Ecology, Environment and Conservation Paper

Vol 27, Feb Suppl. Issue, 2021; Page No.(40-47)

IMPACT OF SELECTED CROP ROTATION PRACTICES ON THE INCIDENCE OF INSECT PESTS IN PADDY FIELDS AT DINHATA, WEST BENGAL, INDIA

Gobinda Chandra Roy, Kaushik Chakraborty and Siddharthasankar Banerjee

Abstract

To evaluate the influence of crop rotation practices on the prevalence of four significant paddy insect pests, studies for three consecutive years (2012-2014) were conducted at Dinhata, Coochbehar, and West Bengal, India. Grossly 26 types of crop rotation practice and four major insect pests were distinguished in this area. The pests are yellow stem borer (YSB), brown plant hopper (BPH), gall midge (GM) and paddy bug (PB) correspondingly. Paddy-green manure, maize-paddy, jute-paddy, vegetable-paddy and pulses-paddy are more commonly practiced out of the all renowned crop rotational practices. Incidence of pest number (individuals/hill) and the extent of crop damage viz., dead heart (DH) + white head (WH) for YSB, damaged leaf area (DAL%) for BPH, silver shoot (SS%) for GM and unfilled grains (UG%) for PB under five selected crop rotation practices were compared with that of the result of monoculture field having two or three paddy crops in a year. Side by side incidence of pest population was also noted in fallow-paddy circumstance. Damage due to pest infestation was determined after assessing the number of infested hills (for YSB and GM), infested leaf (for BPH) and shockingly filled grains (for PB). Maximum number of pest individuals (7.14 YSB/5 hills, 19.68 BPH/hill, 14.81 GM/10 hills and 3.12 PB/hill) and the level of damage (7.16% DH +4.18% WH, 29.04% DAL, 40.1% SS and 40.31% UG) were noted in field having three consecutive paddy crops in a year. The least pest incidence (1.80 YSB/5 hills, 4.68 BPH/hill, 2.15 GM/10 hills and 0.98 PB/hill) with lowest level of damage (2.18% DH +2.50 WH, 10.14% DAL, 5.01% SS and 16.12% UG) was registered in field where paddy was grown after green manure production. Maximum yield (q/ha) with highest cost: benefit value (C: B) was registered in green manure-paddy (33-35q/ha) as the least was scored from the field with three successive paddy crop in a year (23-25q/ha).

Journal Issues
Vol 27, May Suppl. Issue, 2021
Vol 27, Issue 1, 2021
Vol 27, Feb Suppl. Issue, 2021
Vol 26, Issue 4, 2020
Vol 26, Nov Suppl. Issue, 2020
Vol 26, Oct Suppl. Issue, 2020
Vol 26, Issue 3, 2020
Vol 26, Aug Suppl. Issue, 2020
Vol 26, Issue 2, 2020
Vol 26, June Suppl. Issue, 2020
Vol 26, April Suppl. Issue, 2020
Vol 26, Issue 1, 2020
Vol 26, Feb Suppl. Issue, 2020
Vol 25, Issue 4 2019
Vol 25, Issue 3 2019
Vol 25, Nov Suppl. Issue, 2019
Vol 25, Sept Suppl. Issue, 2019
Vol 25, Aug Suppl. Issue, 2019
Vol 25, July Suppl. Issue, 2019
Vol 25, Issue 2 2019
Vol 25, May Suppl. Issue, 2019
Vol 25, April Suppl. Issue, 2019
Vol 25, Issue 1 2019
Vol 24, Issue 4 2018
Vol 24, Issue 3 2018
Vol 24, Issue 2 2018
Vol 24, Issue 1 2018
Vol 24, March Suppl. Issue 2018
Vol 24, Feb. Suppl. Issue 2018
Vol 23, Issue 4, 2017
Vol 23, Nov. Suppl. Issue 2017
Vol 23, Sept. Suppl. Issue 2017
Vol 23, Issue 2, 2017
Vol 23, Issue 3, 2017
Vol 23, Issue 1, 2017
Vol 23, Feb 2017 Suppl. Issue
Vol 22, Dec 2016 Suppl. Issue
Vol 22, Issue 4, 2016
Vol 22, Sept. Suppl. Issue , 2016
Vol 22, Issue 3, 2016
Vol. 22, June Suppl. Issue 2016
Vol 22, Issue 2, 2016
Vol. 22, April Suppl. Issue 2016
Vol 22, Issue 1, 2016
Vol 21, Issue 4, 2015
Vol. 21 Dec. 2015 Suppl. Issue
Vol. 21 Nov. 2015 Suppl. Issue
Vol 21, Issue 3, 2015
Vol 21, Issue 2, 2015
Vol. 21 Suppl.Issue August 2015
Vol 21.Suppl.Issue June 2015
Vol 21, Issue 1, 2015
Supplement Issue, Dec. 2014
Special Issue-2014
Vol 20, Issue 4, 2014
Vol 20, Issue 3, 2014
Vol 20, Issue 2, 2014
Vol. 20 Issue 01, 2014
Vol. 19 Issue 04, 2013
Vol. 19 Issue 03, 2013
Vol. 19, Issue 02, 2013
Vol. 19, Issue 01, 2013
Vol.18, Issue 04, 2012
Vol.18, Issue 3, 2012
Vol.18, Issue 2, 2012
Vol.18, Issue 1, 2012
Vol.17, Issue 4, 2011
Vol.17, Issue 3, 2011
Vol.17, Issue 2, 2011
Vol.17, Issue 1, 2011
Vol.16, Issue 4, 2010
Vol.16, Issue 3, 2010
Vol.16, Issue 2, 2010
Vol.16, Issue 1, 2010
Vol.15, Issue 04, 2009
Vol.15, Issue 03, 2009
Vol.15, Issue 02, 2009
Vol.15, Issue 1, 2009
Vol.14, Issue 04, 2008
Vol.14, Issue 2-3, 2008
Vol.14, Issue 2-3, 2008
Vol.14, Issue 1, 2008
Vol.14, Issue 2-3, 2008
Vol.13, Issue 04, 2007
Vol.13, Issue 2, 2007
Vol.13, Issue 1, 2007
Vol.12, Issue 4, 2006
Vol.12, Issue 3, 2006
Vol.12, Issue 2, 2006
Vol.12, Issue 1, 2006
Vol.12, Issue 01, 2006
Vol.11, Issue 3,4, 2005
Vol.11, Issue 2, 2005
Vol.11, Issue 1, 2005
Vol.10, Issue 04, 2004
Vol.10, Issue 03, 2004
Vol.10, Issue 02, 2004
Vol.10, Issue 01, 2004
Vol.09, Issue 04, 2003
Vol.09, Issue 03, 2003
Vol.09, Issue 02, 2003
Vol.08, Issue 04, 2002
Vol.08, Issue 03, 2002
Vol.08, Issue 01, 2002
Vol.07, Issue 04, 2001
Vol.07, Issue 03, 2001
Vol.07, Issue 02, 2001
Vol.07, Issue 01, 2001
Vol.06, Issue 04, 2000
Vol.06, Issue 03, 2000
Vol.06, Issue 02, 2000
Vol.06, Issue 01, 2000
Vol.05, Issue 04, 1999
Vol.05, Issue 03, 1999
Vol.05, Issue 02, 1999
Vol.05, Issue 01, 1999
Vol.04, Issue 1,2, 1998
Vol.03, Issue 3,4, 1997
Vol.03, Issue 01, 1997
Vol.02, Issue 1,2, 1996
Vol.01, Issue 14, 1995
Looking for Past Issues? Click here to get them!!