INFLUENCE OF WEATHER PARAMETERS ON FRUIT FLY TRAP CATCHES IN DHARWAD, KARNATAKA

CH. RAVIKUMAR, SHASHIDHAR VIRAKTAMATH

Abstract


Studies were made on the fruit fly population dynamics and influence of
weather parameters in guava and mango orchards at Dharwad (Karnataka, South India) from July 2004 to June 2005 by using methyl eugenol traps. Fruit fly population was observed throughout the year in both guava and mango orchards. In guava orchard, population of Bactrocera correcta peaked during first week of July in 2004 and fourth week ofMay in 2005. B. dorsalis had three peaks in 2004 during first week ofJuly, second and fourth week of November while in 2005, the population peaked during second week of March and May. Population ofB. zonata showed one major peak in 2004 during second week of November and two peaks in 2005 during third week ofApril and May. In mango orchard, B. correcta had one peak each in 2004 and 2005 during first week of July and second week of May, respectively. B. dorsalis had two peaks in 2004 during first week of July and third week of November while in 2005, it showed one peak during third week of May. In 2004, B. zonata had one peak during fourth week of September while in 2005, it had three peaks during third week of March, second week ofApril and fourth week of May. In guava, B. correcta and B. zonata had significant positive correlation with temperature, while B. dorsalis had significant negative correlation with morning relative humidity and rainfall. In mango, B. correcta had highly significant positive correlation with minimum temperature and relative humidity. B. dorsalis and B. zonata had highly significant positive correlation with temperature and negative correlation with afternoon relative humidity.


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