Journal of FARM SCIENCES, Vol 23, No 1 (2010)

Font Size:  Small  Medium  Large

Ecology and management of shoot fly, Formosina flavipes Mall. (Chloropidae: Diptera) in small cardamom

D. Jemla Naik, D. Thippesha, S. Chandra Naik, K.M. Devaraju

Abstract


Field experiments were conducted to know the seasonal incidence and to evaluate different insecticides against cardamom shoot fly at Zonal Agricultural Research Station, Mudigere during 2005-06 to 2007-08. The maximum number of dead hearts was recorded during February and March compared to July and August months, which had minimum number of dead hearts. The dead hearts positively correlated with maximum temperature (r=0.750), sunshine hours (r=0.651) and negatively correlated with rainfall (r=-0.417), maximum Relative humidity (r=-0.469) and minimum temperature (r=-0.378). Among organic insecticides tested, thiamethoxam recorded minimum infestation (with 0.54 mean dead hearts) followed by quinalphos (with 0.73 mean dead hearts) as standard check, neem cake (with 1.09 mean dead hearts) and NSKE (with 1.99 mean dead hearts) compared to other treatments like fish oil (with 1.86 mean dead hearts) and nimbicidine (with 2.93 mean dead hearts). The development of   healthy suckers was higher in neem cake, quinalphos and thiamethoxam compared to other treatments. In another experiment with  organic and inorganic insecticides evaluated against shoot fly imidacloprid 200SL @ 0.5 ml per lit of water was found very effective against shoot fly with a mean number of 1.20 dead hearts followed by phorate 10G (0.98 mean dead hearts) and thiamethoxam (1.38 mean dead hearts) and neem cake (1.76 mean dead hearts) compared to fipronil (3.42 mean dead hearts), fish oil rosin soap (3.78 mean dead hearts) and neem seed kernel extract (4.79 mean dead hearts).

Full Text: PDF