National Academy of Agricultural Sciences (NAAS)
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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 |
To study the Effect of Weather parameter on the Population of Pink Bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera –Gelechiidae) in Cotton variety JK-4 were studied consecutive two cropping seasons of Kharip. The Pink bollworm, Pectinophora gossyipiella larvae was first recorded during the 39th SMW i.e. last week of September and remained active up to 3rd SMW i.e. IIIrd week of January, After that population showed increasing trend and attained peak during 51st SMW i.e. third week of December. The weather condition prevailed during this week viz. maximum temperature, minimum temperature, morning relative humidity, evening relative humidity, sunshine hours and wind velocity were 29.65°C, 8.74°C, 82.39%, 40.14%, 7.67 hours per day and 2.86 kmph, respectively. Further, The PBW population had a significant negative correlation with maximum temperature, minimum temperature, wind velocity, rainfall and rainy days. The multiple regression computed involving combined effect of maximum temperature (X1), minimum temperature (X2), morning relative humidity (X3), evening relative humidity (X4), sunshine hours (X5), wind velocity (X6), rainfall (X7) and rainy day (X8) was Y=116.155-2.591X1+0.078X2+0.344X3-0.161X4-2.769X5-8.391X6-0.191X7 + 10.789X8 (R2=0.899). The Path coefficient analysis revealed that morning relative humidity had positive and high direct effect on population of PBW, followed by wind velocity, maximum temperature and rainy days respectively.
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