Incidence of Rice Hispa, Dicladispa Armigera (Coleoptera: Chrysomelidae) on Kharif Paddy in the Agro Climatic Conditions of the Northern Parts of West Bengal, India

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Dr. Kaushik Chakraborty
Dr. Kaushik Chakraborty
2
Debes Chandra Deb
Debes Chandra Deb
1 University of Gour Banga

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GJSFR Volume 12 Issue C7

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Incidence of Rice Hispa, Dicladispa Armigera (Coleoptera: Chrysomelidae) on Kharif  Paddy in the Agro Climatic Conditions of the Northern Parts of West Bengal, India Banner
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Incidence of rice hispa (RH), Dicladispa armigera population in paddy crop (Oryza sativa L.) field was assessed by sweep net estimation during four consecutive crop seasons (2005-2008) at Hemtabad, Uttar Dinajpur, West Bengal. The RH population was initiated at about 29 standard meteorological weeks (SMW), improved at first slowly up to 27 SMW then steadily up to 35 SMW attaining the maximum at about 36 SMW which was maintained up to about 38 SMW. The population then subsumed at first slowly up to 40 SMW then abruptly. After 43 SMW insignificant number of RH population was detected. Abiotic conditions such as maximum temperature, temperature gradient, maximum relative humidity, humidity gradient and average relative humidity had significant positive influence on D. armigera population. An insignificantly positive relation was also found with the average temperature. In case of minimum temperature, minimum relative humidity, sunshine hours and heavy rainfall, a negative influence on population development was observed.

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No external funding was declared for this work.

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The authors declare no conflict of interest.

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Dr. Kaushik Chakraborty. 2012. \u201cIncidence of Rice Hispa, Dicladispa Armigera (Coleoptera: Chrysomelidae) on Kharif Paddy in the Agro Climatic Conditions of the Northern Parts of West Bengal, India\u201d. Global Journal of Science Frontier Research - C: Biological Science GJSFR-C Volume 12 (GJSFR Volume 12 Issue C7): .

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GJSFR Volume 12 Issue C7
Pg. 53- 61
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Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

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December 11, 2012

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English

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Incidence of rice hispa (RH), Dicladispa armigera population in paddy crop (Oryza sativa L.) field was assessed by sweep net estimation during four consecutive crop seasons (2005-2008) at Hemtabad, Uttar Dinajpur, West Bengal. The RH population was initiated at about 29 standard meteorological weeks (SMW), improved at first slowly up to 27 SMW then steadily up to 35 SMW attaining the maximum at about 36 SMW which was maintained up to about 38 SMW. The population then subsumed at first slowly up to 40 SMW then abruptly. After 43 SMW insignificant number of RH population was detected. Abiotic conditions such as maximum temperature, temperature gradient, maximum relative humidity, humidity gradient and average relative humidity had significant positive influence on D. armigera population. An insignificantly positive relation was also found with the average temperature. In case of minimum temperature, minimum relative humidity, sunshine hours and heavy rainfall, a negative influence on population development was observed.

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Incidence of Rice Hispa, Dicladispa Armigera (Coleoptera: Chrysomelidae) on Kharif Paddy in the Agro Climatic Conditions of the Northern Parts of West Bengal, India

Dr. Kaushik Chakraborty
Dr. Kaushik Chakraborty University of Gour Banga
Debes Chandra Deb
Debes Chandra Deb

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