volume 41 issue 1 (march 2007) : 67 - 70
EFFECT OF ABIOTIC FACTORS ON MUSTARD APHID (LIPAPHIS ERYSIMI KALT.) ON INDIAN BRASSICA
1Department of Agricultural Meteorology,
Chaudhary Charan Singh Haryana Agricultural University, Hisar - 125 004, India
ABSTRACT
To determine the relative role of weather variables on mustard aphid Lipaphis erysimi (Kalt) population, field experiments were conducted. The study revealed that in early sown Indian mustard, the aphid population had a significant negative correlation with minimum and maximum temperature. Similarly, the morning and evening RH, and rainfall showed negative correlation with aphid population. On division of aphid infestation period into three different phases of infestation, it was observed that during the establishment phase, the weather parameters had significant role in governing the aphid population. The temperature, rainfall and sunshine hours were negatively correlated, whereas, morning and evening relative humidity and wind speed showed positive correlation. During the declining phase, wind speed alongwith temperature had negative relationship with aphid population build up.
KEYWORDS
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This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Indian Journal of Agricultural Research
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