Effect of number and size of holes of trap on capturing efficiency of Bactrocera spp. in mango.
Shankar M., Rao S. R. K., Umamaheswari T., Reddy K. D.
Author Affiliation: Department of Entomology, Acharya N.G. Ranga Agricultural University, Rajendranagar, Hyderabad - 500 030, India.
Annals of Plant Protection Sciences 18 : 231-232
Abstract : Field studies were conducted in Andhra Pradesh, India, to determine the effect of the number and size of holes on traps on the capturing efficiency of Bactrocera spp. (B. dorsalis, B. correcta and B. zonata) in mango. The treatments comprised transparent bottle traps (1000 ml), with 1, 2, 3, 4, 5 and 6 holes (20 mm dia.), and transparent bottles having circular holes of 4, 8, 12, 16, 20 and 24 mm in diameter, with plywood blocks soaked in a mixture of methyl eugenol and malathion (8:1), suspended at a height of 2 m above the ground. The plascement of traps was changed at regular intervals to avoid position effect. The number of trapped adult fruit flies were recorded at weekly intervals. Results showed that higher fruit fly numbers were recorded in the treatment bottle with 4 holes with 20 mm size (9.37 flies/trap/week), followed by the trap with one hole (9.33 flies/trap/week). The influence of hole size revealed that fruit fly adults were attracted to the traps with 8 mm dia. holes (9.33 flies/trap/week), which was attributed to the quick dispersal of methyl eugenol and the influence of weather factors.