Abstract
The peach fruit fly, Bactrocera zonata Saunders (Diptera: Tephritidae) is a very deleterious insect pest for fruits of many horticultural hosts. Boric acid had tested as a safe and friendly-environmental insecticide againstthe pest as baits for adults. Five formulations of baits (water, sugar solution at 5 and 10 % as well as Buminal solutions at 2.5 and 5 %) were applied at 4 concentrations of boric acid (0.5, 1, 1.5 and 2 %)for the newly emerged, 24 hrs old starved flies and 48 hrs old starved flies. The mortality percentages were recorded after 24 hrs and 48 hrs of application. The mortality percentages significantly ranged between 30- 90.67 for the newly emerged flies after 24 hrs and 34.67- 100 after 48 hrs. Also, the ranges of mortality for 24 hrs starved flies significantly were 42.33- 88.67 % after 24 hrs and 55- 100 % after 48 hrs, whereas that recorded for 48 starved flies significantly were 70.33- 93.67 % after 24 hrs and insignificantly 96- 100 % after 48 hrs. Also, results revealed that the mortality percentages increased with the increase of boric acid concentrations, exposure period of application and starvation duration. According to these results, it is recommended to use boric acid in control of peach fruit fly as effective partial bait or mass trapping techniques that ensure no direct contact with the plants.
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