhanced yield of cotton grown after wheat. The results revealed that hand weeding and
Floxyfop as post emergence alone or in combination with Lactofen reduced weed density
and weed biomass to the minimum irrespective of the tillage systems. Haloxyfop + lactofen
produced higher seed cotton yield in RT than ZT and CT. Maximum weed population
reduction percentage was recorded under haloxyfop+ lactofen. Broad-spectrum herbicides ×
RT produced the highest seed cotton yield. Weed density and weed biomass were also
lowest in broad-spectrum herbicides × RT. In conclusion, broad-spectrum herbicides under
RT were more effective in wheat based cropping system of D.I.Khan. It is concluded from
present data that reduced tillage is more productive than zero tillage and conventional
tillage and conservation tillage may improve yield of cotton in addition to improvement in
soil quality if severe weeds are not infesting the crop.
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September 2021
Vol. 27, Iss. 3, Pages 253-441
