International Journal of Advanced Chemistry Research

International Journal of Advanced Chemistry Research

Vol. 1, Issue 2, Part A (2019)

Effect of herbicidal weed management on growth, yield attributes and productivity of Lathyrus (Lathyrus sativus L.) for Chhattisgarh

Author(s):

Amar Nath, Dr. Rama Mohan Savu and Dr. Nitish Tiwari

Abstract:

The present research entitled “Effect of herbicidal weed management on growth, yield attributes and productivity of Lathyrus (Lathyrus sativus L.) for Chhattisgarh" was conducted during Rabi season of 2020-21 at the Instructional Farm, College of Agriculture, Raipur (CG). The soil of experimental site was sandy loam, poor in available nitrogen, medium in available phosphorus and rich in potassium contents with neutral pH. The experiment was laid out in Randomized Block Design with three replications. The treatments consisted of fifteen weed management practices viz, T1: Oxadiargyl @ 80 g/ha 0-3 DAS, T2: Metribuzin @ 350 g/ha 0-3 DAS, T3: Topramezone @ 19.35 g/ha 2-3 Leaf stage of weed, T4: Topramezone @ 25.8 g/ha 2-3 Leaf stage of weed, T5: Topramezone @ 32.25 g/ha 2-3 Leaf stage of weed, T6: Topramezone (directed application) @ 25.8 g/ha 5-6 Leaf stage of weed, T7: Fluzifop-p-butyl 13.4 % + Fomesafen 11.1 % (directed application) @ 250 g/ha 5-6 Leaf stage of weed, T8: Metribuzin @ 350g/ha fb Topramezone @ 25.8 g/ha at 0-3 DAS & 2-3 Leaf stage of weed, T9: Metribuzin @ 350g/ha fb Metribuzin @ 350 g/ha at 0-3 DAS & 5-6 Leaf stage of weed, T10: Fluzifop-p-butyl 13.4 % + Fomesafen 11.1 % @ 250 g/ha 2-3 Leaf stage of weed, T11: Sodium acifluorfen 16.5 %+ clodinafop proparzyl 18 % (directed application) @ 187.5g/ha 2-3 leaf stage of weed T12: Mertibuzin (directed application) @ 350 g/ha 2-3 leaf stage of weed, T13: Metsulfuron (directed application) @ 4 g/ha 2-3 leaf stage of weed, T14: Hand weeding twice 20 & 40 DAS and T15: Unweeded control. The Lathyrus variety Prateek was sown on November 15, 2020 and harvested on March 8, 2021.

The experimental finding showed that the growth characteristics viz. plant population, plant height, number of branches/plant, dry weight accumulation (g/plant), number of nodules/plant, dry weight nodules/plant and crop growth rate and yield attributes viz., number of seeds/plant, number of seeds/pod, seed yield, Stover yield, 100 seed weight and harvest index were found significantly superior in Hand weeding twice 20 & 40 DAS (T14), over other weed management practices but was at par with treatment T9: Metribuzin @ 350g/ha fb Metribuzin @ 350g/ha at 0-3 DAS & 5-6 Leaf stage of weed.

The lower values of above characters have been observed in the unwedded control (T15) followed by Fluzifop-p-butyl 13.4 % + Fomesafen 11.1 % @ 250 g/ha 2-3 Leaf stage of weed (T10). Predominant weed species Medicago denticulate L., Cichorium intybus L., Chenopodium album L., Melilotus indica L, Alternanthera sessilis L, Echinochloa colona L. and Physallis minima L, intensified in the experimental field. Hand weeding twice 20 & 40 DAS (T14) followed by Topramezone @ 32.25 g/ha 2-3 Leaf stage of weed (T5) observed in effectively reducing weed density, weed dry matter accumulation, lowest weed growth rate and thus providing maximum weed control efficiency and weed control index. While, the weed index was higher at Unwedded control (T15).

In term of economic returns, the gross returns and net return was maximum under Hand weeding twice 20 & 40 DAS (T14) followed Metribuzin @ 350 g/ha fb Metribuzin @ 350 g/ha at 0-3 DAS & 5-6 Leaf stage of weed (T9), whereas, net return and B: C ratio was maximum under Metribuzin @ 350 g/ha fb Metribuzin @ 350 g/ha at 0-3 DAS & 5-6 Leaf stage of weed (T9). This might be because of higher cost of cultivation due to continuous frequent weeding in Hand weeding twice 20 & 40 DAS plot (T14).

Pages: 33-36  |  22 Views  6 Downloads

How to cite this article:
Amar Nath, Dr. Rama Mohan Savu and Dr. Nitish Tiwari. Effect of herbicidal weed management on growth, yield attributes and productivity of Lathyrus (Lathyrus sativus L.) for Chhattisgarh. Int. J. Adv. Chem. Res. 2019;1(2):33-36.