A Preliminary Report on Large-Scale Bait Trapping of the Oriental Fruit Moth1 in Indiana And Georgia

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Abstract
Two 500-acre bait-trap experiments against the oriental fruit moth ( Laspeyresia Molesta Busch) were initiated in 1930, one at Vincennes, Indiana, and the other at Cornelia, Georgia. At the former locality a molasses-citral bait failed to give any evidence of control. At Cornelia a peach-juice granulated sugar combination appeared to somewhat reduce the infestation; however, the light infestation and the unusual seasonal conditions apparently so affected the results that they are not convincing. The overwintering brood appeared larger in the baited area at Vincennes and in the unbaited area at Cornelia. A total crop failure in Indiana together with severe drought conditions complicated results. A large number of other possible bait solutions were tested at each locality. Among 414 solutions tested at Cornelia over 40 proved superior to that used in the large area. The latter was less than 25 per cent as attractive as an ethyl cinnamate mediumbrown sugar combination. At Vincennes the most attractive solution was a combin, p.tionof methyl cinnamate and brown sugar. At Cornelia 69 and 78 per cent recoveries were made within 5 days, of marked moths released inside a 14-acre experimental block. Ten per cent of a release made in an unbaited peach orchard more than one-fourth mile away was recovered in this small block. The average distance traveled was one-third mile. There is evidence that following emergence many oriental fruit moths travel more than 200 yards before beginning to oviposit. Very few eggs were deposited by moths before their capture. Experiments with released moths indicate that a small baited block containing 1,000 traps or less, if surrounded by unbaited peaches, may draw more moths from the unbaited territory than were naturally present in the orchard baited. At both Vincennes and Cornelia the small 8 and 14-acre blocks containing experimental solutions averaged, respectively, twelve and five times as many moths per trap as the large 500-acre areas. .

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