ATTRACTION OF INDIAN FRUIT FLIES TO COLOURED SPHERES
The attraction of Tephritid fruit ﬂies (mostly melon ﬂies, Bactrocera cucurbime Coq.) to coloured plastic balls was assessed in ﬁelds in different parts of India. Near Thrissur (Kerala, southem India) melon ﬂies were attracted to yellow, green and red; those near Bhubaneswar (Orissa, eastern India) were attracted to green and pink but not orange; those near Anand (Gujarat, western India) were attracted to pink, red and green. Bnctmcem species near Sardarknrshinagar (Gujarat, western India) were attracted signiﬁcantly more to balls of increasing redness along the scale yellow-orange- red. Flies near Thiruvananthapuram were attracted, in rank order, most to orange, then yellow, violet, green, red and blue, and to balls of 8cm diameter signiﬁcantly more than of 6cm. Overall, ﬂies were attracted to an increasing scale of“redness" with a peak at yellow/orange rather than red itself.
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