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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(4): 1671-1676
DOI: https://doi.org/10.20546/ijcmas.2020.904.195


Path Analysis of Climatic Factors Affects the Population of American Bollworm, Helicoverpa armigera (Hubner) Lepidoptera - Noctuidae in Cotton
Yogesh Patel* and V. K. Garg
Jawaharlal Nehru Agriculture University, College of Agriculture Ganj-Basoda, Distt. Vidisha-464221 M.P. India
*Corresponding author
Abstract:

The Path analysis of certain climatic factors affects the population of American Bollworm (ABW), Helicoverpa armigera (Hubner) Lepidoptera -Noctuidae in Cotton was assessed at the Jawharlal Nehru Krishi Vishwa Vidhyalaya, Cotton Research Station, Khandwa M.P. The perusal of data on the population of American bollworm, Helicoverpa armigera revealed that the American bollworm, Helicoverpa armigera larvae was first observed during the 29th SMW i.e.  III week of July. The population of ABW larvae showed increasing trend between 29th to 36th SMW and attained peak (24.01 larvae) during 36th SMW i.e. IInd week of September and remained active up to 1st SMW i.e. Ist eek of January. The weather condition prevailed during peak population of ABW larvae viz.  maximum temperature, minimum temperature, morning relative humidity,  evening relative humidity, sunshine hours, wind velocity, rainfall and rainy day  were 34.60°C, 26.15°C,  80.97 %, 50.65%, 8.38 hours per day, 4.80  kmph, 21.50 mm and 1.50 days respectively. The correlation studies between ABW population and weather factors revealed that the ABW larva population had a significant positive correlation with maximum temperature and minimum temperature. The multiple coefficient value between the ABW population and group of variable clearly indicated that 51.70% change in ABW population were affected by maximum temperature, minimum temperature, morning relative humidity, evening relative humidity, sunshine hours, wind velocity, rainfall and rainy days respectively. The Path coefficient analysis of different factors revealed that minimum temperature had positive and high direct effect followed by morning relative humidity, sunshine hours and evening relative humidity respectively. The further revealed that the positive indirect effect of high magnitude of minimum temperature was obtained via, sun shine hours and evening relative humidity respectively. Positive indirect effect of morning relative humidity was obtained via wind velocity, evening relative humidity, sunshine hours and maximum temperature. Positive indirect effect of sunshine hours was obtained via minimum temperature, rainfall, rainy days and morning relative humidity. Positive indirect effect of evening relative humidity was obtained via morning relative humidity and minimum temperature.


Keywords: Cotton, American bollworm, Weather, Population dynamics
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How to cite this article:

Yogesh Patel and Garg, V. K. 2020. Path Analysis of Climatic Factors Affects the Population of American Bollworm, Helicoverpa armigera (Hubner) Lepidoptera - Noctuidae in Cotton.Int.J.Curr.Microbiol.App.Sci. 9(4): 1671-1676. doi: https://doi.org/10.20546/ijcmas.2020.904.195