EFFICACY OF SELECTED INSECTICIDES AGAINST TERMITES
Loading...
Files
Date
2014-07-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Agricultural Sciences GKVK, Bangalore
Abstract
Present investigation was carried out at the botanical garden, University of
Agricultural Sciences, GKVK, Bangalore during 2013-14. The insecticides viz.,
clothianidin 7.5 CS, fipronil 5 SC and bifenthrin 8 EC were evaluated against termites by
different methods viz., modified ground board method (MGBM), petri dish method, glass
tube test method and wood treatment. The impact of these insecticides on non-target soil
biota was also assessed. In MGBM, clothianidin @ 0.1, 0.075 and bifenthrin @ 0.05%
protected the wood bait up to 11 months. LT50 values for Odontotermes horni workers
was lowest in bifenthrin @ 0.05% (3.69 h) followed by clothianidin @ 0.1% (4.99 h),
clothianidin @ 0.075% (5.61 h), fipronil @ 0.075% (6.37 h), clothianidin @ 0.05% (7.23
h) and clothianidin @ 0.025% (7.66 h) at 1 MAT in petridish (Bioassay) method. Lower
penetration and higher mortality of termites was noticed in soil treated with clothianidin
@ 0.075%, 0.1% and bifenthrin @ 0.05% in glass tube test method. The wood stakes
treated with the insecticide solutions were effective in repelling the termites up to 11
MAT. The toxicity of chlorpyriphos on total soil invertebrates was more and was on par
with imidacloprid. Soil application of chlorpyriphos was found to be significantly more
toxic to collembolans. Imidacloprid treated soil showed significantly higher toxicity to
cryptostigmata. On the other hand, propargite found more toxic to other acari. Other
invertebrates were more susceptible to the chlorpyriphos and was on par with fipronil,
imidacloprid and buprofezin. Relative abundance of soil invertebrates also documented.
Description
Keywords
---