6.RELATIVE ABUNDANCE OF FRUIT FLY SPECIES IN THEIR WILD HOST BY F. K. CHAUDHARY AND G. M. PATEL
An intensive survey was carried out on seven wild cucurbitaceous host plants viz., Coccinia
grandis L., Momordica charantia L., Cucumis callosus (Rott.) Cogr., Luffa acutangula L.,
Citrullus colocynthis L., Momordica dioica Roxb. and Trichosanthes bracteata Lam. at fortnight
interval. From the two year result the mean relative abundance of fruit fly species was computed
wild host. The mean relative abundance of Bactrocera cucurbitae Coquillett and Dacus ciliatus
Loew was 23.00 and 77.00 in C. grandis, 3.14 and 96.86 in M. charantia, 57.29 and 42.71 in C.
callosus, 89.83 and 10.17 in L. acutangula, 27.68 and 72.32 in C. colocynthis, 58.76 and 41.24 in
M. dioica and 25.53 and 74.47 in T. bracteata, respectively. The descending order of abundance
of B. cucurbitae in wild hosts was L. acutangula > M. dioica >C. callosus > C. colocynthis >
T. bracteata > C. grandis > M. charantia, while such order was reverse for D. ciliatus. Thus, B.
cucurbitae and D. ciliatus were most abundance on L. acutangula (89.83 %) and M. charantia
(96.86 %) in wild hosts, respectively. Irrespective of host plants and period, the mean relative
abundance of B. cucurbitae and D. ciliatus was 28.78 and 71.22 per cent in wild host,
KEY WORDS: Fruit fly, wild host, relative abundance.