Vol. 3 (1) : January-February 2012 issue
Green Farming Vol. 3 (1) : 1-9 (January-February, 2012)
Impact of foliar application of biopesticides on soil fauna in organically grown fieldbean ecosystem
A.M. BYRAPPA1 and N.G. KUMAR2
Deptt. of Agric. Entomology, College of Agriculture, University of Agric. Sciences, GKVK, Bangalore - 560 065 (K.K.)
Designation : 1P.G.Student *(nnnbyra@rediffmail.com), 2Professor
Subject : Entomology
Paper No. :
Total Pages : 9
Received : 19 December 2011
Revised accepted : 16 January 2012
First Page
Citation :
A.M. BYRAPPA and N.G. KUMAR. 2012. Impact of foliar application of biopesticides on soil fauna in organically grown fieldbean ecosystem. Green Farming Vol. 3 (1) : 1-9 ; January-February, 2012
ABSTRACT
The investigation was carried out at the Agriculture Research Station, Balajigapade, Chickaballapura district during kharif season 2009. The evaluated biopesticides were NSKE (5%), HaNPV (250 LE/ha), Bt (1kg/ha), neem oil (2%), Panchagavya (3%), Clerodendron + Cow urine extract (10%) and sequential spray of HaNPV-Bt -NSKE, Bt-NSKE-HaNPV and NSKE-HaNPV-Bt. FYM (9.5 t ha-1) and bio-digester liquid (6,500 l ha-1) were applied to organic plots. Sequential spray of insecticidal spray (Carbaryl-endosulfan-malathion) and recommended dose of FYM (7 t ha-1), fertilizer (25:50:25 kg NPK ha-1) were applied to inorganic plot. Organically treated plots recorded significantly higher total soil invertebrates, total acari,
collembola, other soil invertebrates and macrofauna as compared to standard check. Higher quantity of soil pH, organic carbon, available nitrogen, available phosphorous, available potassium, Ex. calcium, Ex. magnesium and microbial biomass were recorded in organically treated plots than inorganic plots. Total soil invertebrates, soil acari, collembola and other invertebrates abundance showed significant negative correlation with soil temperature, whereas soil moisture and total rainfall showed positive correlation. Significant positive correlation existed between total rainfall and other soil invertebrates.
Key words :
Acari, bio-pesticides, Collembola, fieldbean, invertebrates, macrofauna, organic farming, soil fauna, soil fertility.
