Table 1. Control of apple maggot flies by odor-baited sticky-coated wooden spheres, wooden pesticide-treated spheres (PTS), biodegradable pesticide-treated spheres, or three applications of azinphosmethyl in 32 blocks of medium-size apple trees in eight commercial orchards in 1998.

Mean no. flies captured per block

Treatment

Perimeter traps
Interior monitoring traps
Mean % injured fruit per block*

Sticky spheres

1702.5
137.3
0.70

Wooden PTS

--
210.8
2.93

Biodegradable PTS

--
272.4
0.77

Insecticide sprays (3)

--
123.6
0.59

* Values here represent injury during five sampling periods (every 2 weeks from mid-July through harvest), during which 100 fruit per block were sampled on each sampling date.