Population dynamics of mustard aphid, Lipaphis erysimi on Brassica crop in relation to abiotic factors and sowing date

Authors

  • Dilbag Singh Ahlawat Assistant Scientist, CCS HAU, Regional Research Station, Rohtak, Haryana, India
  • Dalip Kumar Assistant Scientist, Department of Entomology, CCS HAU, Hisar, Haryana, India
  • Rakesh Punia Junior Plant Pathologist, Department of Plant Pathology, CCS Haryana Agricultural University, Hisar, Haryana, India

Keywords:

abiotic factors, correlation, Lipaphis erisimi, mustard, population dynamics

Abstract

Population dynamics of mustard aphid, Lipaphis erisimi on Brassica was carried out during Rabi season of 2018-19 at Research farm of CCS HAU Regional Research Station, Rohtak (India). Mustard variety RH 30 and RH 0749 were sown on two different dates i.e., 15th October (Timely) and 25th October (Late) in randomized block design with five replications in plot size of 4.2 x 3.0 m2. The population of mustard aphid, Lipaphis erisimi (nymphs + adults) per plant (10 cm long central mother axis) were recorded at weekly intervals starting from the month of January till harvesting of the crop. In mustard crop sown on 15th October, the peak of aphid population was 15.08 and 11.44 aphids/plant on variety RH 30 and RH 0749, respectively. Whereas, in case of crop seeded on 25th October, the peak of aphid population was recorded 18.46 and 12.74 aphids/plant on variety RH 30 and RH 0749, respectively. The average aphid population remained higher in 25th October seeded crop as compared to 15th October. Relative humidity of morning hours found directly associated with L. erysimi population on mustard crop in both dates of sowing and both varieties. Weather parameters especially relative humidity of evening hours and rainfall were impacted aphid population positively in both timely as well as late sown mustard crop. The degree of infestation and the rates of population change of the aphids also seemed to be governed by varietal character and flowering stage of the crop.

References

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Published

2021-12-20

How to Cite

[1]
D. S. . Ahlawat, D. . Kumar, and R. Punia, “Population dynamics of mustard aphid, Lipaphis erysimi on Brassica crop in relation to abiotic factors and sowing date”, J. Appl. Entomol., vol. 1, no. 2, pp. 15–18, Dec. 2021.

Issue

Vol. 1 No. 2 (2021)

Section

Articles

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Copyright (c) 2021 Dilbag Singh Ahlawat, Dalip Kumar, Rakesh Punia

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This work is licensed under a Creative Commons Attribution 4.0 International License.